10 PROCEEDINGS OF THE SCIENTIFIC ASSOCIATION- 
2. Catalogue of the Land and Freshwater Jfollusca of 
Trinidad. 
By B. J. Leclimere Guppy, F.G.S. 
Few of tlio terrestrial or fluviatile shells of Trinidad 
seem to have boon noticed before 1864. Some years pre- 
viously Mr. Theodore Gill visited this island and collected 
the Mollusca, which were determined by Mr. Bland of 
Now York, who, in a paper on tho geographical distribu- 
tion of tho West Indian land-shells, gave a list of all tho 
terrestrial mollusca, thirteen in number, known from this 
island. None of these were regarded as peculiar. Two of 
tho shells enumerated I liavo not found in tho island, and 
one ( Plehocheilus auris-sciuri) I have regarded as distinct 
from the species to which it was referred. But I havo ob- 
tained nineteen species not mentioned by Mr. Bland, mak- 
ing a total including two freshwater gasteropoda alluded 
to by Mr. Bland of thirty-two species.* 
In 1864 I published in tho “ Annals and Magazine of 
Natural History’ 7 an account of somo of the new species of 
operculato land and freshwater shells, and in tho number 
of tho “ Annals” for January 1866, I gave a list of all the 
species known to mo, accompanied by descriptions of a few 
species of inoporculata which woro new, and by remarks on 
tho lingual dentition of tho species. On this latter part of 
malacology a paper by Mr. Jabcz Hogg and myself was 
read to tho Linnoan Society on the 21st June last. 
As it is one of the principal objects of this Association to 
place on record whatever is known of the natural produc- 
tions of the island, I make it my duty in the present com- 
munication to lay before it a list of all the land and fresh- 
* Besides three species of AuricuUl > included in the present 
catalogue. 
