Amphitrite bombyx Dalyell, 1853 accepted as Branchiomma bombyx (Dalyell, 1853) (original description)
Amphitrite floscula Dalyell, 1853 accepted as Myxicola infundibulum (Montagu, 1808) (original description)
Amphitrite luna Dalyell, 1853 (original description)
Amphitrite ventilabrum Gmelin, 1791 in Linnaeus accepted as Sabella spallanzanii (Gmelin, 1791) (additional source)
Aphrodita arcta Dalyell, 1853 accepted as Sthenelais limicola (Ehlers, 1864) (original description)
Aphrodita cirrosa Dalyell, 1853 accepted as Alentia gelatinosa (M. Sars, 1835) (original description)
Aphrodita varians Dalyell, 1853 accepted as Harmothoe imbricata (Linnaeus, 1767) (original description)
Aphrodita velox Dalyell, 1853 accepted as Scalisetosus communis (Delle Chiaje, 1851) (original description)
Ascaris flustrae Dalyell, 1853 (original description)
Ascaris flustrae Dalyell, 1853 (basis of record)
Clymene borealis Dalyell, 1853 (original description)
Eolis conspersa Dalyell, 1853 accepted as Cuthona foliata (Forbes & Goodsir, 1839) accepted as Trinchesia foliata (Forbes & Goodsir, 1839) (original description)
Eolis deaurata Dalyell, 1853 accepted as Cuthona caerulea (Montagu, 1804) accepted as Trinchesia caerulea (Montagu, 1804) (original description)
Eolis plumata Dalyell, 1853 accepted as Aeolidia papillosa (Linnaeus, 1761) (original description)
Eolis sanguifera Dalyell, 1853 accepted as Cuthona gymnota (Couthouy, 1838) accepted as Catriona gymnota (Couthouy, 1838) (original description)
Eolis ventilabrum Dalyell, 1853 accepted as Tenellia adspersa (von Nordmann, 1845) (original description)
Filipora filograna Dalyell, 1853 accepted as Salmacina dysteri (Huxley, 1855) (original description)
Gordius albicans Dalyell, 1853 accepted as Amphiporus lactifloreus (Johnston, 1828) (original description)
Gordius albus Dalyell, 1853 accepted as Lineus lacteus (Rathke, 1843) (original description)
Gordius anguis Dalyell, 1853 accepted as Tubulanus superbus (Kölliker, 1845) (original description)
Gordius fasciatus Dalyell, 1853 (original description)
Gordius fasciatus spinifer Dalyell, 1853 represented as Gordius spinifer fasciatus Dalyell, 1853 accepted as Micrura fasciolata Ehrenberg, 1828 (original description)
Gordius fragilis Dalyell, 1853 accepted as Cerebratulus marginatus [Renier], [1804] (original description)
Gordius fragilis spinifer Dalyell, 1853 represented as Gordius spinifer fragilis Dalyell, 1853 accepted as Micrura fasciolata Ehrenberg, 1828 (original description)
Gordius fuscus Dalyell, 1853 accepted as Emplectonema neesii (Örsted, 1843) (original description)
Gordius gracilis Dalyell, 1853 accepted as Procephalothrix filiformis (Johnston, 1828) accepted as Cephalothrix filiformis (Johnston, 1828) (original description)
Gordius integer Dalyell, 1853 (original description)
Gordius maximus Dalyell, 1853 accepted as Lineus longissimus (Gunnerus, 1770) (original description)
Gordius minor Dalyell, 1853 (original description)
Gordius minor viridis Dalyell, 1853 (original description)
Gordius purpureus Dalyell, 1853 (original description)
Gordius purpureus spinifer Dalyell, 1853 represented as Gordius spinifer purpureus Dalyell, 1853 accepted as Micrura purpurea (Dalyell, 1853) (original description)
Gordius spinifer Dalyell, 1853 (original description)
Gordius taenia Dalyell, 1853 accepted as Lineus bilineatus (Renier, 1804) accepted as Siphonenteron bilineatum Meneghini in Renier, 1847 (original description)
