176 SEMINELLA. 



C. STRTATULA, Dimker. PL 58, fig. 39. 



Shell subcylindrical, with acuminated and sharp-pointed spire, 

 closely longitudinally plicate, the plicae sometimes becoming 

 obsolete towards the middle of the body-whorl, with close 

 revolving striae crossing over the ribs, but strongest towards the 

 base of the shell ; lip varicoselj' thickened externally and slightly 

 plicate within ; yellowish, with chestnut fascicles at the sutures 

 and one or two bands of oblique chestnut spots. 



L. 1-5 mill., diam. 2-5 mill. 



Ta7ieiti. 



Described from specimens which formed a portion of the 

 original collection of this species, 



C. COSTELLIFERA, Pcase. 



Shell oblong-ovate, longitudinally ribbed ; ribs about twenty, 



close, compressedly rounded, extending the whole length of the 



whorls, very slightly constricted beneath the sutures ; whorls 



five, plano-convex ; aperture rather wide ; sinus open, on the 



central third of the lip ; base subtruncate ; canal very «hort ; 



ribs grayish white : interstices sometimes reddish brown ; last 



whorl partially banded or irregularly painted with reddish 



brown. L. 5, diam. 2 mill. 



Polynesia. 

 Unfigured, and unknown to me b}' specimens. 



C. suLCOSA, Sowb. PL 58, fig. 40. 



Shell lead-black, with distant, sharp, longitudinal, lighter- 

 colored ribs, often appearing continuous from apex to base, 

 interstices sometimes showing revolving striae ; aperture choco- 

 late, the lip notched behind, minutely denticulate within. 



Length, 8 mill. 



Panama; Annua and Lord Hood^s Islands (Cuming). 



C. MOESTA, C. B Adams. PL 58, fig. 41. 



Shell very dark chocolate-color, obliquely closely ribbed, the 

 interstices with revolving striae ; the ribs disappear upon the 

 upper portion of the body-whorl and the striae become con- 

 tinuous ; lip externally varicose, notched behind, crenulated 



within. Length, 7 '5 mill. 



Panama. 

 Possibly only a narrow variety of G. nigricans, Sowb. 



