CONCHOLOGIA CESTRICA. 



Genus SUCCINEA, DRAPARNAND, 1801. 



Animal of Succinea. 



Fig, 85, 



Generic characters as above. 



S. ovalis, GOULD (non SAY), Invert, Mass., 1841. 

 Shell ovate-conic, very thin, shining, pale amber; 

 s, ovaiis. spire acute ; whorls 3, the last elon- Jnw of s. ovaiis. 



IB & Bl i 111 11 [Morse.] 



Fi 86 S a t e d > aperture produced, broadly p- 87 

 rounded below, more than three- 

 fourths of the total length ; lingual 

 membrane with 80 rows of 40-1-40 

 teeth, each ; buccal plate strongly 



arcuate, with three small folds on the cut- \ 



ting edge. H. 12, W. 6, mill. 



Lingual Dentition of S. ovalis. [Morse.] 

 Fig, 88, 



S. obliqua 



(B. & B. 



Fig, 89, 



Station, on plants, and among wet chips, in autumn. 

 Chester County ; frequent. 



S. obliqua, SAY, Long's Exped., II., 1824. 



Shell ovate, thin, shining, striate; whorls 

 3, last whorl ovate ; aperture oval, both sides 

 equally curved ; nearly three-fourths of the 

 total length; yellowish green. H. 2025, W. 

 12-13, mill- 

 Station, on plants growing in and near 

 water. Chester County ; frequent. 



