102 Records of flie Indian Museum. [YoL. XIV, 



Type, — Potmnon martensi (Wood-Mason).^ 



The species of this snbuemis bear a ck)se general resemblance to 

 those of Paratelphusa s.s., but are distinguished bv the different form 

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

 is regarded as a subgenus of Pofamon 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. antongilensis ^^hich appears to have 

 been evolved from Geotelphusa. 



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

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



2 Rathbun, Ncuv. Arch. Mus. Paris (4) VII, p. 228 (1905). 



