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Show 322 MR. R. J. L. GUPPY OS BULIMUS CONSTRICTUS. [Apr. 20, guish from A. candeana, Orb., found in Cuba and Jamaica, in the latter island receiving the name of Melania spinifera Ad. Diplom-matina huttoniis presumed to be identical with an Indian species, as already noticed. Blandiella redusa (as well as Hyalina alicea) has hitherto only been found in one of the wildest and least-explored parts of Trinidad, but may very likely occur in the mountains of Venezuela. The genus Blandiella is intermediate between Truncatello and Geomelania, and is said to be synonymous with Taheitia. Cistula aripensis, though quite distinguishable from, is very nearly related to Chondropoma tamsianum, which occurs in the hills of Venezuela opposite to Trinidad along with Cylindrella trinitaria and Helicina barbata. It may be doubted whether the distinction between Cistula and Chondropoma is a real difference. Helicina nemoralis is allied to H. columbiana oi Venezuela; and H. ignicoma is very near to H. plicatula, found in Cuba, Guadeloupe, &c. The two remaining freshwater bivalves of the list, though not hitherto found elsewhere, scarcely call for remark, especially when we take into consideration that, as a rule, the freshwater shells of the West Indies are of South-American types. Thus we have seen that, with the exception of the Diplommatina and of Pupa bicolor, the molluscan fauna of Trinidad is almost entirely South American, and that very few of the species are of Antillean origin. From the present list I have excluded Bulimulus fraterculus and B. multifasciatus-the shell considered to be the former being B. tenuissimus, and the B. multifasciatus of Trinidad being only a form of B. vincentinus, and not the true B. multifasciatus Lamarck. The distribution of the amphibious Pulmonata and Truncatellidee is similar to that of the marine mollusca, and has therefore been left out of account in the foregoing paper. The following only have been found in Trinidad:- Melampus coffea, Linn. Siphonaria lineata, Orb. pusillus, Gmel. Truncatello pulchella, Pfeiff. Pedipes mirabilis, Megerle. In conclusion I should acknowledge my obligations to Mr. Ralph Tate, F.G.S., for information as to the occurrence in South America of several species previously only known from Trinidad. 2. Note on a Variety of Bulimus constrictus found in Venezuelan Guiana. By R. J. L E C H M E R E GUPPY, F.L.S., F.G.S., &c. [Eeceived March 30, 1875.] This variety may be described as follows:- B U L I M U S CONSTRICTUS, var. TATEANUS. Shell oblong-conic, rather thin, minutely cancellate, white under |