140 PROCEEDINGS OP THE MALACOLOGICAL SOCIETY. 



Doris pennigera. This is the form referred to by Cockerell, and there 

 seems little doubt that the specimen he describes is referable to the 

 genus of which T. pennigera is the type. It stands, therefore : — 



Genus Thecacera, Fleming, 1828. 



Species Thecacera velox, Cockerell, 1901. 



List of References. 



1. Bergh, E,., " Beitr. zur Kenntn. d. ^olidiaden " : Verh. k.k. Zool.-Bot. 

 Gesell. Wien, vol. xxiii, 1873, p. 615. 



2. Ibid., " On the Nudibranchiate Gasteropod Mollusca of the North Pacific 

 Ocean, with special reference to those of Alaska. Pt. I " : Proc. Acad. Nat. 

 Sci. Philad., 1879, pt. i. 



3. Cockerell, T. J). A., " Notes on Two California Nudibranchs " : Journ. 

 Malacol., vol. iii. No. 4, December, 1901. 



4. Ibid., " Mollusca of La JoUa, California " : Nautilus, vol. xxi, No. 9, 

 1908, p. 106. 



5. Cooper, J. G., " Some new genera and species of California Mollusca " : 

 Proc. Calif. Acad. Nat. Sci., vol. ii, 1862. 



6. Ibid., " On New or Rare Mollusca inhabiting the Coast of California. 

 No. II " : Proc. Calif. Acad. Nat. Sci., vol. iii, pt. i, 1863. 



7. Cuvier, Regne Animal., ed. 2, vol. viii, 1830, p. 35. 



8. Fleming, J., " A History of British Animals," 1828. 



9. Montagu, " Descriptions of several Marine Animals found on the South 

 Coast of Devonshire " : Trans. Linn. Soc, vol. ii, 1807, p. 17. 



IV. On Janolus (iEoLis) barbarensis, Cooper, and on the 



.^OLIDIA HERCULEA OF BeRGH. 



A. On Janolus [JEolis] harharensis, Cooper. 



Cooper in 1863 (5, pp. 59 and 60) describes a nudibranch from 

 Santa Barbara under the name Molis harharensis. Like most of his 

 descriptions this one is extremely brief, and hardly sufficient to 

 enable an accurate determination of its identity to be made. He 

 says : " Rose-red, longer tentacles tipped with yellow, branchial 

 cilise simple, in six longitudinal rows, all short, the middle rows 

 longest and tipped with blue, anterior tentacles small, above 

 the mouth, dorsal tentacles club-shaped, a white streak extending 

 from the median line between them to the mouth. Length nearly 

 an inch." 



Later, Cockerell and Eliot in 1905 (4, pp. 48-50) describe a form 

 from Dead Man's Island, San Pedro, giving it the name Janolus 

 cceruleopictus. The account was based upon a preserved specimen, 

 and the authors state that the rhinophores are " large, stout, almost 

 spherical ", which means that in the living condition and slightly 

 extended they would be close to Cooper's " dorsal tentacles club- 

 shaped ". The same authors also say : " the anterior end of the 

 animal somewhat distorted, but there appears to have been a fold 

 over the mouth with a distinct cylindrical tentacle on each side " ; 

 and, again, this seems to correspond with Cooper's " anterior 

 tentacles small, above the mouth ". Thus Cooper's form was 

 probably a Janolus. 



