354 SHELLS AND SHELL-FISH. PART II. 



SUB-FAM. PHASIANELLIN^E. 



Obovate, spiral, polished; aperture oval; spire longer 

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



PHASIANELLA Lam. Umbilicus none. (fig. 109. &) 

 P. buliraoides. En. Meth. 449. f. 1. 



FAMILY HALIOTID.3E. 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. 



CALYPTB^A Lam. Shell not perlaceous ; patelliform, 

 but with the first rudiments of an internal support, 

 and often of a spire. 



Bicatittus Sw. Shell patelliform ; spire or whorls 

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

 complete 



B. extinctorium Sw. Sow. Gen, f. 3. deformis. Ib. f. 1. 



Calyptrtsa 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. ( Calyptraa. ) 



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

 our Chelinotus, or the Sigareti of authors. 



