Hartland, Vermont, rare. Canada, to the mountains of South 

 Carolina; Alaska, to Berkeley, Cal. 



This appears in literature under the generic names of Buli- 

 mus, Zua, Ferussacia, Helix, Achatina, and Cochlicopa — the last 

 the name now accepted. 



24 Pupa pentodon Say 



Hartland, Vermont, common. Georgia; Missisippi; Montana. 



25 Pupa armifera Say 



Hartland, Vermont, rare. All eastern U. S., Montana. 



26 Pupa fallax 



Hartland, Vermont, rare. South Carolina; Nebraska; Texas. 



27 Pupa contracta 



Hartland, Vermont, common. All eastern U. S. 



28 Vertigo ovata 



Ovate conical, ventricose, apex conical, whorls 5, very convex, 

 with deep suture; aperture half round, truncate above, lip in- 

 curved within and reflected, marked externally by a groove, outer 

 lip incurved in the middle; teeth 6-8, a large sharp one and a 

 small one on the parietal wall, 2 on the columellar margin, one 

 of them at its base, and 2 on the labrum, one of which is also 

 basal; umbilicus open; color dark amber, shining; length 1.8, 

 diameter 1 mm. 



Hartland, Vermont, common. All America. Found by the 

 writer in the Cantillas canyon, Baja California. 



29 Vertigo milium 



Hartland, Vermont, common. Texas. 



30 Vertigo tsollesiana 



Hartland, Vermont, rare. Virginia. 



31 Vertigo simplex 



Hartland, Vermont, rare. Canada. 



32 Succinea obliqua 



Hartland, Vermont, common. Georgia; Arkansas. 



33 Physa ancillaria 



Connecticut river, Hartland, Vermont, abundant. Louisiana. 



34 Physa heterostropha 



Hartland, Vermont, abundant. All North America. 



35 Bulinus hypnorum 



Slender, translucent, highly polished; whorls 5-7; apex appar- 

 ently acute, but when closely examined, found to be convex; aper- 

 ture narrow, obtusely rounded anteriorlv, acute posteriorlv; lip 

 scarcely apparent; columellar fold very slight; color o^hre-yellow 

 or light yellowish-brown, sometimes presenting violet and green 

 prismatic reflexions; length 13, diameter 6 mm. 



Abundant in a stagnant pond, often dry, in the woods on my 

 father's farm, Hartland, Vermont. Common to Europe, Asia, and 

 the northern portion of North America. Alaslra to Utah. 



This is one of the species that is a puzzle to systemists, having 

 been given various generic names, for instance Bulla, Physa, 



