( 148 ) 



Colours in spirit: chelipeds, legs and carapace livid yellow, the chelipeds 

 and legs sometimes dusky reddish. 



Length of carapace of a large female 31 millim. 



6. 



108 j 



4747 

 10 



8096 

 6 



Penang 

 Andamans 



Andamans or Nicobars 

 Mergui, 



P. Stoliczka 



J. Wood-Mason. (6). 



J. Wood-Mason. (14). 

 Dr. J. Anderson. 



Geographical range : from east Africa through the Malay and East 

 Indian Archipelago to the Liu Kiu Islands. 



BiRGUs, Leach. 



Biyus, Le&ch, Trans. Linn. Soc. XI., 1815, p. 337: Desmarest, Consid, Gen, Crust., 

 1825, p. 180 : Milne Edwards, Hist. Nat. Crust., II., 1837, p. 244 : DeHaan, Faun, Japon. Crust., 

 1849 p. 203; Dana, U. S. Expl. Exp., Crust., pt. I., 1852, p. 435: Stimpson, Proc. Acad. |Nat. 

 Sci. Philad. (1858) 1859, p, 232 : Boas, Vid, Selsk. Skr., 6 Raek., naturvid. og math. Afd. I., 

 2, 1880, p. !91 ; Henderson, Challenger Anomura, 1888, p, 49: Stebbing, Hist. Crust., 1893, 

 p. 156: Ortmann, in Bronn's Thier Reich, Malacostraca, p. 1147. 



Carapace contracted anteriorly as in anobiti, but greatly expanded 

 across the branchial regions where its breadth equals its length, well calci- 

 fied everywhere, though most strongly so in the gastric region. Rostrum 

 prominent. 



Eyestalks subcylindrical : ophthalmic scales juxtaposed, hidden beneath 

 the vertically deflexed subrostral end of the carapace, 



Antennular peduncle nearly as long as the carapace: the flagella com- 

 pressed, truncated at tip ; the upper very much longer and stouter than the 

 lower, 



Antennal peduncle compressed : the acicle fused with the 2nd joint : the 

 flagellum stout, but very long. 



The external maxillipeds are in contact at base : the exopodite of the ist 

 maxillipeds is non-flageliate, those of the 2nd and 3rd have a very short, 

 non-segmented flagellum. The endopodite (palp) of the ist maxillae is non- 

 flagellate. 



Both chelipeds are massive, the left more so than the right ; all the 

 joints are short, broad, and heavy : the fingers move obliquely but much 

 nearer to the horizontal than to the vertical. 



