Notice of Land and Freshwater Shells. 367 



ITewcomb !), also from Oregon City, and Whidby's Island, 

 W. T. 



It is found on the Pacific coast from Paget Sound to San 

 Diego, Lower California. 



Helix strigosa Goidd Proc. Post. Soc. IST. H. ii. 166. 



This si3ecies was brought by the U. S. Exploring Expedition 

 from the interior of Oregon. 



Dr. Cooper found it in Washington Territory " on the Rocky 

 Mountains by the Bitter Root River, at an elevation of 4000 

 feet, sestivating under logs of pine, on a steep slope of shale 

 containing lime in veins." 



The shells collected by Dr. Cooj)er are of smaller dimensions 

 than those given by Gould, the former measure diam. maj. 19, 

 min. 17, alt. 7 mill. The outer whorl is more carinated, with 

 a more distinct I'eddish brown band above, and also below the 

 periphery. In some the penultimate whorl shows at the suture 

 its acutely carinated edge, excavated near the margin, and with 

 an' impressed line, as in H. Oumherlandiana Lea. The some- 

 what distant spiral lines at the base, intersecting the incremental 

 strige, produce a semi-granulated appearance. In old examples 

 the margins of the peristome are joined by a parietal callous 

 deposit. 



This species also occurs in the Big Horn Mountains, in 

 Nebraska, and on the Rio Piedra, in W. JSTew Mexico. 



One specimen reached us with the animal alive ; kept in a 

 glass vessel with moist grass, it deposited six young shells, each 

 having 2-2i whorls. The species is, it would seem, viviparous. 



Helix Cooperi W. G. Binney Proc. Acad. N. S. Phila. 1858, 

 p. 115. 



Mr. Binney described this from specimens found by Dr. F. 

 Y. Hayden (Yellow Stone River Expl. Exped.), among the 

 Black Hills of Nebraska. "We can refer only to this a number 



JUNE, 1861. 25 -^N. Lyo. Nat. Hist. Vol. VII. 



