r>30 REPORT— 18G3. 



No. 



9. Ileh'.r slrialeUn, Anth. With H. arhoren, J. G. C. From Cannda E. to Kansas, 



and from Pembina (Red River N.) to Virginia; teste llJaiul. 



10. Succinea nfsfrcaim, Gld. '' Rocky Mountains of Bitter Root Valley, 2500- 



4500 ft," J. G. a 



The freshwater shells collected on the Rocky Mountains by Dr. Cooper 

 were determined, with the assistance of Dr. Lea and of Messrs. Binney and 

 Prime, as follows : — 



11. Limrupa fragilis [as of] Linn. [Binney]. Hell-Gate River; Missouri River, 



above the Falls. [=i. pah'sfris, auct.] 



12. Liiiitiaa hinnih's, Say. Hell-Gate River. 



18. Liiniuea hdimnides, Linn. [Binneyl Missouri River, above the Falls. 



14. Limiifva de.ndit>sa, Say. iMissouri River, above the Falls. 



15. F/ii/sa hjipnonnn, Linn. Hell-Gate River. 



] 6. Plii/m lieterostropha, Say. Hell-Gate River ; Missouri River, above the Falls. 



1 7. Planorhis trivolvis, Say. Hell-ijate River, 



l.s. Planorbis fparvits, Say. Hell-Gate River. 



!'•>. Aiici/lus, sp. ind. 



20. Melania plicifera, Lea. Hell-Gate River. 



21. Leptoxis, sp. ind. 



22. Amnicola, sp. ind. 



28. Sphffrinm [ C)/cIas'] occideniale, Prime. Hell-Gate River. 



24. Sph(erium [ Ci/clasj striatinum, Lam. Missouri River, above the Falls. 



25. Unio luteolus, Lam. 



23. Marf/an'tana margaritifera, Linn. Missouri River, above the Falls ; also Spokan 



River, below Lake Coeur d'Alene,=^. falcatus, Gld. ; the purple var. hitherto 

 only found on the Pacific slope. 



109. The land-shells of the peninsula of California present points of great 

 interest to the student of geographical distribution. While those of the 

 eastern shore of the Gulf belong exclusively to the Mexican or Central Ame- 

 rican fauna, those of the western present in their general features that form 

 of the South American type which belongs to the region of the Andes. The 

 contrast between the Glandinae and painted Bulimids of Mazatlan, and the 

 small dull forms, or solid white shells of the peninsula, is evident even to the 

 superficial observer. They are catalogued by Mr. Binney in the ' Proc. Ac. 

 iS^it. Sc. Philadelphia,' 1861, pp. 331-333, and are as follows, outline-figures 

 being given of the new species : — 



"No. 



1. Helix areolafa, Shy. Cerros Is., Dr. Veaich. 



•2. JMix Pandor(e,¥hs. Margarita Is. (^wwey). 



3. Btdhmis excelmis, Gld. La Paz. (Mus. Cal. Acad. N. S.) 



4. Bidimns vesicalis, Gld. Lower California. [Altered in ' Otia,' p. 184, to B, 



.v/fflatus ; nom. preoc] 



5. Bulbmis pallidior, 'Shj., = re(/etns, Gld. With B. incendens, v. infra. (S. Ame- 



rica, Cioninf/.) [Cape St. Lucas List, no. 166.] 

 G. Buhmm profeits, Brod. One large and many young specimens; Cape St. Lucas, 

 Xnntus. (Mountains of Peru, teste Pfeiffer.) [C. S. L., no. 167.1 



7. Bnlimus Xnntust, n.s. Promontory of St. Lucas. 4 sp. * Xantits. [No. 168.] 



8. Bidimus m-temisia, n.s. Promontory of St. Lucas. 1 sp., on small species of 



Artemisia; Xantus. [C. S. L., no. 169.] 



9. Bidimus pilida, n.s. Todos Santos Mission and ^largarita Is., in roclcy spots 



under mosses, not uncommon, Xantus. Resembles B. sujficdus,]\\\\. [No. 1 70.] 



10. Bidimus incendens, n.s. In great numbers Avith B. jxdlidior, Shy., climbing 



high " copal " or copaiva trees, on dry hills 800-1000 ft. high ; Cape St. 

 Lucas, Margarita Bay, Xantus. Resembles B. excelsus, Gld. [No. 171.] 



11. Pedtpes liratttj Binn. Cape St. Lucas, Xantus. [C. S. L., no. 172.] 



116 



