62 
Long. 2°60; lat. 1 poll. 
Hab. ad insulam Zebu (Daleguete). 
It is to be regretted that no specimens of this very remarkable 
species should have been preserved with the soft parts; it being 
probable that the fissure in the last valve and in the posterior part 
of the margin is accompanied by some anatomical peculiarity in the 
animal sufficient to establish its claim to generic distinction. 
Found under stones at low water. 
Curron coarcratus. Ch. testd elongatd, postice coarctatd, sub- 
tunicatd; valvis reniformibus, subdisjunctis, carinatis, asperis ; 
carind dorsali levi ; margine levi. 
Long. 1; lat. *50 poll. 
Hab. ad insulam Bohol, Philippinarum. 
From the peculiar shape of the valves, and the comparative small- 
ness of the portion which remains uncovered, the observer would be 
led to look for the small tufts of hair found in the margins of some 
similarly-shaped species. All the specimens, however, have the 
margins perfectly smooth. 
Found under stones at low water. 
July 27, 1841. 
In consequence of there not being a sufficient number of Members 
present to constitute a quorum, no Meeting took place. 
