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 



