76 

 Synopsis of the Indian specie* of Acantliephyra. 



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

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

 minute and hidden in a tuft of setro : 



1. The rostrum is long : it and the carapace combined aro at, least ns 



long as the abdomen without the telson : 



i. The eyes are wider than the oyestalks, and arc black w 

 dark brown : 



A. Post-antennal spino of carapace 'of good size: 



telson shorter than the exopodite of the t;iil- 

 fan : 



a. Carapace very distinctly carinntcd in 



the middle line in almost all its 

 extent : no carina runs from the 

 post-antennal spine to the end of the 

 hepatic groove : 



a. Four (or rarely more) teeth 

 on the ventral border of 

 the rostrum ... ... A. eximia. 



/8. Only three teeth on the ven- 

 tral border of the rostrum A. brachytelsonit. 



b. Carapace almost imperceptibly carinat- 



ed in rear of the gastric region : a 

 sharp buttress-like crest runs from 

 the post-antennal spine to the end 

 of the hepatic groove ... ... A. armata. 



B. Poet-antenna! spine minute : telson longer 



than the exopodite of the tail-fan ... A. sanguined. 



i. The eyes aro narrower than the eyestalks and are light 



brown in colour ... ... ... ... A.micropJUhtilnnt. 



2. The rostrum is short: it and the carapace combined are only half 



the length of the abdomen without the telson ... ... A. curtirottris. 



IL 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. 



39. Aeanthephyra eximia, S. I. Smith. 



Acanthephyra eximia, S. I. Smith, Rep. TJ. S. Fish Connn. for 1882 (1884) p. 37(i, and for 1885 (1886), pi. xiv. 

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



Acanthephyra Bdwardsii, Spcnce Bate, Challenger Crust. Macrura, p. 747, pi. cxxvi. (ig. 1, 1888. 



The 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 



