17 1 



There are some sharpish miliary tubercles on the dorsal and lateral surfaces 

 of the abdomen, but the edges of the pleura are perfectly smooth. The 

 abdominal terga are longitudinally cariuated in the middle line : the carina of 

 the 1st tergum is little more than a compressed tooth, that of the 6th is little 

 more than a broken line of granules, but those of the 2nd-5th are of good height 

 and have their free edge eroded and deeply notched, so as to appear bilobed in 

 a side-view. 



The antennular scale is vastly longer than the antennal, being a sharp 

 triangular lobe of such size that in repose the scales of opposite sides are in 

 contact with one another all along the inner border, which is upturned and 

 serrulate. There is a single spinelet at the outer angle of the basal joint of the 

 antennular peduncle. 



The slender antennal scale does not reach the end of the antennal peduncle. 



The 1st pair of thoracic legs is not quite as long as the body : the merus is 

 more than ordinarily dilated at its basal end, and both its borders are finely 

 spinulose distally ; the lower border of the palm is spinulose throughout, and 

 there is a spine at the far end of the upper border of the merus and palm and of 

 the lower border of the carpus : the hand is much longer than the merus, and 

 the fino-ers, which are decidedly shorter than the carpus, are about as long as the 

 palm. The 5th pair are imperfectly chelate in the male. 



The epipodites of the external maxillipeds are long, and those of the thoracic 

 legs ascend high into the branchial chamber. 



Colour in life, bright pink. 



In the largest male the length of the carapace in the middle line is (52 

 millim., of the abdomen 74 millim., of the large pair of chelipeds 1 29 millim. 



Andaman Sea, 922 fathoms; Arabian Sea 912 to 931 fathoms. 



„ t -vr 6799-6800 46 792 /r „ £ ., .. 



Regd. ISos. — jTj — : r : lo" (lypes of the species). 



102. Pentacheles Carpenteri, Alcock. 



Pentacheles Carpenteri, Alcock, Ann. Mag. Nat. Hist., March 1894, p. 235. 

 Illcstrationb of the Zoology ok the Investigator, Crustacea, Plate X. Fio. 1. 



Closely resembles P. glbbus, from which it differs in the following 

 characters : — 



The carapace is depressed, as in all other species of the genus. Its lateral 

 borders are armed with from 25 to 27 spines, namely, 4-6 + 3 in front of the 

 cervical groove and 16-20 (of which only the anterior 3 or 4 are of any size) 

 behind it. On either side of the carapace there are two enlarged spines, one 

 behind the other, between the orbital notch and the cervical groove. 



