EIVER CEABS 77 



wMch Krauss found at a waterfall in Natal, is yellowish 

 and orange-coloured, in accordance with the cushions of 

 moss among which it has its residence. Thelphusa 

 dehaanii, White, occurs in the paddy fields of Japan, and 

 has been taken at an elevation of 2,500 feet above the sea- 

 level. It has been already mentioned that the river crab 

 of Europe is good eating. Milne-Edwards supposes that 

 it was to this crustacean that Aristotle referred under the 

 name Carcinus Heracleoticus. 



Paratelphusa, Milne-Edwards, 1855, was at first sup- 

 posed to be a marine genus, but has since been proved to 

 be an Indo-Malayan genus of fresh-water crabs, several 

 species of which have been described by Mr. Wood-Mason. 

 They differ from the rest of the Thelphusidae in having the 

 distal end of the fourth joint of the chelipeds armed with 

 a sharp spine, and are also said to have a greater general 

 resemblance to some of the Gancridee. 



Dr. de Man. in his elaborate Eeport on the Podoph- 

 thalmous Crustacea of the Mergui Archipelago (' Journ. 

 Linn. Soc' 1887, 1888), includes the genus Thelphusa in 

 the next tribe, and the same arrangement is followed by 

 Dr. Camil Heller in his ' Crustacea of the Novara,' 1865, 

 the Thelp^usinea being in fact intermediate in structure 

 between the Cancridae and the Gecarcinidse. 



