78 
PROCEEDINGS OE THE SCIENTIFIC ASSOCIATION.' 
Cancellaria scalatella n. sp. PI, II, f. 4. 
T arreted, umbilicafce, spirally striat9 by numerous close 
spiral threads more elevated on the stout rounded longitu- 
dinal variciform ridges of which there are 6 or 7 on a 
whorl. Suture very deeply sunk. Whorls about 7, slightly 
rounded, angulate and crowned above by the ridges. 
Aperture almost triangular, rounded above, angular and 
formed into an obsolete canal anteriorly. Outer lip sharp, 
grooved within. Inner lip continuous, thin, sharp, 
slightly reflected and bearing two folds. Base angulate, 
perforated by a small round umbilicus. 
Belated to C. varicosa Brocchi (Miocene. Piedmont) ;• 
but smaller and of somewhat stouter figure. The spiral 
striae are coarser, and the peristome is finely grooved 
instead of being coarsely dentate only. In C. varicosa 
the spiral striae are crossed by very fine longitudinal ones, 
which clo not exist in C. scalatella. The most striking 
difference however is that the whorls are rounder and the 
suture much more deeply sunk in C. scalatella , whilst the 
longitudinal ridges project upon the angle of the whorls so 
as to give a coronate appearance. 
The three Caneeliariae hitherto described from the Ja- 
maican miocene are all akin to European fossils of the 
same date; hut two of them belong to the type of the re- 
cent C . reticulata , The present is of more decidedly mio-- 
cene aspect than either of the three previously described. 
Omlum immunitum n. sp, PI. I, f. 7. 
Fusiform-elongate, pointed at both extremities. Outer 
lip thickened, extending in a nearly regular slight curve 
from the posterior to the anterior canal ; slightly dilated 
anteriorly. Inner lip with two strong folds at the ante- 
rior end. Aperture as long as the shell ; narrow posterE 
