'6 



maxillipeds the exopodites are longer than the ischium, the ventral surface 

 of the ischium is not longitudinally grooved, and the merus is broader than 

 long. 



Chelipeds unequal in both sexes — more so in the male ; their surface is 

 almost smooth to the naked eye, but the palm and fingers are pitted ; when 

 magnified their surface is reticulo-rugose. Upper edge of merus crenulate, but 

 without any trace of a subterminal spine. A coarse spine at inner angle of 

 carpus. In both chelipeds the fingers are stout and have broad concave tips, 

 the proximal teeth are enlarged and molar-like, and the distal teeth are small, 

 regular, translucent, and incisor like ; in both, the fixed finger is very broad, 

 the dactylus is curved, and the closed fingers gape to a certain extent (more 

 in the larger cheliped). At the base of the fixed finger of the larger chelae 

 — and sometimes of the smaller chelae also — one tooth may be enormously 

 enlarged. 



Legs stout, their joints broad; they are about as long as the chelipeds in 

 the male, but not in the female ; the dactyli are not — or very little — longer 

 than the propodites ; the longer propodites are about twice as long as 

 broad. 



In a large male the carapace is lyV inch long, IHf inch Inroad, and j^ths inch 

 deep ; the larger hand is If o inch long (the maximum length of the palm being 

 iths inch, the maximum length of the dactylus Hths inch), Hths inch high, 

 and VVths inch thick. 



6918 



3 ■ 



40U 



"T ■ 

 4019 



4 

 4043 



• "4 • 



4. Paratelphusa (Paratelphusa) sinensis, Edw. (Fig. 54.) 



ParaUl'plmm sinensis, Milne Edwards, Ann. Sci. Nat. Zool. (3), XX., 18.53, p. 213 : Mary J. Ratlibun, Nouv. 

 Ari'hiv. dii Museum (4), VII., IflOo, p. 241 {uhi tit.), pi. xi., fig. 7. 



Carapace convex, its length three-quarters to four-fifths its greatest 

 breadth, its depth half its length ; its surface pitted ; a few fine oblique wrinkles 

 near the poster o -lateral borders. 



Cervical groove just visible, Ijut very superficial and indistinct, sometimes 

 represented in places by a line of irreguUxr pits. 



Regions recognisable but not clearly defined. Post-frontal mesogastric 

 groove indistinct ; behind it the mesogastric area can be traced, though 

 extremely faintly, in almost all its extent. 



Front little deflexed, very broad, more than two-fiftlis the greatest breadth 



