742 DR. J. E. GRAY ON THK CALYI'TRyEID.K. [June2r, 



5. Trochilina solida. 

 Calyptrcea solida. Reeve. 



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

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

 Hab. Conchagua (C. A.). 



6. Trochilina lichen. 



Calyptreea 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. 



CalyptrcBa unguis, 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 j)ale brown. 



Hab. ? 



3. POCULINA AURITA. 



Calyptreea 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, irilh the edge of 

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

 ginal cavity. 



Galerus, Humphr. ; Adams. 

 Mitrella, Leach. 

 Mitrula, Gray. 

 Infundihulum, J. Sow. 



