630 REPORT—1868. 
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 :— 
ll. Limnea fragilis [as of] Linn.[Binney]. Hell-Gate River; Missouri River, 
above the Falls. [=L. palustris, auct. | 
12. Limnea humilis, Say. Hell-Gate River. 
13. Limnea bulimoides, Linn. [Binney]. Missouri River, above the Falls. 
14. Limnea 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. Planorbis trivolwis, Say. Hell-Gate River. 
18. Planorbis ?parvus, Say. Hell-Gate River. 
19. Aneylus, sp. ind. 
20. Melania plicifera, Lea. Hell-Gate River. 
21. Leptoxis, sp. ind. 
22. Amanicola, sp. ind. 
23. Spherium { Cyclas| occidentale, Prime. Hell-Gate River. 
24. Spherium | cia striatinum, Lam. Missouri River, above the Falls. 
25. Unio luteolus, Lam. 
26. Margaritana margaritifera, Linn. Missouri River, above the Falls; also Spokan 
River, below Lake Coeur d’Aléne,= A. 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 Glandine 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. Se. 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 Pandore, 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. 
suffiatus ; nom. preoe. | 
5. Bulimus pallidior, Sby.,=vegetus, Gld. With B. incendens, y.infra. (S. Ame- 
rica, Cuming.) [Cape St. Lucas List, no. 166. ] 
6. Bulimus proteus, Brod. One large and many young specimens; Cape St. Lucas, 
Xantus. (Mountains of Peru, teste Efeiffer.) C. 8. L., no. 167. ‘ 
7. Bulimus Xantusi,n.s. Promontory of St. Lucas. 4 sp. Xantus. [No. 168.] 
8. Bulimus artemisia,n.s. Promontory of St. Lucas. 1 sp., on small species of 
Artemisia; Xantus. [C. 8. L., no. 169.] 
9. Bulimus pilula, u.s. Todos Santos Mission and Margarita Is.,in rocky spots 
under mosses, not uncommon, Xantus. Resembles B. sufflatus, jun. [ No. 170. ] 
Bulimus incendens, 1.8. In great numbers with B. pallidior, Sby., climbing 
high “ copal” or copaiva trees, on dry hills 800-1000 ft. high ; ei St. 
Lucas, Margarita Bay, Xantus. Resembles B. excelsus,Gld. [No. 171.] 
- Pedipes irata, Binn. Cape St. Lucas, Xantus. [C. 8. L., no. 172.] ,, 
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