CONUS. 45 
C. zerotus, Reeve. PI. 13, fig. 53. 
Shell oblong, turbinated, rather thick, somewhat rudely 
twisted at the base, transversely obsoletely striated in a slightly 
waved manner, irregularly longitudinally marked with lines of 
growth; spire flatly depressed, minutely obsoletely carinated 
towards the apex; cream-color, marked with rows of very 
minute pale brown dots, leaving a white band in the centre ; 
base dark livid violet. Length, 2 inches. 
Philippines. 
C. tivipus, Hwass. PI. 13, figs. 54-57. - 
Spire coronated, depressed conical, lower half of body-whorl 
distantly striated, and the striz sparsely granulous; light 
yellowish or olivaceous to orange-brown, tubercles of the spire 
and a band below the shoulder, as well as a central band on the 
body-whorl, white, base and interior violaceous; epidermis 
somewhat tufted in distant revoiving series. Length,l‘5—2 inches. 
Red Sea to Polynesia, HE. Africa, Mauritius. 
Differs from C. flavidus in having coronated whorls, a char- 
acter which I fear is not specific. C. citrinus, Gmel. (fig. 55°, 
as usually, but perhaps incorrectly, identitied, belongs here ; 
Quoy, who describes the animal as bright red, calls it C. 
sanguinolentus. 
Var. sUGILLATUS, Reeve. PI. 13, fig. 56. 
Tubereles oblique; spire-whorls flatly channeled, more or less 
stained brown; the white bands of the body-whorl more dis- 
tinct, the brown surface more or less resolved into very close, 
faintly brown-spotted lines. 
Var. CREPUSCULUM, Reeve. PI. 13, fig. 57. 
Pale yellow, without white bands, of much lighter growth than 
C. lividus, spire obsoletely finely beaded, aperture white. An 
obscure form. Length, 28 mill. 
C. optitus, Reeve. Pl. 13, fig. 58. 
Shell narrow, with convexly depressed, tuberculated spire, 
body-whorl striate below ; yellowish olivaceous, indistinctly white- 
banded in the middle, tubercles, and a band below the shoulder 
also white, base and aperture violaceous. 
Length, ‘9-125 inches. 
Philippines. 
