1900.] A. Alcock — Garcinological Fauna of India. 303 



5. Carcinoplax longimanus, De Haan. 



Cancer (Curtonotus) longimanus, De Haan, Faun. Japon. Crust, p. 50, pi. vi. fig. 1. 

 Carcinoplax longimanus, Milne Edwards, Ann. Sci. Nat. Zool. (3) XVIII. 1852, 

 p. 161.: Ortmanu, Zool. Jahrb., Syst., VII. 1893-94, p. 688. 



Carapace, length a little more than two-thirds its breadth, its sur- 

 face (like that of the chelipeds) finely frosted : in the young the hepatic 

 are obscurely delimited from the branchial and gastric regions and are 

 very slightly tumescent. 



Front proper about two-ninths the greatest breadth of the carapace, 

 very faintly notched in the middle line, its free edge longitudinally 

 grooved. 



Orbits shallow, their major diameter more than two-thirds the 

 width of the front : borders of orbit finely beaded, the upper border 

 sinuous but entire. 



Antero-lateral borders of carapace not much more than half the 

 length of the postero-lateral, well arched, armed with 3 teeth or tubercles 

 (including the outer orbital angle) which become much worn away 

 in adults. 



Chelipeds subequal, massive, varying in length with increase in 

 age — from 2 or 2J times the length of the carapace in females and 

 young males to 4 times and more the length of the carapace in old 

 males, the palm being the principal joint in which the lengthening 

 takes place. There is a spine or tooth in the distal half of the upper 

 surface of the arm, and one at either angle (inner and outer) of the 

 wrist : a blunt crest, ending in a blunt tooth, traverses the inner surface 

 of the palm. 



The legs are long : the 3rd pair, which are slightly the longest, are 

 a little more than twice the length of the carapace. The last two 

 joints — as also the anterior border of the carpus — of all the legs are 

 plumose. 



In the Indian Museum are 2 specimens from the Gulf of Martaban 

 and the Andaman Sea 53 and 60 fathoms, (besides a large male from 

 Japan) . 



In spirit the colour is a light reddish ochre, the fingers unco-loured. 



6. Carcinoplax longipes (Wood-Mason). 



Nectopanope longipes, Wood-Mason, Ann. Mag. Nat. Hist., March, 1891, p. 262 : 

 Alcock and Anderson, 111. Zool. Investigator, Crust, pi. xiv. fig. 7, 



Carcinoplax longipes, Alcock, Investigator Deep-Sea Brachyura, p. 71. 



Carapace, length more than three-quarters its breadth, the regions 

 barely indicated. 

 J. II. 40 



