316 



SHELLS AND SHELL-FISH. 



PART II. 



it forms a short internal channel ; operculum ear - 



shaped. 



nodulosum. En. Mdth. 442, tuberculatum. Mart. 157. 

 f. 3. f. 1490. 



Family 4. VOLUTID^. 



Shell destitute of a channel ; the base truncated and 

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

 culum none. 



SuB-FAM. 1. VOLUTINiE. 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.) 



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

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

 minal whorls, where they exist, being smooth and 

 unsculptured. 

 1. Turbinelliform type. Shell melon-shaped; spire very 



* Except in Volutiliihes, •which wants the three last characters, — the 

 plaits.being faint, the tip of the spire acute, and the lower plaits the longest. 



