Igo. | 
A. ALCcocK : Classification of the Potamonide. 
257 
SYNOPSIS OF GENERA AND SUBGENERA OF POTAMONINA. 
(Antero-lateral borders of carapace 
serrulate or crenulate, but not 
| strongly laciniate or spinose, 
{+ though there may be a sitgle 
| lateral epibranchial spine 
Antero-lateral borders of carapace 
strongly lanciniate or spinose .. 
Flagellum of exopodite of external 
maxillipeds strong 
Flagellum of exopodite of external 
maxillipeds vestigial or absent 
I 
( Post-orbital crests and lateral epi- 
| branchial spine very distinct 
3 < Post-orbital crests and lateral epi- 
branchial spine indistinct or ob- 
solete 
ea of front spinulose 
Edge of front entire 
(Epigastric and post-orbital erests 
| not continuous 
The epigastric and _ post-orbital 
crests of each side form an un- 
broken line .. 
Upper border of merus “of cheli- 
peds without a subterminal spine 
Upper border of merus of cheli- 
peds with a subterminal spine or 
tooth : 
( Antennal flagellum and terminal 
joints of antennal peduncle ves- 
; | tigial and hidden 
| 
| 
24 
| 
Antennal peduncle and flagellum 
normal 
Eyes and eyestalks normal 
7 Eyestalks somewhat tapering, eyes 
small ae a7 ee 
1 Subgenus of Pota:non. 
2 
~) 
PorTamiscus! 
China). 
(India and 
GEOTELPHUSA ! 
Malay 
Africa). 
HyYDROTELPHUSA (Mada- 
gascar). 
(Asia, 
Archipelago, 
5) 
POTAMON subgenus 
(Europe, Asia, Malay 
Archipelago, Africa). 
POTAMONAUTES! (Africa), 
PLATYTELPHUSA (Jy. Tan- 
ganyika). 
PARAPOTAMON (L,. Yun- 
nan Fu). 
7 
ACANTHOTELPHUSA 
(Asia, Africa). 
ERIMETOPUS (W. Africa). 
