6o 
Bulletin 35 
208 
Page 76 
not however take that view. One beautiful example has 
the transverse costellae ^larger and more distant than the 
spiral ones, the latter being thread-like 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. viagnifica Sow. ; but there are points of resem- 
blance between it and Sc. deaissata, raricosta, and lineata. 
None of the recent Westindian species bear anj^ 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 all}' of the Jamaican fossil may 
perhaps be found in Sc. tenuistriata 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 b}* a deep notch or canal 
from the thickened and somewhat everted outer lip. 
Length nearly 2 mm., breadth about i. 
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. setnistriata, which was described by D’Orbigny as a 
recent shell from Jamaica. 
Naticina regia n. sp., PI. II, f. 6.* 
Oval oblong, spirally striated b}" fine equidistant grooves, 
which are crossed bj” 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, ver}' partiall}' hidden by the everted columella 
[*Geological Magazine, vol. ii, 1874, pi. 17.] 
