PLANOKBIN^. 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 Planorbinas. 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. 



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