AN EASTERN SPECIES. 1 47 



but it is horn-colored, has a thin and sharp lip, and 

 is about three-sixteenths of an inch in diameter. 



Patula Cronkheitei, Newcomb, is slightly larger 

 than the last, but is very similar, and may be but a 

 variety. From northern localities. 



Helix {Patula) solitaria, Say, sol-i-ta'-ri-a. This 

 species is essentially an eastern one, being partic- 

 ularly abundant near the Ohio river; nevertheless it 

 is found in Idaho, Oregon, and Washington Terri- 

 tory. The specimens before me were collected at 

 Walla Walla, Washington Territory. The shell is 

 low conical, has five whorls, a large, circular umbili- 

 cus, and a sharp outer lip. It is of a yellowish brown 

 color and the whorls are marked by two dark brown 

 bands with a lighter stripe between them. Its dia- 

 meter is three-fourths of an inch or more. 



Helix {Patula) asteriscus, Morse, as-te-ris'-cus. 

 This is a very small snail, being about one-sixteenth 

 of an inch in diameter. Spire low, whorls four, 

 umbilicus large, lip thin, whorls marked by many 

 minute, sharp cross ridges; color brown. Widely 

 distributed, the specimens studied having been col- 

 lected among grass roots at Bolinas, Cal. 



