742 DR. J. K. GRAY ON THE CALYPTR/EID^. [JlUie 27, 



5. Trochilina solida. 

 Calyptrcua solida. Reeve. 



Shell high, conical, solid, smooth, opaque, white ; inner surface 

 and apex purple brown ; internal plate very oblique, white. 

 Hub. Conchagua (C. A.). 



6. Trochilina lichen. 

 Calyptraa lichen, Brod. 



Shell very depressed, white, with a few obscure reddish dots, 

 smooth. 



Hab. ? 



3. POCULINA. 



Shell conical ; base circular, deeply concave ; apex acute, central ; 

 nucleus spiral ; cavity conical, with an oblique triangular subspiral 

 lamina on one of the sides, which has the pillar bent back so as to 

 form a large deep concavity or umbilicus extending to the apex of 

 the cavity. 



This genus is distinguished from Mitrella by the apex being dis- 

 tinctly spiral, 



1. PoCULINA UNGUIS. 



Calyj)trcea mnjuis, Brod. 



C. solida, Brod. (Chenu, Man. f. 2340). 



Shell solid, high, conical, smooth, brown. 

 Hab. ? 



2. POCULINA POCULUM. 



Calyptreea poculum, Reeve. 



Shell thin, conical, smooth, white or pale brown. 



Hab. ? 



3. PoCULINA AURITA. 



CalyptrcBU aurita. Reeve (Chenu, Man. f. 2336). 

 Shell depressed, conical, broad, thin, pale brown ; outer surface 

 closely and regularly radiately striated. 

 Hab. ? 



Tribe V. Shell conical, subspiral ; the cavity simple, conical ; the 

 internal lamina moderate, oblique, irregular, with the edge of 

 the pillar-lip refiexed, forming a narrow elongated deep mar- 

 ginal cavity. 



Galkrus, Humphr. ; Adams. 



Mitrella, Leach. 

 Mifrula, Gray. 

 Itifundibulvm, J. Sow. 



