OV MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. G27 



vnriafions of form in large numbers of individuals, but by the discovery of 

 several new species and the addition to the district-fauna of many others. 

 The duplicates are made-up in series for distribution by the Smithsonian 

 Institution ; and, though of the worst quality from a " collector's " point of 

 view, they will be found very serviceable by real students, being carefully 

 named in accordance with this Report. He has now received a dredge, con- 

 structed for him by Dr. Stimpson; and if he succeeds in training the young 

 Indians to use it, there is little doubt that a rich harvest of fresh materials 

 will shortly be obtained. Some of the collections were made on the neigh- 

 bouring shores of Vancouver's Island, among Avhich was a large series of 

 P,tchi/poma ffihherositm, Chem., with attached Blvonia, Doth of an essentiallj'' 

 Eastern Pacific type, the former having been brought from Japan by Mr. A. 

 Adams. The Indians have taken a fancy to the opercula of this shell for the 

 purpose of ornamenting their canoes. As it is an article of trade among 

 themselves, it is remarkable that so large a shell should have so long esca]X'd 

 the notice of collectors. Dead specimens have been washed-up in California; 

 but it is not known even to enter the Straits of De Faca alive. The shore- 

 pickings of the Indian children, which have already added 25 species to 

 science, are singularly free irom ballast-importations, although they present 

 a few (supposed) extra-limital shells, probably washed-up by the ocean 

 currents. The following are the species new to the Vancouver fauna ; the 

 remainder will be found tabulated in the 7th column of the general Table, 

 par. 112, infra. 



ISO. 



1. JValrUteinn'a Corennica, valves. 



2. Xt/Iotrya pennatifera, teste Jeffr. 



3. Clidiopliora punctata, one worn valve. 



4. MucoDia ?ede)itidn. Two living shells may be the young of this species, or an. 



extreme var. of inquinnta. 



5. Mfera salmonea. Plentiful. 



6. Aiu/uliis variegattis. Rare. 



7. Semele ruhroUneata. One large valve may belong to this species, or (more 



probably) be distinct and new. 



8. Sfandelln ? CaUfoniica. Oxxq young valve. 



9. 3Iicidon prolo)ir/fltiis,-n. si\ho;.,Ti.s. Several valves of this curious shell, inter- 



mediate between Lncina and Venericardia, accord with forms not before 

 eliminated, from the Coralline Crag and Inferior Oolite. 



10. Laznrin siihquadrata. One valve. 



11. Diplodonta urhella. Very large valves. 



12. Kellla (\av.) Ckironii. A few valves. 



13. Adida sti/lma. Plentiful. 



14. Axi'iKpa {? septentrioiialis, var.) stibob'^olefn. Numerous valve.". 



15. Siphonaria Thersites, n. s. Rare, dead. Like tristensis and other Cape Horn and 



N. Zealand types. The genus was not known north of Margarita Bay. 



16. Mopalia {Kennerle.yi, var.) Swannii. One sp. and valves. 



17. Ischnochifon (Trachydermon) Nuttallii. One sp. 



18. HaUotis Kandschatkana. Rare. 



19. Pachi/poma f/ibherosum, Chem. Living ; plentiful. 



20. Lepfo/n/.i: sanf/uineiis, Linn. Very plentiful. (Japan, A. Ad. ; = Homahpom^ 



san(/uinei<m, antea p. 588 (nom. preoc.) ; Mediterranean, Fhiltppi.) 



21. CJilorodoma funebrale (et var. sitbapertum. One sp.). 



22. Calliostoma canaliculatum. Living ; abundant. 



23. Margarita cidaris, n. s. One fresh specimen, with aspect of Turcica. 



24. Marr/arita hdicina. Very rare. 



25. Gibbida parcipicta. One sp. 

 2ti. Gihbida svccincta, n. s. Rare. 

 27. Gdjhida lacunata,n. %. One sp. 



8 113 