Gordius viridis spinifer Dalyell, 1853 accepted as Gordius spinifer viridis Dalyell, 1853 (original description)
Holothuria bodotriae Dalyell, 1851 accepted as Ocnus lacteus (Forbes & Goodsir, 1839) (original description)
Holothuria scotica Dalyell, 1851 accepted as Thyone fusus (O.F. Müller, 1776) (original description)
Lumbricus hirsutus Dalyell, 1853 (original description)
Nais lacustris Dalyell, 1853 accepted as Chaetogaster diaphanus (Gruithuisen, 1828) (original description)
Nais proboscidea Müller, 1774 accepted as Stylaria lacustris (Linnaeus, 1758) (additional source)
Nephthys hirsuta Dalyell, 1853 accepted as Nephtys caeca (Fabricius, 1780) (original description)
Nereis (Nephtys) Cuvier, 1817 accepted as Nephtys Cuvier, 1817 (basis of record)
Nereis (Nephtys) hirsuta Dalyell, 1853 (original description)
Nereis (Nephtys) lineata Dalyell, 1853 accepted as Nephtys caeca (Fabricius, 1780) (original description)
Nereis aries Dalyell, 1853 accepted as Scolelepis vulgaris (Johnston, 1827) (original description)
Nereis bullata Dalyell, 1853 accepted as Sphaerodorum gracilis (Rathke, 1843) (original description)
Nereis contorta Dalyell, 1853 (original description)
Nereis ellipsis Dalyell, 1853 accepted as Eulalia ellipsis (Dalyell, 1853) (original description)
Nereis foliata Dalyell, 1853 accepted as Scolelepis squamata (Müller, 1806) represented as Scolelepis (Scolelepis) squamata (O.F. Muller, 1806) (original description)
Nereis fulgens Dalyell, 1853 accepted as Nereis pelagica Linnaeus, 1758 (original description)
Nereis monoceros Dalyell, 1853 (original description)
Nereis parva Dalyell, 1853 accepted as Spio parva (Dalyell, 1853) (original description)
Nereis pectinata Dalyell, 1853 (original description)
Nereis phasma Dalyell, 1853 accepted as Tomopteris helgolandica Greeff, 1879 represented as Tomopteris (Johnstonella) helgolandica (Greeff, 1879) (original description)
Nereis punctata Dalyell, 1853 (original description)
Nereis remex Dalyell, 1853 accepted as Phyllodoce lamelligera (Gmelin in Linnaeus, 1788) (original description)
Nereis teres Dalyell, 1853 (original description)
Nereis villosa Dalyell, 1853 (original description)
Nerine foliata Dalyell, 1853 accepted as Scolelepis foliosa (Audouin & Milne Edwards, 1833) represented as Scolelepis (Scolelepis) foliosa (Audouin & Milne Edwards, 1833) (original description)
Planaria alba Dalyell, 1853 (original description)
Planaria cuneus Dalyell, 1853 accepted as Vortex truncatus (Abildgaard, 1879) Ehrenberg, 1831 accepted as Jensenia truncata (Abildgaard, 1879) Graff, 1904-08 accepted as Castrella (Castrella) truncata (Abildgaard, 1789) Sekera, 1906 (original description)
Planaria flustrae Dalyell, 1853 accepted as Monocelis lineata (Müller, 1773) Oersted, 1843 (original description)
Planaria fodinae Dalyell, 1853 accepted as Derostoma fodinae (Dalyell, 1853) Noreña, Eitam & Blaustein accepted as Phaenocora unipunctata (Ørsted, 1843) Bendl, 1908 (original description)
Planaria foecunda Dalyell, 1853 accepted as Typhloplana foecunda (Dalyell, 1853) Johnston, 1865 accepted as Mesostoma stagni (Dalyell, 1853) Leuckart, 1859 (original description)
Planaria graminea Dallyel, 1814 accepted as Dalyellia graminea (Dalyell, 1814) Fleming, 1822 accepted as Vortex viridis (Shaw, 1791) Schultze, 1851 accepted as Vortex helluo (Müller, 1773) Hallez, 1894 accepted as Dalyellia viridis (Shaw, 1791) Graff, 1905 (redescription)
