MITRELLA. 131 



often with three white zones ; whorls five, flattened ; aperture 

 about half the total length. Animal white* Length, 4*5 mill. 



New England. 



Differs in coloring and form, being more attenuated, and in 

 the want of inferior revolving lines from G. lunata which 

 attains about the same dimensions. This species is better known 

 under the name of C. dissimilis, Stimpson, C. zonalis having 

 been described from an immature shell. 



C. DERMESTOIDES, Kiener. PL 49, fig. 25. 



Shell smooth, shining, of five or six whorls, coveted with reddish 

 ocellations and banded with alternate white and reddish spots 

 on the periphery ; outer lip thin, slightly dentate within. 



Length, 8 mill. 



West Indies. 



Kiener gives the Mediterranean Sea as locality, which is an 

 error; as well as Angas' identification of an Australian species 

 with it. Reeve's figure scarcely represents the shell. Compare 

 with C. moleculina, Duclos. 



C. SPIRANTHA, Ravenel. 



Shell small, ovate-conic; smooth, except at the base, where 

 there are a few revolving lines; whorls seven, in mature speci- 

 mens, nearly flat, with the suture distinct ; color brown, with a 

 series of irregular triangular spots of a dull 3^ellow ; sometimes 

 the general color is dull yellow, with brown waving lines, marking 

 off* the whorls with the irregular spots; aperture oval, about one- 

 third the length of the shell, with a slight recess at the posterior 

 angle, and a short canal in front ; brown with a few teeth within 

 the outer lip, and a smooth slight callus on the pillar. 



Length, 4 mill. 



Wando River, So. Carolina. 



Animal white ; proboscis half the length of the shell ; foot a 

 little longer than the shell, narrow, wider in front ; posterior end 

 quite narrow but not pointed ; operculum small, on posterior end 

 of foot; head projecting from the foot, with tentacles one-third 

 the length of the shell, very delicate, almost hair-like, with small 

 black eyes at the base. Animal active, keeping the proboscis in 

 constant motion, while the tentacles are little used. 



This shell is like C. lunata, Say, but is narrower in proportion 



