20 

 SUBGENUS STENOTREMA, Rak. 



iiciix iiirHiita, Say. Shell luis live rounded wliiils. 

 which are covered with line bristl}^ hairs resembling 

 minute spines ; aperture narrow, almost closed by an 

 cjlongated tooth on tlie parietal wall, peristome de- 

 pressed witli notch near its centre, umbilicus, covered, 

 breadth 8i mill. 



This interesting species is quite abundant and grows 

 Wirge. Some of th(.» iinest specimens I have seen from 

 (his (or any,) locality were found by Mr. A. C. Baldwin 

 and myself in the Deer Park, and also in a ravine on 

 the south side of the Vermillion River, n(^ar the Farn» 

 Ridge Bridge. The situations and conditions were— a 

 constant supx^ly of shade and moisture. The rich, 

 deep chestnut coloring of our species is noticeable. 



IIF.T.IX !?10:\01>03r, Eackktt. 



Shell depressed, whirls iive, hairy ; umbilicus par- 

 tially covered, aperture lunar, a lamelliform tooth on 

 the parietal wall, i)eristonu) white, acute, reflected ; 

 shell horn color, breadth 10 mill. 



Tliis species is not so abundant as the preceding, 

 but has been found by Mr. A. C. Baldwin and myscilf 

 in the town of Deer Park, on the Fox River, in thf> 

 Illinois Valley near Fall Creek, and in ()])en tracts of 

 (K)untry near the timber. 'I'lie situations were dry oiu^s. 



v:iriofy i.oaii, avaki). A souiewhat smaller shell 

 than //. monodon, of which it is a variety, undoubtedly. 

 It differs in its size and is only found in same situations 

 as //. Mrsuia. 



