oa 



Gastric region well defiued by a deep-cut cervical groove which, however, 

 becomes suddenly indistinct just behind the post-orbital crests. Except for the 

 furrow-hke continuation of the mesogastric area there is no areolation of the 

 gastric region, but the epibranchial region is very distinctly bisected by an 

 oblique groove. 



Epigastric crests sharp, forming a common curve with the trenchant, 

 obliquely-directed post-orbital crests, but separated from them by a short break. 

 The post-orbital crests are continuous with the well-defined lateral epibranchial 

 tooth. 



Front, in adults, between one-fourth and one-third the greatest breadth of 

 the carapace, considerably deflexed, its edge remarkably sinuous in four distinct 

 lolies, the outer of which form strongly pronounced angles with the orbits. 

 Upper orbital margin sinuous ; outer orbital tooth salient, separated from the 

 lower border of the orbit by a wide notch. 



Antero-lateral borders of carapace crenulate, not cristiform ; lateral epi- 

 branchial tooth distinct. 



In the male abdomen the length of the 6th segment is half its greatest 

 breadth, and the 7th segment is hardly as long as broad. 



The merus of the external maxillipeds is slightly broader than long. The 

 mandibular palp is simple ; the exopodites of all the maxillipeds have a strong 

 flagellum. 



Chelipeds of adult male greatly, of female not very greatly, unequal ; their 

 surface is pitted, but is otherwise remarkably smooth ; inner angle of carpus 

 with the usual bicuspid spine ; fingers about as long as palm, those of the larger 

 cheliped gaping when the tips are apposed. 



Legs about as long as the smaller cheliped ; the dactyU are longer than the 

 propodites ; in the 2nd and 3rd pairs the propodites are about twice as long as 



broad. 



In the largest male the carapace is 11" inch long, 2tV inches broad, and 



Hths inch deep. 



8180 

 6 ■ 



Mergui. Dr J. Anderson. 2 (J , 1 $ . 



29. POTAMON (PoTAMON), (sp. ? ) 



A single small, but undoubtedly adult, female from Persia or Baluchistan 

 appears to belong to the larnaudii group. The carapace is iiths inch long and 

 1 inch broad. It is not any variety of Potamon fluviatile, and if it is normal it 

 represents a species of the larnaudii group. 



5il^. S. Persia or Baluchistan. W. T. Blanford. 1 ? . 



10 



