''GUPPY- — LAND AND FRESHWATER SHELLS OF SRXNIDAD. 17 
Tuesday 9 th April 1872„ 
Henry William Caird Esq, M.A., President, in the Chair. 
The following Donations were announced : — 
“ Semiweekly Gleaner” of Jamaica ; ETo. . — Pre- 
sented hj the Rev. Dr. Croslcerry. 
“ Journal of the Society of Arts” — ETos. 1005 to 1008.— 
Presented by the Society. 
The following communications were read : — ■ 
1 . A letter from the Chicago Academy of Sciences, re- 
specting the losses sustained by them in the late Eire, and 
the desire of the Academy to receive donations of books and 
objects towards the re-establishment of their library and 
museum. 
2. Third Series of Additions to the Catalogue of the Land 
and Freshwater Molluska of Trinidad ’.with a revised 
List of all the Species. — By B. J. Lechmere Guppy. 
E.L.S., E.G.S., &o. 
In the first volume of the Proceedings of the Scientific 
Association, I have given a Catalogue of the land and 
freshwater molluska found in the island. Since the last 
additions made to this list, I have discovered several new 
species, some of which have been described : and acting 
upon the principle which the Association desires to be 
recognized, that all that is known of the natural produc- 
tions of the island should be placed on record in its Pro- 
ceedings, I now communicate the names of those species, 
together with descriptions of some previously undescribed. 
As the correspondence which has arisen out of my pre- 
vious publications on this subject has necessitated certain 
changes in nomenclature, I take the opportunity of ap- 
pending a list of all the known species, with the names 
corrected according to the latest information I possess, 
