GUPPY — MOLLUSCA OF TRINIDAD. 
137 
Class CONCHIFEBA. 
Sub-class SlPHONIDA. 
Animal witb respiratory siphons. 
Order Yeneracea. 
Animal with a compressed foot adapted for creeping or 
leaping. 
Cyclas Bruguieres 1792. 
Fluviatile Conchifera with, thin ventricose nearly equila- 
teral shells having small cardinal and lateral hinge-teeth 
in both valves. 
Cyclas punctifera Guppy. 
Annals and Mag. Nat. Hist ., 3 ser. vol. xix., p. 160. 
A small somewhat ovate thin diaphanous whitish bivalve, 
'Concentrically striate and covered with numerous rather 
granular points. The length of a large example is 4 mill., 
its height 3£ mill., and its thickness 2|- mill. I am indeb- 
ted for the first example to Mr. Presto© who discovered it 
whilst we were engaged searching for mollusca in a pond at 
St. Ann, where I have found additional specimens. 
Tuesday 14 th May, 1867. 
Alexander Williams Anderson, Esquire, in the Chair. 
Henry Krebs, Esq., St. Thomas, and the Hon. Georg© 
Webbe, F.B. A.S., Nevis, were elected Corresponding Mem- 
bers. 
The following communications were read : 
1. Documents relating to the Boehmeria nivea. 
(Abstract.) 
These documents consisted of a letter from the Foreign 
