CONCHOLOGIA CESTRICA. 45 
shell is more depressed; the whorls are smaller; the 
aperture is wider, and less round; and the angle of 
V. minuta. — [ Morse. ] V. pulchella, — (Morse. } 
Fig, 69, Fig. 70. 
——=~S 
2 

aperture; is 27>; whilein) V. pulehellaut is 35°) They 
also differ in the dentition of the lingual membrane ; 
and the periostraca. Both species agree in presenting 
varieties which are strongly, and transversely, costate. 
Sub-genus PATULA, HELpwie, 1837. 
Shell umbilicate, turbinate, or depressed-discoid; ru- 
gose or costate-striate ; whorls 4-5, sub-equal; aperture 
lunate-rotundate ; peristome simple, acute, straight. 
P. striatella, ANTHONY. 
Helix striatella, Anthony, Bost. Jour. Nat. Hist., III, 
1840. 
P. striatella, —[B. & B.] Jaw of P. striatella, —[{Morse. | 
Fig, 72, 
Wi 







\ \\\\ \\ 
\\\ 
WY 


Shell depressed-convex, reddish horn color, or brown ; 
