348 



Records of the Indian Museum. [Vol. XVI, 1919.] 



of T. orientalis of similar size it is rather more than three times. 



The carpi and propodi of the first 

 two walking legs are thickly coated 

 with short woolly hair. 



The excavation in the lateral 

 margin of the fifth abdominal seg- 

 ment of the male (text-fig. 21) is a 

 Httle shallower and the distal parts 

 of the same margin are less conver- 

 gent anteriorly than in T. orienta- 

 lis. 



The carapace of the type male 

 is 4"o mm. in length and 5*3 mm. 

 in anterior breadth. In life it was 

 uniformly grey in colour, with white 

 fingers to the chelae and with dark 



spots on the merus, carpus and propodus of the walking legs. 



Text- fig. 21. — Tympaiwmcrus 

 gaiigeticjis, sp. nov. 



Abdomen of male. 



Kaikal Marec, near jnnc- 

 tion of Matlah and 

 Biddah Rs., Gangetic 

 delta. 



Matlah R., opposite Poit 

 Canning^, Gangetic delta. 



S. Kemp ; Dec. 1916. 



Bengal Fish. Dept. (B. 

 Prashad); March, 191 8. 



One. 

 Type. 



One. 



The water in both these localities probably contains some 

 admixture of salt at all seasons. The specimens were found on 

 banks of soft mud between tide-marks and the specific gravity of 

 the water in the locality where the type specimen was taken was 

 1-0105 (corrected). 



Tympanomerus ceratophora (Koelbel). 



iScj8. Dioxippe ceratophoi'a, Koelbel, in Il'/.v.s-. Ergebn. Reise (Jnifeii Beta 

 Szectienyi in Ostasieii II, p. 573, pi. i, Hgs. 8-12. 



1918. '/'vrnpanojuenis ceratoptiora, Tesch, Decap. Rracliyitr. ' Si'boga ' Ex- 

 pect. I, p. 50. pi. 2, fig. 2. 



Hongkong (Koelbel) ; River near Pidjot, Lombok (Tesch). 



