326 



SHELLS AND SHELL-FISH. 



PART II. 



contracted and produced into two long beak-like pro- 

 cesses ; aperture effuse ; the outer lip inflected^ but 

 not toothed. 



B. volva. En. Meth. 357. f, 3. 



Carinea Sw. Oblong ; the extremities not 

 produced ; aperture nearly straight, almost 

 central, contracted above, and very effuse 

 below ; lips equal ; the outer slightly 

 toothed. 



C. gibbosa. En. Meth. 357. f. 4. (Jig. 93.) 



VoLVARiA Lam. Cylindrical ; lengthened ; the ex- 

 tremities obtuse ; the surface sculptured ; base of the 

 pillar with 3 — 5 distinct plaits ; outer lip crenated ; 

 aperture linear ; fossil. 



V. concinna. Sow. Man. f. 439. (/^. 94. a.) 



04. 

 Oylindrella Sw. Cylindrical, narrow, and 



obtuse, as in Volvaria ; but the surface 



and outer lip are smooth, and there are 



no plaits on the pillar. 



C. alba Sw. {fig. 94. I. ) 



Erato Risso. Ovate, more or less angulated, smooth 

 or granulated, with a dorsal scar, short spire, and 

 large, angulated, emarginated aperture ; pillar slightly 

 crenated ; outer lip reflected, and denticulated on the 

 inner edge ; sutures covered with enamel.* 



E. Maugeri. 



A, 



Sow. Man. 43. f. 454. 



Order PHYTOPHAGA. 



Family 1. HELICIDiE. Snails. 



Animal pulmonary ; breathing by a lateral opening ; 

 shell light, turbinated, or spiral ; the aperture always 



* I have not seen this curious little genus. Mr. Sowerby, in addition to the 

 above, adds, " it resembles Marginclla, but has no folds on the pillar. Hav- 

 ing a groove down the back, he considers it intermediate between Margi- 

 nella and Cyprcea,'" (or rather Trivea), The circle of the Cyprceidce is 

 thus closed, and its union with the Volutidce at once established. 



