LIMNZA. 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 Planorbis. 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) 8 
