73 PROCEEDINGS OF TEE SCIENTIFIC ASSOCIATION. 
not however take that view. One beautiful example has* 
the transverse costellae larger and more distant than the 
spiral ones, the latter being threadlike and rising upon 
the former. In this example the spiral striation of the 
base is also more marked. Sc: leroyi may be compared 
with Sc. magnified Sow. ; but there are points of resem- 
blance between it and Sc. decussata, raricc::a, and lineata. 
Kone of the recent "Westindian species bear any resem- 
blance to the fossil except in that general shape which is 
common to nearly all the members of the genus. On the 
whole however the nearest ally of the Jamaican fossil may 
perhaps be found in Sc. tenuisiriata Orb. (Bahia Blanca). 
Ringicula tridentata n. sp. 
Ovate-conic, moderately thick, smooth, shining. Spire 
conic. Whorls about 4, Aperture suboval : columella 
thickened and bearing two strong spiral plaits, the callus 
continued backward, and carrying a stout tooth on the 
body-whorl ; the latter separated by a deep notch or canal 
from the thickened and somewhat everted outer lip.- 
Length nearly 2 mm- breadth about 1. 
Distinguished from R. semistriata Orb. (Cuba shells, 
vol. ii, p. 103, pi. xxi, f. 17 — 18) by a wider mouth and 
less thickened outer lip. R. tridentata does not exhibit any 
trace of the striation which marks the anterior portion of 
R. semistriata , which was described by D’Orbigny as a 
recent shell from Jamaica. 
Nalieina regia n. sp. Pi. II, f. 6, 
Oval oblong, spirally striated by fine equidistant groc.oo, 
which are crossed by a few rather irregular lines of growth. 
"Whorls about 5, the last very large. Spire short, acumi- 
nate. Aperture semioval rather narrowed above. Umbili- 
cus round, very partially hidden by the everted columella 
