354^ SHELLS AND SHELL-FISH. 



SuB-FAM. PHASIANELLINiE. 



Obovate^ spiral, polished; aperture ovalj spire longer 

 than, or equal to, the aperture ; operculum shelly. 



Phasianella Lam. Umbilicus none. (fig. IO9. &.) 

 P. bulimoides. En, Meth. 449. f. 1. a — c. 



Family HALIOTID^. The Ear-Shells. 



Shell disk-shaped entire ; the spire nearly obsolete, de- 

 pressed, convolute, mostly lateral, and of only two or three 

 minute whorls ; pillar none ; operculum none. 



Haliotis Linn. Iridescent ; ear-shaped ; a row of per- 

 forated holes on the thickest side of the aperture. 

 The sub-genera remain to be determined. 



Stomatia Lam. Oval or oblong; the shell resembling 

 Haliotis, but without perforations. 

 The types of form are enumerated at page 232. 



CALYPTBiEA Lam. Shell not perlaceous ; patelliform, 

 but with the first rudiments of an internal support, 

 and often of a spire. 



Bicatillus Sw. Shell patelliform ; spire or whorls 

 none ; a cup- shaped appendage within, more or less 

 complete 



B. extinctorium Sw. Sow. Gen. f. 3. deformis. lb. f. 1. 



Calyptrcea Lam. Patelliform ; internal appendage half • 

 funnel-shaped, but open in front. ^^^ 



C. equestris Lam. Sow. Man. f. 234. Sow. Gen. f. 2. 



Haliotidea Sw. Spire prominent, formed of two whorls, 

 and placed laterally ; umbilicus open, 

 sigaretoides. * Sw. dilatata ? Sow. Gen. f. 9. ( Calyptra^a. ) 



* This sub-genus seems to form, with certain VetuUnce, the passage to 

 CUV Chelinotus, or the Sigareti of authors. 



