255 



the fully extended body (with the rostrum) ; all their joints except the first and 

 last are more or less thorny ; the fingers are long, slender, and finely toothed, 

 being in the male a little longer than, and in the female about the same length 

 as, the palm. 



The second, third, and fourth legs have the anterior edge of the ischiopodite 

 and carpus thorny and the teeth on the posterior edge of the dactylopoditc 

 small. 



The abdominal legs of all but the first two pairs are rudimentary in the 

 male ; those of the first pair are absent in the female. 



Colours in life dirty white, or reddish, with orange red markings. 



The extreme length of the largest male is 51 millim. ; its chelipeds are also 

 51 millim. 



Northern end of Bay of Bengal, 193, 240, 272, 405-285 and 409 fathoms. 



Regd. Nos. -l (Types of the species) : ^: ^L 8 : ^21 : 4 -f? : 2" 

 24. Munidopsis iridis, Alcock & Anderson. 



Munidopsis iridii, Aleock and Anderson, Ann. Mag. Nat. Hist., Jan. 1899, p. 20. 

 ILLUSTRATIONS OF THE ZOOLOGY OF THE INVESTIGATOR, CRUSTACEA, PLATE XLIV. FIG. 1. 



Extremely closely related to M. margarita, Faxon. 

 There are no epipodites on any of the thoracic legs. 



Carapace subquadrilateral, convex, its regions well delimited and tumid, its 

 surface armed with numerous acute subsquamiform tubercles and symmetrically 

 disposed spines, of which a pair on the anterior part of the gastric region and 

 one in the middle of the cardiac region are slightly enlarged. 



Rostrum short, simple, triangular, carinate, its edges indistinctly serrulate 

 in their distal half ; anterior border of carapace armed with an acute spine at the 

 outer angle of the orbital notch ; lateral borders armed with four acute spines, 

 posterior border with several spines ; a i'ow of spinules above the postero-lateral 

 border. 



Second, third, and fourth abdominal terga transversely bicarinate, the first 

 three or five carinse bearing symmetrically disposed spines ; the corresponding 

 pleura are unicarinate, the anterior of them (second) having a single upstanding 

 spine. 



Eyes almost immovable ; an inconspicuous spinule at their inner angle. 



Three spines, two of which are large, on the inner border of the merus of 

 the external maxillipeds. 



Chelipeds markedly unequal in the male, very rarely slightly unequal in 

 the female ; in both sexes the dorsal surfaces of the arm and wrist are spiny, a 



