124 



POPULAR CONCHOLOGY. 



Hingicula. Deshayes. — Shell small, globose, very 

 solid, sinuated at the base ; spire short, sharply 

 acuminated; columella short, with a plait-like 

 callosity at the upper part, and two strong plaits 

 beneath ; aperture small ; lip remarkably thick- 

 ened.* Animal unknown. — About 4 species ; 

 also fossil. 



The Ringicula auriculata, about the size of a pea, is 

 found in the Gulf of Tarentum; it has a white porcel- 

 lanous appearance. A fossil species from Grignon, about 

 the same size, is an exquisite little shell; the aperture 

 curiously formed, with the outer lip much thickened, and 

 crenulated, the inner with a strong callosity and very 

 prominent plaits ; the spire elegantly pointed, but short ; 

 and the whorls deeply marked with transverse bands set 

 close together. 



Cinulia. Gray. ( A vellana D'Orb; Einginella Z)' Or b.) 

 — Shell spherical, globular, short, with or without dotted 

 stripes ; the spire very short ; the aperture half-moon 

 shaped, compressed together, and curved, without a notch 

 at the lower part; the outer lip is very thick, often 

 toothed at the outer, almost always at the inner part ; the 

 edge of the inner lip is provided with three or four teeth, 

 of which the front one is the strongest. — 22 species, 

 fossil. 



This genus is distinguished from Cassis by the want of 

 a canal ; it has a great resemblance to Auricula. 



Tylostoma. Sharpe. — Shell ovate, or globose, 

 thick, almost smooth, with a moderately elevated spire; 

 aperture half-moon shaped; the lips joined above in a 

 sharp angle ; the outer lip has inwardly a thickened 



* Reeve's Elements of Conch. 



