CRTTSTACEA. 
73 
Gentts, Gelasimus. 
“ Poot-stalk of the eye long and slender, the transparent cornea 
small. Carapace resembling that of Qonoplax, but more ad- 
vanced in front, and less extended laterally. 
This family (by Genus) is by Dr. M. Edwards placed among 
the Ocypodidm, but is here coupled with Gonoplax from the great 
similarity of form and habit of the following species. _ _ 
In the history of Crustaceans by Dr. M. Edwards, no notice is 
given of any species of this Genus as found in the European 
sens ; and therefore I feel some hesitation in assigning to it a 
species frequently found in the stomach of fishes taken in depths 
varying from five to more than twenty fathoms, but of which no 
figure is found in the works of Pennant or Lea^. 
The form of the Carapace is represented by Dr. M. Edwards, 
pi. 18 fig. 10, and consequently much resembling that o± 
Gonoplax ; but that of the present species differs from the figure 
by that gentleman in possessing a second and well-marked hook 
on the lateral margin a little behind the anterior angle, and at the 
place where in the Gonoplax hispinosa there is a protuberance 
much less marked, but giving origin to the trivial name. Both 
claws are of equal size and less than the transverse breadth ot 
the carapace. The eye-stalks are concealed in the manner of 
Gonoplax-, but as the carapace is more advanced at the separa,tion 
of the ocular cavities, when withdrawn, their extremities point a 
little backward. 
I find but little difference in the form of the male and female, 
and none in the proportion of the claws, though such is the case 
for the most part in Crustaceans. I have provisionaUy desi^ated 
it G. Bella (Couch MS and fig.) in honour of the professor 
of Zoology in Kings’ College, whose labours have been eminent 
in this department of science.” 
GRAPSIB^. 
Gentts, Plaices. — Beach. 
,, Nautilograpsus. — Edwards. 
,, Paehysoma . — De JIaan. 
Carapace quadrate, straight in front, rounded posteriorly. 
Orbits placed at the latero-anterior angles, space between the eyes 
iialf the width of the carapace. First pair of legs chelate robust. 
