194 J. Woocl-Mason— On Telphusidce. [No. 2, 



correspond exactly with the triangular process of the epistoma in 

 other species of Telphusa, but is the greatly developed median palatal 

 ridge ; externally to each notch the posterior margin of the epistoma 

 forms two distinct lobes with granulated edges. The second 

 joint of the external maxillipedes is punctate and its external mar- 

 gin crenulated. The third joint is much broader than long and 

 has its external and anterior angles well rounded off and distinctly 

 granular ; the exopodite is crenulated on its internal margin. The 

 abdomen of the male differs greatly from that of Paratelphusa 

 spim'gera, having the form of an isosceles triangle. 



The chelipedes are greatly unequal in size, both in males and 

 females, especially in the former ; the meropodites have their 

 ventral angles rounded off as in Paratelphusa spim'gera, their outer 

 or posterior face rugose, their posterior angle also rugose and 

 armed with a sharp spine arising just proximally to the constric- 

 tion near the distal articular end ; carpopo elites faintly rugose 

 above, armed with a single excessively long, stout spine ; penulti- 

 mate joint obsoletely tubercular above, externally and internally 

 all but smooth ; in the larger claw a considerable hiatus exists 

 between the dentated margin of the prolongation of this joint and 

 that of the dactylopodite, which in the smaller claw is through- 

 out its length in complete contact with the immoveable arm of the 

 pincers. 



The terminal joints of the ambulatory legs are extremely slender, 

 acute, and armed with fine sharp spines. 



Breadth, 42 mm. 



Length, » 31 mm. 



Hah. Mandele and Prome, Upper Burma. 



Plate XL Fig. 1. Paratelphusa Pay ana, of the natural size; 

 2. Front view. 3. External view of right chela. 4, External 

 maxillipede. 5. Abdomen of the male. 6. The same of a female. 



Paratelphusa spinigera, PL XII, Pigs. 1-4. 



' Thelphusa spinigera' White, MSS. List of the specimens of Crustacea in 

 the collection of the British Museum, p. 30, (no description). 



Carapace very greatly broader than long, smooth except on the 

 postero-lateral margin which bears numerous wrinkles ; these are con- 



