48 
ZOOLOGY OF THE VOYAGE OF H.M.S. SAMARANG. 
In colour this pretty and curious genus is of a pale yellow, marbled with light pinkish 
brown on the lateral regions of the carapace, and a broad scarlet longitudinal stripe extending 
from the front to the hind margin, narrowed opposite the orbits and in the middle of the 
back. The fore-legs are marbled with scarlet and yellow, with a broad scarlet band in the 
middle of the fifth joint, and two broad bands of the same colour on each claw. The 
hind-legs are light pinkish yellow, with broad transverse scarlet bands. 
3. CHARYBDIS, Be Haan. 
1. CHARYBDIS DURA, Adams Sr White. 
Tkorace valcle duro, Isevi, marginibus lateralibus quinque-dentatis, primo et secundo dentibus ad basin 
denticulo minuto instmcto. 
Fronte sex dentibus obtusis, donte externo prominentiore quam in speciebus aliis. 
Chelis carpo externe scabro, tuberculato, interne spina longa erassa in medio, manu margine superiore 
spinis sex in serie duplieata parallels dispositis, externe carinis tribus longitudinalibus. 
Pedibus posterioribus externe spina magna, prope extrenaitatem. 
Hab. Mauritium. 
Carapace very hard and smooth, lateral margin five-toothed, the first and second teeth 
with a minute tooth at the base. 
Front with six large bluntish teeth, the external tooth rather more prominent than 
in the other species. 
Fore-legs with the fourth joint rough and tubercular on the outside, with a very long 
thick spine on the middle of the inside, the fifth joint with six spines, in two parallel rows, on 
the upper edge, and three longitudinal keels on the outside. 
Hind-legs with a large spine on the outside near the end. 
Hab. Mauritius. 
VI. OCYPODIDtE. 
Species of Ocypode and Gelasimus are extremely numerous throughout the islands of the 
China Sea. Every sandy shore is perforated above high-water mark with the holes of the 
former, and the banks of the rivers, the mangrove swamps, damp forest margins, and muddy 
places near the sea, are peopled with the latter, which form oblique burrows frequently 
penetrating to a considerable depth. The Ocypodes appear to be chiefly crepuscular in their 
habits, remaining concealed in their holes during the heat of the day, but as evening 
approaches run nin g side-ways in a curvilinear manner at the edge of the sea, where the 
waves break along the sandy shores. The Gelasimi remain concealed in their burrows 
during the high tide or in the dry hot part of the day, but delight to come out of then holes 
after a shower, or when the tide has receded and left their mud banks moist, but they never 
