102 Records of ihc Indian Museum. [Yor-. XIY, 



Type, — Potnmon martensi (Wood-Mason). i 



The species of this subgenus bear a ck)se oeneral resemblance to 

 those of Paratelphusa s.s.. but are distin,G;uished b}- the different form 

 of the mandibular palp. In Miss Rathbun's monograph - Paratelphusa 

 is reuarded as a subgenus of Potamon and comprises species belonging 

 both to Paratelphusa s.s., as defined by Alcock and to Acanthopotamon. 

 It also includes P. niloticum and two allied forms, which are perhaps 

 derivatives of Potamonautes, and P. antomjUensis ^^hich appears to have 

 been evolved from (kotelpJiusa. 



1 Potamon (Acanthotelphusa) martensi. Alcock, Cat. Indian Decap. Crust., Potamo- 

 nidae, p. 68. fig. 52 (1910). 



2 Rathbim, Nunv. Arcli. il/«.s. Pari.^ (4) VII, p. 228 (1905). 



