260 Records of the Indian Museum. [VoL. V, 
Post-orbital crests prominent Rae 
4 ~ Post-orbital crests low, indistinct, 
or obsolete .. 6 
(Epigastric and post-orbital portions 
of crests either continuous or 
| almost in line be -2 (DARYTELPHUSA™ —/( Actas 
Malay Archipelago, 
5 4 Africa 2). 
| . . . . 
| Epigastric portion in advance of 
| and slightly overlapping post- 
| orbital portion of crest 7 
(Exopodite of external maxillipeds 
| strongly flagellate i .. OZIOTELPHUSA? (Asia, 
Mauritius). 
| Flagellum of exopodite of external 
maxillipeds vestigial or absent! | PHRICOTELPHUSA? (Asia). 
(Exopodite of external maxillipeds 
\eartlagellate fas): me . LIOTELPHUSA” “(ASiae 
6 J Malay Archipelago, 
Australia). 
| 
| Exopodite of external maxillipeds 
non-flagellate s¢3 .. GLOBITELPHUSA® (Asia). 
Subfamily PSEUDOTELPHUSIN#. 
This subfamily is restricted to the New World. 
The mandibular palp is like that of the Gecarcinucine: the 
abdomen of the adult male is like that of the typical Potamonine. 
Miss Rathbun bases the subfamily on the form of the merus 
of the external maxillipeds, which is said to be not so broad as 
usual and more obliquely-cut or emarginate internal to the inser- 
tion of the flagellum, and on the reduction of the exopodite of 
these appendages. 
As regards the form of the merus, it is very variable within 
the limits both of the Potamonine and of the Gecarcinucine. 
As regards the exopodite, there are Potamonine in which the 
flagellum is absent, and there are Gecarcinucine in which not only 
is the flagellum absent, but also the peduncle is much reduced. 
More than this: in the Gecarcinucine subgenera Phricotelphusa 
and Globitelphusa there are to be found exopodites of all lengths 
down to less than half the length of the ischium, and in Phricotel- 
phusa gageit the exopodite may be flagellate or non-flagellate on 
one side or on both. 
If the Pseudotelphusine are to be separated from the Gecarci- 
nucineé, which is a questionable proceeding I think, the separation 
must depend on the form of the abdomen of the adult male and of 
its appendages. 
1 In Phricotelphusa gageiit, a Sikkim species, a slender davaiteita may be 
present on the exopodite of one or both sides. 
2 Subgenus of Paratelphusa. 
