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Guppy Reprint 
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orbicular in shape. There is also .some likeness between our 
shell and Anatina globulosa Lam. 
2. Lithodomus bipenniferus Guppy (PI. vii., f. 14). 
L. bipenniferous Gupp}^ Proc. Scient. Assoc. Trinidad, 
1877, p. 155- 
Described in m3' list of Molluska from the Gulf of Paria. 
Several species of Lithodomus have been described from the 
Westindies ; but none that I know of possessing the peculiar 
characters of this shell, which appears to be mo.st nearl3" 
allied to the L. caudigerus of West Africa. It is found in 
almost ever}' piece of limestone and coral in the Gulf. 
3. Metiila lintea n. sp. (PI. vii., f. 18). 
Regularl}' fu.siform, imperforate, cancellated b}' longitudinal 
and revolving lines — the latter stronger on the lower w^horls, 
the longitudinal ones more evident above ; spire-turreted, 
whorls eight, graduall}' increa.sing, slightl}- convex, the first 
two smooth, the last forming more than two-thirds of the 
shell ; suture subcrenate, bordered, aperture elongate ; colu- 
mella truncate, simple or slightly twisted, covered with a 
thin callus spread along the bod3^-whorl to the outer lip, 
which is thin and sharp, thickening backwards into a varici- 
form ridge. Length 27 mill., breadth 10 mill. 
Dredged b}' Mr. W. O. Crosb}^ in the Gulf of Paria. 
Allied to M. cancellata Gabb, of the Miocene of Haiti and 
Jamaica. Our single specimen is di.stinguished from M. cati- 
cellata by its very much finer ornamentation, and by the 
absence of varices ; the thickening near the mouth showing 
onl}^ the incipient existence of the variciform tendency. 
4. Pleurotoma mirandan. .sp. (PI. vii., f. 19). 
Fusiform turreted, whorls about eight, angulated, narrow- 
