366 PROCEEDING OF THE SCIENTIFIC ASSOCIATION. 



ing place, there were a number of Trigona Mactroides, the 

 valves united but the animal invariably gone they had ap- 

 parently been gathered for cooking, and, after boiling, the 

 meat had been taken out without breaking the hinge. The 

 same remark applies to the Asiphis rugosa and the Venus 

 crenulata also found here in considerable numbers. I saw no 

 other shells here than those four sorts. The bottom of this 

 bay is probably too calm to allow of shell fish or dead shells 

 being driven ashore on its beaches. 



Tuesday, 9th February, 1869. 



R. J. Lechmere Gltpy, F.G.S., F.L.S., President, in the Chair. 



Edward Johnston Hammond, Esq., M.R. C.S.,L. was 

 elected a Member. 



The following communication was read : 



Notice of sonic new Marine Shells found on the Shores 

 of Trinidad. By R. J. Lechmere Guppy, F.L.S., F.G.S. &c, 



Purpura trinitatensis n. sp. 



A solid ovate yellowish subrimate shell adorned with nu- 

 merous rounded Bpiral ridges which are crossed by fine im- 

 bricating Whorls about 6, with 4 spiral rows of ob- 

 it ire elongated tubercle^ of which the two upper rows are 

 much the largest, the ior one forming the angle of the 

 whorls. Suture hidden by a row of stout curved and re- 

 fleeted lamellae, of which there are about 3 above each of the 

 tubercles on I le of the whorl. Spire conic, sharp. 

 Mouth pink within and often ornamented with two or three 

 more or ht.i interrupted Bpiral red or chestnut lines corres- 

 ponding to the external rows of tubercles. Aperture oval 

 with a small and decided posterior canal forming the succes- 



