CALYPTR^A. 119 



C. RADiATUM, Brod. PL 33, figs. 52, 53. 



Conicall}^ orbicular, whitish raj^ed with dark chestnut without 

 and within, radiatel}' striated and very closely finely ridged ; 

 internal appendage cup-shaped, produced, concavely compressed 

 on one side. 



Bay of Caraccas. 



Broderip describes the cup as " pressed in on one side, adher- 

 ing to the shell not only by its apex, but also by a lateral seam, 

 which scarcely reaches to the rim of the cup." A doubtful species. 



Section Bicatillus, Swainson, 1840. 

 C. EXTiNCTORiUM, Lam. PI. 33, figs 46-51. 



Thin, shining, smoothish, apex elevated and twisted ; brownish 

 white, more or less rayed or spotted with chestnut ; interior 

 appendage small, cornucopia-shaped. 



Malacca^ Singapore, Mauritius. 

 It is C. Isevigatum of Chenu, G. morbidum, Reeve (figs. 48, 49), 

 and G. lividum, Reeve (figs. 50, 51), a brown varietj'. 



C. VERRUcosuM, Reeve. PI. 33, figs. 54, 55. 



Shell orbicular, conical in the middle, top central, somewhat 

 mamillary, yellowish cream-color, rather opaque, more or less 

 raj'ed and spotted with chestnut, surface interruptedly laterally 

 wrinkled; cup small, cornucopia-shaped. 



Yucatan (Norman). 



Described without locality, which is supplied from specimens 

 in Mus. Philad. Acad. 



C. MAMMULA, Rochebrune. (Unfigured.) Senegambia, 



Genus CALYPTRiEA, Lamarck, 1*799. 

 C. Sinensis, Linn. PI. 34, figs. 56, 57 ; PI. 30, fig. 7. 



Orbicular, thin, smooth or finely scaled, shining within; white 

 or yellowish white. 



Europe. 



Dr. Jeffreys writes : "It would seem that this mollusk seldom, 

 if ever, leaves its place of abode. I found some at Sark, living 

 attached to small pebbles, each pebble having scarcely a broader 

 surface than the circumference of the shell, which closely fitted 

 the sinuosities of the stone. Both shell and pebble were en- 



