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. Count, 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. cHRuLEA, Weinkauff. Pl. 5, figs. 59, 60. 
Shell narrowly turreted, strongly keeled, the keel tuberculated, 
with revolving, sometimes granulous striz below it, the granules 
more apparent at the base; bluish, the tubercles white, with the 
interstices purplish. Length, 20 mill, 
W. Africa (Maltzan). 
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. PATRUELIS, E. A. Smith. Pl. 32, fig. 39. 
Reddish brown, with a white narrow band on the periphery, 
and, on the body-whorl, a second inferior band; whorls twelve 
and a-half, with obsolete flexuous longitudinal plications, crossed 
