630 REPORT 1863. 



No. 



9. Helix striatella, Anth. With H. arborea, J. G. C. From Canada E. to Kansas, 

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



10. Succinea rusticana, Gld. " Rocky Mountains of Bitter Root Valley, 2500- 



4500 ft," J. G. C. 



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



above the Falls. [=Z. paliistris, auct] 



12. Limntea humilis, Say. Hell-Gate River. 



13. Limneea bulimoides, Linn. [Binney]. Missouri River, above the Falls. 



14. Limneea desidiosa, Say. Missouri River, above the Falls. 



15. Physa hypnorum, Linn. Hell-Gate River. 



16. Physa heterostropha, Say. Hell-Gate River ; Missouri River, above the Falls, 



17. Planorlis trivolvis, Say. Hell-Gate River. 



18. Planorbis ?parvtts, Say. Hell-Gate River. 



19. Ancylus, sp. ind. 



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



21. Leptoxis, sp. ind. 



22. Amnicola, sp. ind. 



23. Sphcerium [ Cyclas] occidentals, Prime. Hell-Gate River. 



24. Sphcerium [ Cyclas\ striatinum, Lam. Missouri River, above the Falls. 



25. Unio luteoluSj Lam. 



26. Margariiana margaritifera, Linn. Missouri River, above the Falls ; also Spokan 



River, below Lake Cceur d'Alene,=-4./a/c#Ms, 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. 

 Nat. So. Philadelphia/ 1861, pp. 331-333, and are as follows, outline-figures 

 being given of the new species : 



No. 



1. Helix areolata, Sby. Cerros Is., Dr. Veatch. 



2. Helix Pandorce, Fbs. Margarita Is. (Binney). 



3. Bulimus excelsus, Gld. La Paz. (Mus. Cal. Acad. N. S.) 



4. Bulimus vesicalis, Gld. Lower California. [Altered in < Otia/ p. 184, to B. 



sufflatus', nom. preoc.] 



5. Bulimm pallidior, Sby.^vegetus, Gld. With B. incendem, v. infra. (S. Ame- 



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



6. Bulimus proteus, Brod. One large and many young specimens ; Cape St. Lucas, 



Xantm. (Mountains of Peru, teste Pfeiffer.) [C. S. L., no. 167.] 



7. Bulimus Xantusi, n.s. Promontory of St. Lucas. 4 sp. Xantus. [No. 168.1. 



8. Bulimus artemisia, n.s. Promontory of St. Lucas. 1 sp., on small species of 



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



9. Bulimus jnlula } n.s. Todos Santos Mission and Margarita Is., in rocky spots 



under mosses, not uncommon, Xantus. Resembles B.sujflatus,jun. [No. 170.] 



10. Bulimus incendens, n.s. In great numbers with B. pallidior, Sby., 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. Pedipes lirata, Binn. Cape St. Lucas, Xantus. [C. S. L., no. 172.] 



116 



