2o6 Natural History Bulletin. 



York, Vermont, the Islands of the St. Lawrence, Nevada, and 

 Colorado. In the old world it ranges from Siberia to Sicilv. 



Pupa alticola, Ingersoll. ^'ery common. Fossils were 

 obtained from nearly all of the localities heretofore mentioned. 

 These vary but slightly in size. All of the sets contain the 

 longer specimens with enlarged and distorted body-whorl, and 

 greater number of whorls which characterize true Pupa 

 alticola. These are exactly like recent specimens from the 

 Yellowstone Park, and from MuUan, Montana. The younger 

 fossil (as well as recent) shells are not distinguishable from 

 Pupa edeiittila^ Drap. ( Vertigo si?nplex, Gld.) of which this 

 seems to be a variety. 



The younger fossils were compared with specimens of 

 Pupa cdentula from Ottawa and Ohio. Typical Pupa alticola 

 occurs at present in the Rocky Mountains from Colorado 

 and Utah to Montana. Pupa edoitula occurs from Ohio to 

 Canada and New England. 



Vertigo ovata, Say. Not uncommon. Fossils from Johilson 

 and Scott counties, Iowa; and Lancaster and Cuming coun- 

 ties, Nebraska were compared with recent specimens from 

 Vermont, Iowa, and Nebraska. Both the fossil and recent 

 shells show some variation, the fossils being on an average 

 somewhat smaller. This species is at present distributed 

 throughout the United States. 



Vertigo gouldii, (Binn.) Stimp. Rare. Fossils from Mus- 

 catine count}', Iowa are slightly larger than recent shells from 

 Iowa City, while those from Lancaster county, Nebraska are 

 about equal to them. Both sets of fossils are small. The 

 species occurs at present from Iowa to New England. 



Succinea ovalis, Gld. Rare. A small set of fossils from 

 Lancaster countv, Nebraska is made up of very young shells. 

 No satisfactory comparison could be made. 



The species is now foynd throughout the northern and mid- 

 dle portions of the United States. 



