Mollusca of Middlebury, Vt. and Vicinity. 273 



Foreman, of Baltimore, I have received specimens collected at 

 Charleston, S. C. At many intermediate places it has been found 

 by numerous observers. 



H. Sayii, Bitmey. This species is very rare here, only one 

 good specimen, and a few partially decayed, having been found. 



H. ij^identata, Say. This species is not common in this re- 

 gion. Its size is less than that of specimens from the western 

 states. 



H. labyri?ithica, Say. This singular little species is not rare. 



U. indentata. Say. This species is rare. The animal is re- 

 markable for being of a rather light blue color. 



H. arborea, Say. This species is very common. It inhabits 

 both dry and wet lands. In the former situation the shell is of a 

 pale horn color ; in the latter it is of a deep brown, and the ani- 

 mal is black. The latter variety attains a greater size, some spe- 

 cimens in my cabinet being .3 in. broad. 



H. inornata, Say. One specimen only has been obtained 

 here. With this exception, I believe this species has not been 

 found in New England. 



H. alternata, Say, This species is very common. At the 

 Brothers' Islands, it attains its greatest size, some specimens being 

 one inch in diameter. 



U. chersifia, Say. In April, 1839, this species was found in this 

 town. Not long after it was found near Boston. It is not rare. 



H. lineata, Say. This species is not rare. It is of a beautiful 

 light green, and is remarkable for its resemblance to a Planorbis. 



H. striatella, Anth. This species, long confounded with H. 

 perspectiva, Say, which does not occur in New England, was 

 first recognized as a distinct species by J. G. Anthony, Esq. In 

 this species the last whorl much exceeds the umbilicus in diame- 

 ter, while in Say's shell it is not more than equal to it. The last 

 whorl in the former is also much larger. Less essential differ- 

 ences are that Say's species is larger, uusally of a darker color, 

 and that it has the striee more elevated. The striatella is quite 

 common here. 



H. fuliginosa, Griffith, \s rare in this part of Vermont. 



H. electritia, Gould, in Binney^s Monog. This species was 

 discovered by me in Marion Co., Mo., in Nov. 1837. In August, 

 following. Col. A. Bourne, of Chillicothe, Ohio, forwarded to me 

 specimens from that place. Subsequently I have found it in this 

 town and at Rogers's Rock, Lake George, and Dr. Gould has 



