154 Transactions of the Royal Canadian Institute 



and continued down as a short pointed process. Its edge bears a series 

 of polygonal plates and a few rows of short tiny papilliform denticles. 

 Altogether it constitutes a most powerful masticatory apparatus. The 

 penis is short and sub-conical. 



This species was first described by Bergh (3) from specimens obtained 

 from the coast of Southern California in from 43-48 fathoms, he also gives 

 a satisfactory account of its internal anatomy. 



iiahitat. — Unfortunately precise data as to the locality and depth 

 from which the two larger specimens examined here were obtained is 

 lacking. They came from somewhere near Departure Bay and were 

 obtained by dredging. Three smaller specimens were dredged by Pro- 

 fessor McMurrich on Swiftsure Shoal in 23 fathoms. 



Family Dorididae Cryptobranchiatae. 



Branchiae retractile into permanent pocket. Two spermatothecas. 



Genus Archidoris (Bergh). 

 Doris, auct. 



Archidoris Bergh, Malacologische Untersuchungen (Semper, Reisen im 

 Archipel der Philippinen, II, Bd. Ill), H. XIV, 1878; p. 616. Supple- 

 ment-Heft I, 1880, p. 33; H. XVIII, 1892, p. 1092. Nudibranchiate 

 Gasteropod Mollusca of the North Pacific Ocean, I, Proc. Acad. Nat. 

 Sci. Phila; 1879, p. 106. Report on the Nudibranchiata, Challenger 

 Reports, Zoology, X, 1884, p. 84. System der Nudibranchiaten 

 Gasteropoden, p. 100, 1892. Die Opisthobranchien (Albatross 

 Expedition), Bull. Mus. Comp. Zool., XXV, 1894, io> P- I57- 

 Body not hard, subdepressed, notaeum granular or tubercular; 

 tentacles short, thick, with external longitudinal sulcus; branchial plumes 

 not numerous 3-4 pinnate; the foot wide, its anterior margin superficially 

 sulcate. Labial armature none. Rhachis of radula naked, pleurae 

 multidentate, teeth hooked. Penis unarmed. Vagina unarmed. 



Archidoris montereyensis (Cooper). 



Doris montereyensis Cooper, Proc. Cal. Ac. Sci. II, 1862, p. 204. Proc. 

 Cal. Ac. Sci. Ill, 1863, p. 158. 



Archidoris montereyensis Bergh. Mai Unters, H. XIV, 1878, p. 624. 

 Nudibr. Moll. North Pac. Ocean, Proc. Ac. Nat. Sci. Phila., 1879, 

 p. 107, and Syst. der Nudibr. Gast., 1892, p. 100. MacFarland, 

 Proc. Biol. Soc, Washington, XVIII, Feb. 1905, p. 37. Bull. Bur. 

 Fisheries, Washington, Vol. XXV, 1905, p. 1 14, pi. XXIII. Cockerell 

 and Eliot, Jour, Malac, Vol. XII, 1905, p. 34. 

 Body. — The body is a somewhat elongated elipse with the ends about 



