S3 
GUPPY — JAMAICAN TERTIARY EOSSILS. 
S trombus bifrons Sowerby. 
Journ. Geol. Soc. vol, vi, p. 48, pi. ix, f. 9. 
Murex collatus n. sp. PL I, f. 8. 
Ovate, rimate, slightly flattened, adorned with numerous 
thin slightly fimbriate or crenulate varices often doubled 
especially the later ones; about 7 on the last whorl ; their 
interstices indistinctly crossed by low transverse costae 
which terminate in points on the varices ; the upper point 
large, acute and projecting, giving an angulate appearance 
to the shell : varices uniting below to form an irregular and 
contorted canal. Whorls 6 — 7, somewhat angulate. Spire 
sharp. Outer lip expanded and crenulate, obtusely dentate 
within. Pillar lip smooth. Length about 25 mm, Breadth 
about 15. Total length of last whorl including canal about 
18 mm. 
Yery closely related to If. calcitrapa Lam. (Eocene, 
Europe). It is smoother and the whorls less angulate. 
These shells belong to a small group of Murices which 
exhibits the connection through Trophon , Papana, 
Latiaxis , Sfc. to Purpura , If. collatus would perhaps be 
ranked by some conch ologists as a Trophon , as has already 
been done with If. cahitrapa , 
Typhis alatus Sowerby 
Journ. Geol. Boc. vol. vi., p. 48, pi. x, f. 4. 
A species almost as near to T. tubifer (Eocene, Europe) 
as Murex collatus is to If- calcitrapa. The living analogues 
of T. alatus are T. pinnatus and T. soiverbyi. 
Ancillaria pinguis n. sp. Pi. I, f, 3. 
Ovate conic, spire elevated, acuminate. Suture usually 
visible through the enamel which covers the spire and 
accompanied at a little distance by a keel the ridge of 
which is threadlike. Aperture suboval, elongate — XJxrp 5 
