1877.] ANTHOBRANCHIATE NUDIBRANCHIATE MOLLUSCA. 227 
b. Body very depressed, with large spicules symmetrically arranged. 
Spawn of many narrow coils. Odontophore with two large broad 
spines and two rudimentary ones ; no central plate. 
14. LaAMELLIpoRIS pEepREssA, Ald. & Hane. 
D. depressa, Ald. & Hance. Ann. & Mag. Nat. Hist. ix. p. 32. 
Villiersia seutigera, D’Orb.’ Mag. de Zool. vii. “‘Mém. sur des 
esp. &c. de l’ord. des Nud.” p. 14, pl. 109. f. 1-4 (1837). 
15. L. 1inconspicua, Ald. & Hane. 
D. inconspieua, id. Mon. Br. Nud. Moll. p. 43, and pt. 5, fam. 1. 
pl. 12. f. 9-16 (1851). 
Onchidoris inconspicua, Gray. 
Hab. British coast (Northumberland). 
16. L. Grisea. 
D. grisea, “‘Stimps. MS.,” Gould, Inv. Mass. 2nd ed. p- 232, 
pl. 20. f. 292, 295 (1870). 
flab. E. N. America (Massachusetts). 
17. L. TENELLA. 
D. tenelia, Agass. 1850 (no deser. or fig.) ; Gould, J. ¢. p. 229, 
pl. 20. f. 289, 290, and 293. 
Hab. E. N. America (Massachusetts). 
18. L. pusiuua, A. & H. 
D. pusilla, id. Ann. & Mag. Nat. Hist. xvi. p. 313 (1845). 
O. pusilla, Gray. 
Hab. 8. coast of England (Devonshire). 
19. L. sparsa, A. & H. 
D. sparsa, id. 1, e. vol. xviii. p. 293 (1846). 
O. sparsa, H. & A. Adams. 
Hab. British coast (Cullercoats), 
20. L. LurEocriNcTA. 
D. luteocincta, M. Sars, Bidr. til Kundsk. Chr. Faun. ii. p. 77 
(1870). 
Hab. Scandinavian coast {Vallo). 
21. L. EcHINATA. 
D. echinata, Lovén, Ind. Moll. Lit. Seand. &c. p. 5 (1846). 
“«? D. affinis A. & H.,” Lovén. 
Hab, West Scandinavian shores (Boh). 
» Messrs. Alder and Hancock showed that the Viliersia seutigera of D’Orbigny 
was closely allied to, if not identical with, L. depressa, and that the generic cha- 
racters were based upon erroneous observations —a view since confirmed by M, 
Fischer. Notwithstanding this, the genus ‘‘V7i/liersia,” like “Onchidoris,” still 
finds a place in our text-books. - 
15 
