316 



SHELLS ATJD SHELL-FISH. 



PART II. 



it forms a short internal channel ; operculum ear- 

 shaped. 



nodulosum. En. M^th. 442. tuberculatum. Mart. 157. 

 f. 3. f. 1490. 



Family 4. VOLUTID^. 



Shell destitute of a channel ; the hase truncated and 

 notched ; the pillar marked with folds or plaits ; oper- 

 culum none. 



SuB-FAM. 1. VOLUTINS. True Volutes. 



Spire shorter than the aperture, which is never striated; 

 pillar with distinct plaits, the upper ones the shortest ; 

 tip of the spire papillary.* (fig. 81.) 



f'tHI /Md 



'^"W ^ 



VoLUTA Linn. Shell large, ventricose ; the spire ex- 

 tremely short, very ohtuse, and papillary ; the ter- 

 minal whorls, where they exist, being smooth and 

 un sculptured. 

 I. Turhinelliform type. Shell melon-shaped; spire very 



* Except in Volut^lithes,'vlh\c\\•v^?^x\ts, the three last characters, — the 

 plaits^being faint, the tipof the spire acute, and the lower plaits the longest. 



