230 CLAVATULA. 



row of scale-like tubercles ; columella covered with a thick white 

 callus ; interior of aperture stained above and below with violet. 

 Length, 55 mill. 



Cabenda, W. Coast of Africa ; 5 fms., in soft mud, 



washed down by the waters of the Congo. 

 A rare species, from its appearance probably an inhabitant of 

 brackish water. 



C. IMPLICATA, Reeve. PI. 8, fig. 23. 



Shell pyramidally turreted, whorls depressed around the upper 

 part, with revolving rows of nodules below, upper row on the 

 periphery-angle, and duplicate ; covered with a thick olivaceous 

 epidermis, aperture whitish. Length, 1 inch. 



Habitat unknown. 



Described from a single specimen. Its characteristics appear 

 to be the long spire, and double row of tubercles on the shoulder- 

 angle. 



C. COLINI, Maltzan. PI. 30, fig. 84. 



Rosaceous, with a superior, and an inferior brown band. 



Length, 1 inch. 



W. Africa. 



A narrower form, with longer spire than any other species 

 except C. implicata, from which it may be distinguished by its 

 carina and more pronounced canal, as well as by color. I doubt 

 whether it is really distinct from C. muricata. 



C. C^ERULEA, Weinkauff. PI. 5, figs. 59, 60. 



Shell narrowly turreted, strongly keeled, the keel tuberculated, 

 with revolving, sometimes granulous striae below it, the granules 

 more apparent at the base ; bluish, the tubercles white, with the 

 interstices purplish. Length, 20 mill. 



W. Africa (Maltziin). 



According to Maltzan the shell is white, with two corneous- 

 bluish bands. The appearance of the figure, especially of the 

 canal, indicates a young shell. 



C. PATRUEFJS, E. A. Smith. PI. 32, fig. 39. 



Reddish brown, with a white narrow band on the periphery, 

 and, on the body-whorl, a second inferior band; whorls twohv 

 and a-half, with obsolete flexuous longitudinal plications, crossed 





