FAMILY HELICID^E 23 



Range. Europe ; North Africa, southern and western Siberia 

 to the Amur ; Madeira ; the Azores ; eastern North America from 

 Manitoba to Florida and Montana to Nova Scotia. 



Manitoba, at Winnipeg and Pembina ; north to the Saskatchewan 

 (Richardson). Introduced? in Calif ornia. 



Although Risso's figure of V. rosalia represents a perfectly smooth 

 shell, his diagnosis calls for one with elevated lamella? ; it is probable 

 therefore that he regarded the present species and V. costata as varie- 

 ties of a single species. 



Vallonia costata Miiller. 



Helix costata MULLER, Verm. Terr., n, p. 31, 1774. 

 Helix crenella MONTAGU, Test. Brit., I, p. 441, pi. xiii, fig. 3, 1804. 

 Helix pulchella var. ROSSMASSLER, vii, p. 6, fig. 439, 1838. FERUSSAC, 

 Hist., pi. LXIX E, figs. 15-17, 1821. 



Range. With V. pulchella in Europe and Asia ; in America in 

 the northern States and northward from Kansas and Colorado. 



Manitoba (Hanham). 



This species has been so constantly confused with the other costate 

 species and with V. pulchella that it is hardly practicable to determine 

 its true range from the literature. 



Vallonia gracilicosta Reinhardt. 



Vallonia gracilicosta REINHARDT, Sitz. Ber. der Ges. Naturf. Freunde zu Ber- 

 lin, 1883, No. 3, p. 42. Little Missouri. 



Range. Rocky Mountain region, westward and northward from 

 the upper Missouri. 



Manitoba, at Winnipeg; in Alberta at Laggan. Red Deer Olds and 

 McLeod. 



Easily recognized by its very prominent, not crowded, very oblique 

 lamellae . 



Vallonia albula Sterki. 



Vallonia albula STERKI, Proc. Acad. Nat. Sci. Phila., 1893, p. 263, pi. vm, 

 figs. D, o ; Nautilus, ix, p. 17, May, 1895. 



Range. Eastern Canada to British Columbia. 

 Quebec ; Manitoba ; Vancouver Island. 



Vallonia asiatica Nevill. 



Helix costata var. asiatica NEVILL, Sci. Results 2d Yarkand Mission, p. 4, 



No. 7, 1877. 

 Vallonia asiatica REINHARDT, Sitz. Ber. der Ges. Naturf. Freunde zu Berlin, 



1883, No. 3, p. 42. 



Range. Central Asia, Tibet. Alaska. 



