CERITHIUM. 77 
with numerous transverse strie; fulvous ash- 
colour, marbled by red or brown; a rather spinous 
series of tubercles girds the middle of the whorls ; 
canal short, slightly turned backwards; sutures 
crenulated. 24. W. 27. 152. 
C. opexiscus. Turreted, ventricose, with 
three rows of. granulated strie, and the sutures 
tuberculated; greyish tawny, spotted with red 
and brown; pillar with one tooth; beak ascend- 
ing. 2. W. 27. 142. 
C. RETICULATUM. Elongate, turreted, with 
longitudinal ribs, and four transverse grooves on 
each whorl, forming uniform flattened tubercles 
all over; pale brownish, beak very small, almost 
obsolete. % B. W. 28. 165. 
C. atuco. Whorls smooth beneath, above 
with a series of ascending spinous tuberculations ; 
whitish, spotted and streaked with red and black ; 
canal recurved. 2. W. 27. 146. 
C. RADULA. Turreted, brown; whorls with 
four or five rows of granulated striz, of which, 
when adult, the middle changes into sharpish tu- 
berculations; sutures indistinct; beak short and 
straight. 2. 8S. 377. 
C. asperuM. Turreted, with plaited longi- 
tudinal muricated ribs, and transverse strie; 
white, beak long and ascending; pillar with one 
plait. 13. W. 28. 159. 