Planaria hebes Dalyell, 1852 accepted as Foviella affinis (Ørsted, 1843) (original description)
Planaria prasina Dalyell, 1853 accepted as Typhloplana prasina (Dalyell, 1853) Johnston, 1865 accepted as Mesostoma viridatum (Abildgaard, 1789) Schultze, 1851 accepted as Typhloplana viridata (Abildgaard, 1789) Ehrenberg, 1831 (original description)
Planaria serpentina Dalyell, 1853 accepted as Opistomum serpentina (Dalyell, 1853) Johnston, 1865 accepted as Prorhynchus serpentinus (Dalyell, 1853) Leuckart, 1859 accepted as Prorhynchus stagnalis Schultze, 1851 (original description)
Planaria stagni Dalyell, 1853 accepted as Mesostoma stagni (Dalyell, 1853) Leuckart, 1859 (original description)
Planaria vorax Dalyell, 1853 accepted as Derostoma vorax (Dalyell, 1853) Johnston, 1865 accepted as Mesostoma viridatum (Abildgaard, 1789) Schultze, 1851 accepted as Typhloplana viridata (Abildgaard, 1789) Ehrenberg, 1831 (original description)
Planocera corniculata (Dalyell, 1853) accepted as Stylochoplana maculata (Quatrefage, 1845) (original description)
Sabella alveolaria Dalyell, 1853 accepted as Sabellaria alveolata (Linnaeus, 1767) (original description)
Siphonostoma gelatinosa Dalyell, 1853 accepted as Flabelligera affinis M. Sars, 1829 (original description)
Spio celata Dalyell, 1853 (original description)
Spio seticornis (Linnaeus, 1767) (additional source)
Terebella conchilega (Pallas, 1766) accepted as Lanice conchilega (Pallas, 1766) (additional source)
Terebella figulus Dalyell, 1853 accepted as Neoamphitrite figulus (Dalyell, 1853) (original description)
Terebella littoralis Dalyell, 1853 [non Linnaean as 'littoralis seu arenaria'] accepted as Lanice conchilega (Pallas, 1766) (original description)
Terebella maculata Dalyell, 1853 accepted as Pista maculata (Dalyell, 1853) (original description)
Terebella ostreae Dalyell, 1853 accepted as Dodecaceria concharum Örsted, 1843 (original description)
Terebella pecten Dalyell, 1853 accepted as Terebellides stroemii Sars, 1835 (original description)
Terebella textrix Dalyell, 1853 accepted as Nicolea zostericola Örsted, 1844 (original description)
Terebella tuberculata Dalyell, 1853 accepted as Eupolymnia nebulosa (Montagu, 1819) (original description)
Vermiculus Dalyell, 1853 (original description)
Vermiculus coluber Dalyell, 1853 (original description)
Vermiculus crassus Dalyell, 1853 (original description)
Vermiculus lineatus Dalyell, 1853 (original description)
Vermiculus rubens Dalyell, 1853 accepted as Nipponnemertes pulcher (Johnston, 1837) accepted as Nipponnemertes pulchra (Johnston, 1837) (original description)

Scotland for Planaria hebes Dalyell, 1852 
United Kingdom for Convoluta paradoxa Ørsted, 1843 

 Classification

 for Nereis (Nephtys) Cuvier, 1817

Dalyell moved Nephtys to a subgenus status in Nereis, but this is a misclassification. They are not the same family. [details]

 Editor's comment

 for Nereis pectinata Dalyell, 1853

As noted by Hartman catalogue, Dalyell's Nereis pectinata is not a polychaete. The several figures show what might ... [details]

 Spelling

 for Terebella littoralis Dalyell, 1853 [non Linnaean as 'littoralis seu arenaria']

It is not possible to present this name in WoRMS in the same form that Dalyell used. Dalyell (1853) named this ... [details]

 Taxonomy

 for Nereis teres Dalyell, 1853

Current taxon previously considered to be a junior synonym of Glycera capitata Örsted, 1843, but now regarded as ... [details]