62 



tion between the epigastric crests form the only distinct areolation of the 

 carapace. 



Front much deflexed, about one-third the greatest breadth of the carapace 

 in the adult, its sides convergent, its edge well defined, almost smooth, and 

 broadly and obscurely bilobed. Lower margin of orbit sinuous, crenulate, 

 separated from the external orbital tooth by a gap. 



Antero-lateral borders of carapace convex, longer than the posterolateral 

 borders, well-defined, cut into four broad acuminate teeth (exclusive of the 

 orbital tooth). Some fine, short, ripple-like markings cross the postero-lateral 

 borders. 



Epigastric crests blunt, overlapping and slightly in advance of the post- 

 orbital crests. Post-orbital crests low but fairly sharp, cut by the cervical 

 ('•roove into two portions, of which the inner is nearly transverse and the outer 

 is obliquely convex. 



In the abdomen of the adult male the 6th segment is twice as broad as 

 long, and the 7th is not quite as long as broad. 



The mandibular palp is simple like that of Potamon, and quite different 

 from that of the type species of the genus Paratelphusa. 



All the maxillipeds have strongly flagellate exopodites. In the external 

 maxillipeds the ischium is longitudinally grooved, and the merus is subquad- 

 rangular and broader than long. 



Chelipeds very unequal, most so in the adult male ; their sm-face is 

 practically smooth, though with a lens pittings and faint reticular markings are 

 visible ; the subterminal spine of the upper border of the merus is strong ; the 

 strong spine at the inner angle of the carpus has a small accessory cusp at its 

 base ; the fingers have strong, almost molariform teeth. In the smaller cheliped 

 the fingers are much longer than the palm and do not gape; in the larger 

 cheliped they are a little longer than palm and gape when the tips are apposed, 

 especially in the adult male. 



Legs stout, a little shorter than the smaller cheliped ; the propodites 

 are more than twice as long as broad, and are slightly shorter than their 

 dactyli. 



In an adult male the carapace is lA inch long, 2^ inches broad, and iiths 

 inch deep. 



