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POPULAR CONCHOLOGY. 



Family 20. — CALYPTRJEACEA. 



Dispotoea. 



The animals have the head lengthened, cloven, and 

 snout-formed; two long tentacula, with the eyes at the 

 base ; the tongue membrane is on the front part, winged 

 on each side, and the wings below are united ; in the 

 middle line a row of teeth, and on each side three rows of 

 hooks. The shell is not symmetrical, never accurately 

 regular. — Marine. 



Dispotoea. Say. (Calypeopsis Lesson ; Bicatillus Sw. ; 

 Calyptrasa Lam. part.) — Shell conical, cup- 

 shaped, more or less elevated, with a circular 

 base ; not spiral, but with a central apex, from 

 which in the interior proceeds a horn or cup- 

 shaped appendage, which is connected with the 

 right side of the shell. 



This genus embraces the Calyptrcea auriculata, rugosa, 

 imbricata, quirquina, &c. of the Pacific. They are also 

 found in the fossil state. 



Crucibulum. Schum. (Siphopatella Lesson; Bico- 

 nia Sw. ; Calyptrsea Lam. part.) — 

 Shell conical, cup-shaped, mostly 

 elevated, without whorls, with 

 nearly circular base ; apex central, 

 from which in the interior is sus- 

 pended an appendage, which is 

 connected with the'right side, entire 

 at the edge, but compressed on one 

 side. 



Generally found attached to other shells, in the seas of 

 America, Japan, &c. 



Mitrularia. Schum. (Cemoria Risso ; Calyptraea 



Crucibulum rude. 



