1818.) GENUS POLYGYRA. 277 



folds concave beneathj pillar lip raised above the prece- 

 ding whorl, and concave beneath. 



Animal granulated; tentacula four; eyes at tip of tlie 

 superior tentacula and retractile; operculum none. 



SPECIES. 



1. P. ^auriculata. *S*/z^// beneath convex; wAor/^ five, 

 a little rounded, crossed by numerous raised, equidistant 

 lines forming grooves between them; spire very little 

 raised; lateral line (extending from the outer whorl to the 

 apex) not convex, but somewhat concave; mouth very 

 imequal; lips prominent above, adpressed to the prece- 

 ding whorl beneath; pillar lip suddenly reflected, and 

 pressed into the mouth at an acute angle, beneath very 

 acutely concave; outer lip a little more prominent in the 

 middle, and within the edge protruded into the mouth; 

 throat extremely narrow; suture near the mouth sudden- 

 ly reflected from the preceding whorl, and carinate; um- 

 bilicus dilated, very small within, and exhibiting a groove 

 on the outer whorl. 



Breadth of the female nearly half an inch, 

 of the male about three-tenths. 



Inhabits Florida. 



Cabinet of the Academy. 



This curious species we found near St. Augustine, 

 East Florida, in a moist situation. They were observed 

 in considerable numbers; the colour is reddish bro\vn, 

 indistinctly banded with Avhitish lines, sometimes with 

 darker ones, mouth white. 



2. P. ^avara. Shell covered with numerous short, 

 robust hairs; spire convex; whorls four, regularly round- 

 ed, with hardly elevated lines forming grooves, which 



