7<5 



Synopsis of the Indian species of Acanthepbyra. 



I. The 6th abdominal somite is not twice as long as the 5th : the dactyli of 

 the 3rd and 4th thoracic legs are short, and those of the 5th pair are 

 minute and hidden in a tuft of sette : — 



1. The rostrum is long : it and the carapace combined are at least as 

 long as the abdomen without the telson : — 



i. The eyes are wider than the eyestalks, and are black or 

 dark brown : — 



A. Post-autennal spine of carapace 'of good size: 

 telson shorter than the exopodite of the tail- 

 fan : — 



a. Carapae.o very distinctly earinated in 

 the middle line in almost all its 

 extent : no carina runs from the 

 posi-antennal spine to the end of the 

 hepatic groove : — 



o. Four (or rarely more) teeth 

 on the ventral border of 

 the rostrum ... 



fi. Only three teeth on the ven- 

 tral border of the rostrum 



A. cximia. 

 A.brachytelsonit. 



II. 



b. Carapace almost imperceptibly catenat- 

 ed in rear of the gastric region : a 

 sharp buttress-like crest runs from 

 the post-anteunal spine to the end 

 of the hepatic groove ... ... 



B. Post-antennal spine minute : telson longer 

 than the exopodite of the tail-fan 



i. The eyes are narrower than the oyeslalks and are light 

 brown in colour 



2. The rostrum is short: it and the cai'apace combined are only half 



the length of the abdomen without the telson ... ... A. curtirostris, 



The 6th abdominal somite is more than twice as long as the 5th : the 

 dactyli of the 3rd and 4th thoracic legs are long and those of the 5th are 

 of fair length and not concealed by seta? ... ... ... A.cristata. 



A. armata. 

 A. sanguinea. 



A.riucroplithith.ii. 



39. Acanthephyra eximia, S. I. Smith. 



Acanthephyra eximia, S. I. Smith, Rep. U. S. Fish Cotnm. for 1882 (1884) ?. 376, and for 1885(1886), pi. xiv. 

 fig. 1 : Wood Mason, Ann. Mag. Nat. Hist. (6) IX. 1892, p. 361, fig. 3. 



Acanthephyra Bdwardsii, Spenee Bate, Challengi r Crust. Maerura, p. 747, pi. cixvi. fig. 1, 1S88. 



Tbe carapace and rostrum combined are at least as long as the abdomen 

 without the telson. 



Rostrum produced backwards nearly to the posterior border of the carapace 

 as a very sharp and distinct carina, which is broadly emarginate where it is 



