OS MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. C09 



Dr. Cooper's second paper " On New or Eare Mollusoa inhabiting the Coast 

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

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

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

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

 Catalina 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 Califomica, Op. ; for which is constituted a subgenus, Neaplysia ; 15 



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



of algas. Fig. 14. 

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

 „ Kavarchus inermis, Cp.,^= Stratefftcs i., Cp., antedi. Catalina Island, 10 fms., 



in seaweed. 1 specimen. 

 „ Doris albopimctala, Cp. Santa Barbara, 20 fm., rocky bottom. Catalina 



island, rocks, 1. w. 

 „ Doris Montereyensis, Cp. Santa Barbara Island, rocks, 1. w. 

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

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



Doris, typical." 

 59. Triopa Catalints'f , Cp. 4 sp., on algae among rocks, 1. w. Catalina Island. 

 „ Dendronottts iris, Cp. Several sp. thrown on beach by stoi-m, Santa Barbara; 



1 sp. di-edged on seaweed, 28 fra. Very variable in colour. i = "Dendrono- 



iits, sp.," Lrld., E.E. Moll. 

 ,, JEolis Barbarensis, Gf. 1 sp., 16 fm., rocky bottom, Santa Barbara. 

 CJ. FlabeUina opalescem, C^.,=:JEolis o., Cp., anted. With the last : also shore 



of Santa Barbara Island, rare. 

 „ Phidania iodinea, C-p.,=JEolis i., Cp., ardea. Santa Barbara, beach, 1 sp. 

 „ Chiorara 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 Kelhttii [=ir. Tryoni, v. note *, p. 116], and two 

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

 has the mantle of Limax, dentition of Helicidce, and shell resembliag Davde- 

 bardia and Homalonyx [^Omalonyx, D'Orb.]. 

 62,63. Binneya notabUis, Q^. 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 wiU be found in the 

 Cumingian Collection. 



116. Hclijc Tnjoni, Newc. Santa Barbara and S. Nicholas Islands, abundant ; 



living. ''=H. KeUettii, Cp., p. 63." 

 „ Helix crebristriata,i^ ewe. San Clemente Island ; abundant. " Closely allied 

 to H. intereisa, and veiy variable." 



117. Helix rufocincta, Newc. CataUna Island, sestivating under stones; rare. 



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

 nearly closed. 

 „ Helix Oabbii, Newc. San Clemente Isl. 1 sp., like H. facta. 



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



rare. Somewhat like H. Mothi. 

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



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



H, ttriatella. 

 * Molluscs, as well as trees, assume giant proportions in California : c. g. Schisothcerua 

 (with siphons) 16 in., Amusium 8 in., Lunatia (craivling) 16 in., Mi/iilus 9 m., &c. 

 t Tide note t, p. 604. 



1863. 95 



