STROMBINA. 185 



C. DORSATA, Sowb. PI. 60, fig. 9.1. 



Yellowish white, maculated and closely longitudinally marked 

 with flexuous or zigzag chestnut lines ; aperture externally 

 callously thickened, with a corresponding thickening on the 

 opposite side of the body-whorl, and a hump on its back. 



Length, -8-1-1 inches. 



West Coast of Columbia; Central America. 



G. gibberula, very much resembles this species, but is much 

 smaller. 



C. PAVONINA, Hinds. PL 60, figs. 92, 93. 



Shell yellowish white, longitudinally, flexuously striped and 

 strigated with chocolate; striate towards the base, which is 

 narrowed and recurved ; lip callously thickened externally, 



denticulate within. Length, 22 mill. 



Panama. 

 C. Haneti, Petit (fig. 93), is a synonym. 



C. NIVEA, Sowb. PI. 60, fig. 94. 



Whorls strongly plicate, with the interstices and base striate; 

 white. Length, 19 mill. 



Habitat unknown. 



Reeve acknowledges that this is not a very satisfactory species. 

 I am inclined to think it a distorted growth of C. pavonina, as 

 in that species some of the growth-lines are incipient plications 

 and the superior striae are sometimes recognizable with a glass. 

 It was probably beach-worn. 



C. BOURJOTIANA, Crosse. PI. 60, fig. 95. 



Shell smooth, white, with light chestnut undulated longitudinal 

 lines ; aperture light yellowish, white-margined, nearly eden- 

 tulous within. Length, 14 mill. 



Habitat unknown. 

 C. PULCHERRIMA, Sowb. PI. 60, fig. 96. 



Shell spirally ridged and longitudinally plicated, the spire 

 acuminated, with a sharp apex ; yellowish brown, the ridges 

 tinged with chestnut; lip thickened, strongly dentate within. 

 Length, 23 mill. 



Gulf of Dulce, Central America. 



Described from a single specimen, dredged by Mr. Cuming 

 from sandy mud at a depth of ten fathoms. It is remarkably 

 distinct from all its congeners. 

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