42 Mr. R. J. L. Guppy on the Terrestrial and 
continuous with a streak on the side of the breast. Elytra 
tapering from base to apex, each elytron ending in a straight 
point, the sutural edge being also nearly straight; surface 
shining brown-black, punctured (except towards the apex), and 
marked on each with two tawny vittee, the ner one of which is 
severed after the middle, the severed ends oblique and running 
parallel for a short distance; suture towards the base and disk 
marked with faint silky grey lines. Body beneath shining 
black, clothed with fine silky greyish pile; abdomen with three 
tawny stripes. Legs black, clothed with silky tawny pile. 
Common on dead branches of trees at Kga. 
[To be continued. | 
IV.—On the Terrestrial and Fluviatile Mollusca of Trinidad. 
By R. J. Lecumere Gurry, Civil Service, Trinidad. 
THE most complete list of the terrestrial Mollusca of Trinidad 
which I have seen is that contained in a paper by Mr. Bland, 
“On the Geographical Distribution of the West-India Land- 
Shells”*. In this list are given thirteen land-shells; and men- 
tion is made, in the same paper, of two freshwater Mollusca. 
Of the thirteen land-shells enumerated by Mr. Bland I have 
only found eleven; but, besides these, I have found thirteen 
other terrestrial Gasteropoda; and in addition to the two fresh- 
water Mollusca, I have found five fluviatile Gasteropoda and 
one Conchifer, making a total number of thirty-two species of 
terrestrial and fluviatile Mollusca. 
In the ‘Annals and Magazine of Natural History’ for October 
1864+ I described some species of operculate Mollusca of the 
land and fresh waters of Trinidad. I now propose to complete 
and correct the list of the Operculata, and to give some account 
of the Inoperculata, so as to bring under view in one memoir 
the whole of the terrestrial and fluviatile molluscan fauna of the 
island. 
With regard to classification, I have done the best I could 
under the circumstances. There is so much confusion respect- 
ing some of the genera (e.g. Orthalicus, Subulina, Opeas, and 
others made from the old genus Bulimus), that 1 see no way of 
escaping the difficulties attendant on assigning the proper place 
to the species of those groups ; and until the classification of the 
Helicide shall be remodelled by competent authority, generic 
names must in some cases go for very little. I have therefore 
in this paper included one or two species in the genus Bulimus 
* Ann. Lyceum Nat. Hist. New York, vol. vii. 
t+ Ser. 3: vol. xiv. p. 243. 
