HILL-— FISH-POISONS . 
237 
green in tire body, and golden yellow in the fins and tail. 
They had never been known to be hazardous eating, they 
were taken in profusion, and were probably part of a shoal 
adventitiously seeking our coasts. In considering this oc- 
currence it seemed to me that parrot fishes, — the scaruses, - 
owe their extraordinary intensity of hues to Bromine, and 
that this corrosive matter, having assumed some unusual 
compound form, was immediately pernicious and destruc- 
tive. The scaruses from their brilliant colours, — seldom 
softening into tints, are ordinarily deemed to be suspicious 
fishes, but the chrysopterus being of a subdued hue was 
not on this occasion a subject for caution. We must con- 
sider too that a great number together of scaruses had been 
fried, and that circumstantially an irritant character may 
have been acquired on this occasion. 
Tuesday , 8 th December, 1868. 
B. J. Lechmere Gtjppy, F.L.S., F.G.S., &c., President, in 
, the Chair. 
The following communications were read : — 
1 . Further Additions to the Catalogue of the Land and 
Freshwater Molluska of Trinidad. By B. J. Lechmere 
Guppy, F.L.S., F.G.S., &c. 
In my last communication to the Association on the sub- 
ject of the landshells of Trinidad, I stated that I had dis- 
covered some inoperculate species which would form the 
subject of a future paper. I am now able to redeem my 
promise ; the species then referred to, together with others 
obtained during a visit to the heights of Aripo, having 
since been described in the “ Annals and Magazine of 
Natural History.” In the present paper are also included 
