LIMNEA CAPERATA. 35 



rent: surface closely covered with numerous 

 and very fine spiral, light-colored, elevated, 

 epidermal lines; which are quite distinct upon 

 the young or half-grown, but obsolete upon the 

 adult shell: aperture ovate, semicircular, or 

 subrotund: labium apparent, with scarcely any 

 fold; and separated from the basal whirl ante- 

 riorly, so as to form a more or less distinct 

 umbilic. 



Color yellowish-brown, sometimes marked 

 with whitish or reddish varicose bands: aper- 

 ture frequently stained with reddish-brown. 



Geographical Distribution. Prof. Adams 

 has sent me specimens from Vermont, and 'L. 

 umbilicata' from New Bedford: Mrs. Say from 

 the Wabash: Dr. Wm. Blanding from Illinois: 

 Mr. Anthony from Ohio: and I have found it 

 in eastern Pennsylvania. 



OBSERVATIONS. 



Two of the characters given by Say to this 

 shell — "spire half the length of the mouth .... 

 suture not very deeply impressed" — do not 

 apply to any of seventy or eighty specimens 

 now before me; all of which have a well mark- 

 ed suture, the spire equalling the length of the 



