PLANORBIN.A. 187 
3. CARINIFEX, Binney. Shell dextral, spi- 
-ral, inflated, angular, horn-colored; spire ele- 
vated, terraced; whorls numerous, angular, 
visible above; last whorl very large, broad 
above, very rapidly attenuated below; um- 
bilicus funnel-shaped; aperture triangular, 
broad above, narrow below; inner lip slightly 
thickened; outer lip thin, acute, angular 
above, flexuose. 
Mr. Binney places this genus between Lim- 
nea and Physa, but I think its characters 
place it decidedly in the Planorbine. I 
award priority to Mr. Binney’s name over 
that of Mr. Lea, Megasystropha, although the 
description of the latter was the first pub- 
lished, because Mr. Binney’s name was 
printed (although without description) and 
the type species indicated at a somewhat ear- 
lier date. 
(34) 
