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CERITHIUM ASPERUM. | 
Shell pyramidal ; whorls slightly convex, encircled in the middle 
with a row of nodules, and on either side a row of granules ; interstices 
spirally striated, striz raised and unequal in size; aperture ovate ; 
columella arcuate, a slight callosity posteriorly ; canal short. Colour 
whitish or light-fawn ; nodules and strie reddish brown. 
CERITHIUM PAXILLUM. 
2 Shell somewhat ovate, turreted ; whorls seven, slightly convex and 
varicose, ornamented with four rows of granules, and interstices with 
fine raised strize, longitudinally rudely ribbed, ribs and granules be- 
coming obsolete at the periphery of the last whorl ; columella arcuate, 
and callous within ; aperture ovate, canal very short. Colour light 
brown, granules black. 
CERITHIUM BETICUM. 
Shell turreted; whorls seven or eight, slightly convex, spirally 
ribbed; ribs regular, depressed, alternately smaller, obsoletely varicose ; 
aperture ovate; canal very short, abruptly truncate. Colour light- 
fawn, ribs black, or black with a yellowish band at the margins of 
the whorls, or spotted and marbled with different shades of brown, 
fawn-colour, and white. 
VERTAGUS GRANIFERUS. 
Shell subulate ; whorls about twelve, flat, bordered by prominent 
and slightly elongate granules on both sides, intermediate space 
ornamented with two rows of granules of smaller size, interstices 
filled by a ridge, somewhat flexuous ; aperture small, oblique, elon- 
gate-oval ; columella slightly arched, callous, and furnished with a 
single fold. Colour white or dusky, spotted irregularly with brown, 
spots at the margins of the whorls darker and more regular. 
BItTiuM TRICARINATUM. 
Shell light, thin, shining, turreted ; whorls eight, carinated by three 
spiral ribs, interstices finely spirally striated and ornamented by lon- 
gitudinal ribs which are somewhat curved, rather distant, and become 
granulose at the crossing of the transverse ribs, giving the shell a cla- 
thrated appearance ; aperture oval ; columella arcuate, and twisted at 
lower part ; base subplanulate and ornamented with diverging raised 
striz. Colour brown. 
mv. RIPHORIS TRITICEA. 
hell minute, fusiformly ovate, ornamented throughout by spiral 
rows of regular-sized granules; aperture oval and in a line with the 
axis of the shell, lip slightly recurved and thickened (plicate on the 
inner side?) ; canal posterior, enclosed, tubular. Colour dark pur- 
plish-red, granules dusky white. 
TRIPHORIS FUCATA. 
Shell elongate subulate ; whorls sixteen to eighteen, with three 
No. 444. — ProcreepinGs or THE ZOOLOGICAL SOCIETY. 
