LIMN^A. 99 



the total length, contracted, somewhat ear- 

 shaped, columella with a considerable twist, 

 reflected over and nearly covering the umbili- 

 cus. Light brown or horn color, shining, tip 

 of spire and interior margin of labrum colored 

 dark bluish-purple. 



Length 19, diam. 9 mill. 



Weatoque, Hartford Co., Connecticut. 



This very curious species was found in an 

 artificial pond in 1865, and has not occurred 

 elsewhere. A pint of specimens were obtained, 

 remarkably uniform in character. The pond 

 has no connection with any. other body of 

 water, the overflow being lost in a sandy 

 plain. In the same locality occurred a new 

 species of PlanorUs. Full particulars relating 

 to this interesting locality accompany the 

 original description in American Journal of 

 Conchology, vol. 2, p. 112. Here are instances 

 of species of very recent origin. 



(73) 



