ON MOLLUSCA OF THE WEST COAST OF NOETH AMERICA. 09 



Dr. Cooper's second paper " On New or Rare Mollusca inhabiting the Coast 

 of California," in the Proc. Cal. Ac. N. S., Aug. 17, 1863, contains (English) 

 descriptions of the following species. He observes that " Santa Barbara and 

 tianta Barbara Island are very different in the groups of animals inhabiting 

 them, although the island is only thirty-five miles from the mainland. 

 Catatina Island is twenty-four miles from the mainland, and the molluscs 

 are very different from both the mainland and the other islands, being the 

 richest locality on our shores." 



Page. 



57. Aplysia Calif ornica, Cp. ; for which is constituted a subgemis, Neaplysia ; 15 

 inches by 5*. Three specimens j San Pedro beach, after storm j stomach full 

 of algae. Fig. 14. 



68. NacarchiWf Cp. Pr. Cal. Ac., Apr. 1863. 



Navarclms inermis, Cp.,= Strategus i., Cp., anted. Catalina Island, 10 fms., 



in seaweed. 1 specimen. 

 Doris albopunctata, Cp. Santa Barbara, 20 fm., rocky bottom. Catalina 



Island, rocks, 1. w. 



Doris Monterey ensis, Cp. Santa Barbara Island, rocks, 1. w. 

 Doris sanguined, Cp. 4 sp. with the last. " Stellate structure not discovered." 

 Doris Sandiegensisy Cp. 2 sp., with the last. " All these species belong to 



Doris, typical." 



69. Triopa Catalince^, Cp. 4 sp., on algae among rocks, 1. w. Catalina Island. 



Dendronotus iris, Cp. Several sp. thrown on beach by storm, Santa Barbara; 

 1 sp. dredged on seaweed, 28 fm. Verv variable in colour. ? "Dendrono- 

 tus, sp.," aid., E. E. Moll. 



sEolis fiarbarensis, Cp. 1 sp., 16 fm., rocky bottom, Santa Barbara. 

 CO. Flabettina opaleseens, Cip.,=sEolis o., Cp., antea. "With the last: also shore 

 of Santa Barbara Island, rare. 



Phidania iodinca, G]).,=JEolis i., Cp., anted. Santa Barbara, beach, 1 sp. 



Chiorcera leonina, Gld. 1 sp., in 20 fm. Santa Barbara. 



Sept. 7th, 1863. Dr. Cooper described a very interesting new genus of 

 Pulmonates, only found at the head of one ravine in Santa Barbara Island, 

 with " myriads of Helix Kellettii [ = #. Tryoni, v. note *, p. 116], and two 

 other species, probably new." Full particulars of its habits are given. It 

 has the mantle of Limax, dentition of Heliddce, and shell resembling Daude- 

 bardia and Homalony.v \_ = 0malonyx, D'Orb.]. 

 62, 63. Binneya notabilis, Cp. 3 living and 18 dead shells. Fig. 15 (five views). 



Jan. 18th, 1864. The remaining land-shells of the Survey were described 

 (with Latin diagnoses) by Dr. Newcomb, in a paper communicated to the 

 Academy by Dr. Cooper. Specimens of many of them will be found in the 

 Cumingian Collection. 



116. ILlix Tryoni, Newc. Santa Barbara and S. Nicholas Islands, abundant ; 



living. " = H. Kellettii, Cp., p. 63." 



Helix crebristriata, Newc. San Clemente Island ; abundant. " Closely allied 

 to JFL intercisa, and very variable." 



117. Helix rufocincta, Newc. Catalina Island, asstivating under stones; rare. 



S. Diego ; 1 dead sp. Outline like H. Pytyonesica : umbilicus open or 

 nearly closed. 

 Helix Gabbii, Newc. San Clemente Isl. 1 sp., like H. facia. 



118. Helix facta, Newc. Santa Barbara Isl., very common San Nicholas Isl., 



rare. Somewhat like H. Rothi. 



Helix Whitneyi, Newc. Near Lake Taho, Sierra Nevada, 6100 feet high. 

 3 sp. under bark, near stream, with H. Breweri and H. chersina. Resembles 

 H. driatella. 



* Molluscs, as well as trees, assume giant proportions in California : e. g. Schizotkcerus 

 (with siphons) 16 in., Amusium 8 in., Lunatia (crawling) 10 in., Mytilus 9 in., &c. 

 t Vide note t, p. 604. 



1863. 



