73 



Eyes of good size : a small " ocellus " is present but, lying inside the corneal 

 margin, is inconspicuous. 



Antennular peduncle short: the 1st joint is deeply concave dorsally for the 

 eye, and its scale is indicated merely by button-hole slit in its outer border : two 

 antennular flagella of good length, the outer one thickened at base. 



Antennal scale narrow, tapering, extremely acute, its outer edge strongly 

 serrated : it is supported by a strong scapulate tooth springing from the outer 

 aspect of the 2nd joint of the peduncle. 



Exopodites of the maxillipeds and of the anterior legs foliaceous, those of 

 the last 3 or 4 pairs of legs having the ordinary form. Though the terminal 

 joint of the 2nd maxillipeds articulates obliquely with the penultimate joint, yet 

 it is nearly as long as broad. 



External maxillipeds stout, pediform. Thoracic legs not elongate, the 

 longest of them being not much longer than the carapace without the rostrum : 

 the first two pairs are a little more robust than the others and end in well- 

 formed chelas. 



All the abdominal appendages are biramous and those behind the 1st pair 

 have the usual styliform appendix at the base of the endopodite. The exopodite 

 of the caudal fan is divided by a very fine transverse suture. 



Eggs large and few. 



The branchial formula is as follows : — 



Total 1 + 7 ep. 6 5 = 12+7 en. 



The epipoclite of the penultimate thoracic legs (XIII) is a hard plate which 

 does not ascend between the gill-plumes. 



38. Hoplophorus (jracilirostvis, A. M. Edw. 



Oplophorus gracilirostris, A. Milne Kdwards, Ann. Sci. Nat., Zoo!., (B) XI. 1881, Art. 4, p. 6, and Kec. Fit? 

 Crust., pi. 29. 



Hoplophorus smithii, Wood-Mason, Ann. Mag. Nat. Hist. (6) VII. 1801, p. 194. 

 Hoplophorus gracilirostris, Wood-Mason, Ann. Mag. Nat. Hist. (6) IX. 1892, p. 365. 



Rostrum slender, upcurved, as long as up to 11 times the rest of the 

 carapace, produced as a sharp carina to the posterior border of the carapace : 

 10 



