138 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



ranging from Unalaska to the south of California. Of these, T. 

 catcdincB is very inadequately described, and, on the one hand, it 

 may not belong to the genus or, on the other, it may be one of the 

 species described subsequently. It is here included for the sake of 

 completeness in the following list of the known members of the 

 genus : — 



Genus Triopha, Bergh, 1880. 



Species : T. aurantiaca, Cockerell, 1908 (synonyms : Triopha sp.? 

 Cockerell & Eliot, 1905 ; T. elioti, 

 O'Donoghue, 1921). 

 T. carpenteri, Stearns, 1873. 

 T. catalincB, Cooper, 1863. 

 T. grandis, MacFarland, 1905. 

 T. maculata, MacFarland, 1905. 

 T. modesta, Bergh, 1880. 

 T. scrippsiana, Cockerell, 1915, 

 List op References. 



1. Abraham, P. S., " Revision of the Anthobranchiate MoUusca, with Descrip- 

 tions or Notices of forty-one hitherto undescribed Species" : Proc. Zool. Soc, 

 1877, pp. 196-267. 



2. Bergh, R., " On the Nudibranchiate Gasteropod MoUusca of the North 

 Pacific Ocean, with special reference to those of Alaska. Pt. II " : Proc. Acad. 

 Nat. Sci. Philad., 1880, pt. i. 



3. Ibid., "Die Opisthobranchien " from "Reports on the Dredging 

 Operations o£E the West Coast of Mexico, and in the Gulf of Cahfornia in charge 

 of Alexander Agassiz carried on by the U.S. Fish Commission Steamer 

 ' Albatross ' during 1891 " : Bull. Mus. Comp. Zool. Harvard, vol. xxv, 

 October, 1894. 



4. Cockerell, T. D. A., " The Nudibranch-Genus Triopha in California ' 

 Journ. Ent. and Zool. Claremont, vol. vii, No. 4, 1915. 



5. Ibid., " The MoUusca of La JoUa, Cahfornia " : Nautilus, vol. xxi, No. 9, 

 1908, p. 106. 



6. Cockerell, T. D. A., and Eliot, C, " Notes on a Collection of Californian 

 Nudibranchs " : Journ. Malacol., vol. xii, pt. iii, 1905. 



7. Cooper, J. G., " On New or Rare MoUusca inhabiting the Coast of 

 Cahfornia. No. II " : Proc. Californian Acad. Nat. Sci., vol. vi, pt. i, 1863. 



8. MacFarland, F. M., " A Prehminary Account of the Dorididse of Monterey 

 Bay, California " : Proc. Biol. Soc. Washington, vol. xviii, 1905. 



9. Ibid., " Opisthobranchiate MoUusca from Monterey Bay, Cahfornia and 

 Vicinity " : Bull. Bureau Fisheries, Washington, vol. xxv, 1906. 



10. O'Donoghue, C. H., " Nudibranchiate MoUusca from the Vancouver 

 Island Region " : Trans. Roy. Canadian Inst., vol. xiii, 1921. 



11. Ibid., "Notes on the Nudibranchiate MoUusca from the Vancouver 

 Island Region. III. Records of Species and Distribution " : Trans. Roy. 

 Canadian Inst., vol. xiv, pt. i. 



12. Stearns, R. E. C, " Descriptions of a New Genus and Two New Species 

 of Nudibranchiate MoUusks from the Coast of California " : Proc. Cahf. Acad. 

 Sci., V, 1873. 



III. On Flabellina (^Eolis) iodinea. Cooper, and on 



Thecacera velox, Cockerell. 



A. On Flabellina {^olis) iodinea, Cooper. 



In 1862 Cooper (5, p. 205) described briefly a species of Nudibranch 



from San Diego, which he termed Molis {Fhidiana ?) iodinea, noting 



