ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 609 
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 
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. 
87. Aplysia Cakifornica, Cp.; for which is constituted a subgenus, Neaplysia; 15 
inches by 5*. Three specimens; San Pedro beach, after storm ; stomach full 
of alge. Fig. 14. 
58. Navarchus, Cp. Pr. Cal. Ac., Apr. 1863. 
» Navarchus inermis, Cp.,= Strategus t., 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 Montereyensis, 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 Cataline}+, Cp. 4 sp., on algee among rocks,1.w. Catalina Island. 
3, Dendronotus iris, Cp. Several sp. thrown on beach by storm, Santa Barbara; 
1 sp. dredged on seaweed, 28fm. Very variable in colour. ? =“ Dendrono- 
tus, sp.,” Gld., H. E. Moll. 
» Holis Barbarensis, Cp. 1 sp., 16fm., rocky bottom, Santa Barbara. 
60. Fabellina opalescens, Cp.,= A®olis 0., Cp., antea. With the last: also shore 
of Santa Barbara Island, rare. 
» Phidania todinea, Cp.,= Holis t., Cp., antea. Santa Barbara, beach, 1 sp. 
»  Chiorera leonina,Gld. 1sp.,in 20fm. 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 [=H. Tryoni, v. note *, p. 116], and two 
other species, probably new.” Full particulars of its habits are given. It 
has the mantle of Zima, dentition of Helicide, and shell resembling Daude- 
bardia and Homalonyx [= Omalonyx, 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. Helix Tryoni, Newe. Santa Barbara and 8. Nicholas Islands,’ abundant ; 
living. “= H. Kellettii, Cp., p. 63.” 
» Helix crebristriata,Newc. San Clemente Island; abundant. “ Closely allied 
to H. intercisa, and very variable.” 
117. Helix rufocincta, Newe. Catalina Island, eestivating under stones; rare. 
8. Diego; 1 dead sp. Outline like H. Pytyonesica: umbilicus open or 
nearly closed. 
» Helix Gabbii, Newe. San Clemente Isl. 1 sp., like H. facta. 
118, Helix facta, Newe. Santa Barbara Isl., very common; San Nicholas Isl., 
rare. Somewhat like H. Rothe. 
» Helix Whitneyi, Newc. Near Lake Taho, Sierra Nevada, 6100 feet high. 
3 sp. under bark, near stream, with H. Breweri and H. chersina. Resembles 
A. striatella. 
* Molluscs, as well as trees, assume giant proportions in California: e. g. Schizotkerus 
(with siphohs) 16 in., Amusiwm 8 in., Lunatia (crawling) 16 in., Mytilus 9 in., &e. 
T Vide note Tt, p. 604. 
63. 2R 
