O.V MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. COO 



Dr. Cooper's second paper " On New or E,are Mollusca inhabiting the Coa^t 

 of California," in the Proc. Cal. Ac. N. S., Aug. 17, 18G3, contains (English) 

 descriptions of the following species. He observes that •' Saidtt Barbara and 

 ^anta Barbara Island are very diiferent 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. 



67. Aplysia Californica, Cp. ; 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. Kararchtis, Cp. Pr. Cal. Ac, Apr. 1863. 



„ Navarchus inermis, Cp.,= Strategus i., Cp., anted. Catalina Island, 10 fnis., 



in seaweed. 1 specimen. 

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



Island, rocks, 1. w. 

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

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

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



Doris, typical." 



59. Triopa Catalince\, Cp. 4 sp., on algte among rocks, 1. w. Catalina Is'and. 



ff De)idronoU(s iris, Cp. Several sp. thrown on beach by storm, Santa l>arbara; 



1 sp. dredged on seaweed, 28 fm. Very variable in colour. ':' = '^D('tuIro/to~ 



tus, sp.," (ild., E. E. Moll. 

 „ JEolis Barharensis, Cp. 1 sp., 16 fm., rocky bottom, Santa Barbara. 



60. FlaheUina opalescens,C]).,=A!^olis o.,C'p., anted. With the last: also shore 



of Santa Barbara Island, rare. 

 „ Plndania iodinea, Cp.,=v£'ofe i., Cp., anted. Santa Barbara, beach, 1 sp. 

 „ Chiormra leonina, Gld. 1 sp., in 20 fm. Santa Bai'bara. 



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

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

 with " myriads of Helix Kellettii [ = 11. Tryoni, v. note *, p. 116], and two 

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

 hjs the mantle of Limax, dentition of Helicidce, and shell resembling JJaude- 

 hardia and Homaloni/.v \_=:Omalonyx, D'Oi'b.]. 

 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 

 Ciimingian Collection. 



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



living. '■'■ = 11. Kellettii, Cp., p. 63." 

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

 to H. intercisa, and very variable." 



117. Helix rtifocincta, Newc. Catalina Island, a3stivating under stones; rare. 



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

 nearly closed. 

 „ Helix Gabhii,'^ ewe. San Clemente Isl. 1 s-jp., like H. facta. 



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



rare. Somewhat like H. Rothi. 

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

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

 //. driatella. 



* Molluscs, as well as trees, assume giant proportioTis in California : e. g. ScMsotLarui 

 (with sipiions) 16 in., Amusiiim 8 in., Lunatia (crawling) 16 in., Mt/cdus 'J in., itc. 

 + Tide note t, p. 604. 



186a. 35 



