CEUSTACEA. 
49 
venture very far from their habitations. The clicking noise produced by snapping the 
claws of their larger fore-leg together, when made by many hundreds at a time, may be 
heard at some considerable distance. On the least alarm they retreat precipitately to their 
burrows. 
1. GELASIMUS, Latreille. 
1. GELASIMUS CULTBIMANUS, Adams fy White. 
Thorace kevi ; marginibus lateralibus rotundatis, sine carina acuta ab angulo cantlii externo. 
Fronte, inter oculos, lobo parvo rotundato, dilatato ; margine cantlii inferiore distincte crenulato ; 
chela majore digitis latis, finibus extrorsum curvatis ; digito inferiore in medio profunde sinuato, lobo lato, 
prope extremitatem margine serrato-crenulato ; digito superiore margine inferiore fere recto. 
Hab. Insulas Philippinas. 
Carapace with the upper surface smooth ; the lateral edges rounded, without any sharp 
keel from the outer orbital angle. 
Front, between the eyes, with a small dilated rounded lobe ; edge of lower orbit very 
distinctly crenated ; fifth joint of fore-legs with the claws wide, both slightly curved outwards 
at the ends ; the lower claw with a very wide sinus in the middle, a wide serrato-crenated 
lobe on the edge near the end ; upper claw with the lower edge very nearly straight. 
Hab. Philippine Islands. 
2. GELASIMUS CKASSIPES, Adams fy White. 
Thorace valde arcuato, postice subito coarctato. 
Tronic lobo sine pedunculo angusto. 
Pedibus posterioribus crassioribus et robustioribus quam in speciebus aliis. 
Hab. Insulas Philippinas. 
Carapace very much arched, suddenly narrowed behind. 
Front with a lobe, without narrow stalk. 
Four hind pairs of legs thicker and stronger than in the other species. 
Hab. Philippine Islands. 
3. GELASIMUS BELLATOB, Adams fy White. 
Thorace antice (prope insertionem canthorum pedunculorum) sinuato. 
Fronte in lobum rotimdatum subdilatata ; chelis manu digitis perlongis ; digito superiore lateribus 
subparallclis, margine. prope ad basin tuberculis duobus vel tribus ; digito inferiore infra marginato, acie 
ad basin sinus superficiali tuberculari, dente robusto lato ad extremitatem. 
Hab. Insulas Philippinas. 
Carapace, in front, just behind the insertion of eye-peduncles, sinuated. 
Front slightly dilated into a rounded lobe ; fifth joint of the larger fore-leg, with the claws 
very long ; the upper, or movable claw, with the sides nearly parallel, two or three larger 
o 
