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. 



CABINEA 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. (fig. 93-) 



VOLVARIA Lam. Cylindrical ; lengthened ; the ex- 

 tremities obtuse ; the surface sculptured ; base of the 

 pillar with 35 distinct plaits ; outer lip crenated ; 

 aperture linear ; fossil. 



V. concinna. Sow. Man. f. 439. (fig. 94. a.) 



OYLINDRELLA Sw. Cylindrical, narrow, and 

 obtuse, as in Folvaria ; but the surface 

 and outer lip are smooth, and there are 

 no plaits on the pillar. 



C. alba Sw. (/<?. 94. 6.) 



ERATO Risso. Ovate, more or less angulated, smooth 

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

 large, angulated, emarginated aperture j pillar slightly 

 crenated ; outer lip reflected, and denticulated on the 

 inner edge ; sutures covered with enamel.* 

 E. Maugeri. Sow. Man. 43. f. 454. 



ORDER PHYTOPHAGA. 



FAMILY 1. HELICID^E. 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 Marginella, 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 Trived). The circle of the Cyprceidce rs 

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



