45 
FUSUS alveolatus. 
TAB. DXXV.—fig. 1. 
Spec. Char. Turreted; volutions ornamented with 
two spiral obtuse carinae, crossed by thick ribs; 
beak half cylindrical, ribbed. 
Three rows of nearly square pits or cells are formed 
upon each whorl by the crossing of the carinae and ribs ; 
the last whorl exhibits several more carinae, which gra- 
dually diminish in size as they proceed upon the beak : 
aperture round, with an elongation into the beak. 
Found in the Suffolk Crag by Mrs. Cobbold and the 
Rev. G. R. Leathes : it is very scarce. 
FUSUS cancellatus. 
TAB. DXXV.— /g. 2. 
Spec. Char. Lanceolate, acute, covered with acute 
decussating ridges, with short spines at the 
points of their intersection ; volutions ventri- 
cose ; aperture oblong, produced into a short 
beak. 
Four or five spiral rows of cells appear upon each whorl, 
bounded by sharp divisions and short spines at their 
angles ; the spire is nearly twice as long as the aperture, 
which is rather contracted at its upper part. 
From the very rich cabinet of Suffolk and Norfolk 
Crag fossils, from which the Rev. G. R. Leathes has 
long and liberally supplied us. 
