272 PJROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. [ISSo. 



S. aurea Lea is found at Feinaiitliua, known by its narrow aperture 

 and rich deep color. S. obliqua Say, or a form closely allied to it, was 

 collected at Saint Augustine by Hemphill. 



LIMNOPHILA. 



Family Physid^. 



Physa heterostropha Say. 



Physa hvtrrostroplm Say, 1817, Binncy, L. aud F. W. Sli. N. Am., ii, p. 84, 1865. 



This universal species is so far the only one received by us from 

 Florida, where it is widely distributed. This and Planorhis trivolvis are 

 almost invariably found in the natural wells or sinks, but rarely any 

 other species. The young ones arc proportionally more elongated 

 than the adults, but there is not much variation among Florida speci- 

 mens, judged by those heretofore received. The Museum has it from 

 Palatka, Enterprise, Johnson's Sink, Alachua County, the Sulphur and 

 other springs at Tampa, and the marshes near Furguson's Pass, col- 

 lected by Stearns, Hemphill, and Dall. 



Family LiMNAEiDiE. 

 Limnaea colmnella Say. 



Linuwa cohnnella Say (1818), Binuey, 1. c, p. 32. 



This beautiful shell, distinguished by its delicately-sculptured sur- 

 face, is widely distributed in Florida, and represented by several marked 

 varieties. A delicate form resembling L. casta Lea, but narrower and 

 almost exactly simulating a Succinea, was found in a ditch alongside 

 the Florida Southern Railroad track at Gainesville, Fla. A stout, 

 acutely-pointed, very calcareous form with a red tip, was collected by 

 Mr. I. Greegor at the mouth of the Saint John's Eiver. Another of 

 similar form, but thin and delicate, also red-tipped, was obtained by 

 Professor Wetherby at Pensacola. A smaller race, dark brown, with 

 the spiral sculpture beautifully developed, was obtained by me at 

 Palatka, on the banks of the Saint John's River, and in a brook at 

 Enterprise, Lake Monroe. 



Limnaea hii mills Say. 



Linuid'a liumUis Say (1822), Biuu., 1. c, p. 63. 



Kearly typical specimens were obtained by Stearns near the saw-mill 

 at Tampa. This is a more southern locality than it has yet beeij re- 

 ported from. 



Planorbis parvus Say. 



Planorbis parvus Say (1817), Biniiey, 1. c, p. 133. 



Saint John's River at Palatka, Dall. 



The figure of this species in the Laud and Fresh-Water Shells of North 

 America is poor; figure 224 is almost exactly like the same view of P. 



