89 



The chela? and from one-fourth to nearly one-lialf the elongate carpus of the 

 1st pair of legs lie beyond the antennal scale. 



The other legs would seem to be very much longer, for the combined merus 

 and carpus alone of one of the last 3 pairs is nearly as long as the whole body 

 from the tip of the rostrum to the tip of the telson. 



Colour in life, bright orange-pink. 



In our largest specimen the length of the rostrum is 17 millim., of the 

 carapace 26 millim., of the abdomen 74 millim., and the length of the merus carpus 

 and two short terminal joints of one of the monodactylous legs is 118 millim. 



Gulf of Manar in 597 fathoms : Bay of Bengal, close to the Andaman shore, 

 in 561 and 669 fathoms. 



■n i at 3174 68.il 3440 



Eegd. Nos. — : — : — . 



48. Nematocarcinus cursor, A. M. Edw. 



Npmatocarcimis cursor, A. Milne Edwards, Ann. Sci. Nat., Zool., (6) XI. 1881, Art. 4, p. 14 mid Rec. Fig 

 Crust, pi. 24 : S. I. Smith, in Rep. U. S. Fish. Comm. for 1885 (1886), Alhatross Crust., p. 61, pi. xvii. figs. 1, 1«. 

 A. Agassiz, Ball. Mus. Comp. Zool. XV. 1888, p. 46. 



? Nematocarcinus undulatipes, Spence Bate, Challenger Crust. Macrara, p. 801, pi. cxxx. 



Differs from N. tenuipes in the following characters : — 



The rostrum is one-third, or even less, the length of the rest of the carapace 

 measured in the middle line, is gently ascendant, and is armed dorsally with 

 13-15 (usually 15) small close-set articulated teeth and ventrally with a single 

 spine placed immediately beneath the tip : it is continued as a distinct carina 

 almost to the after limit of the gastric region. 



At least two-thirds of the antennal scale lies beyond the tip of the rostrum. 



The third abdominal tergum has its posterior border less decidedly convex. 



The legs are similar in form and armature to those of N. tenuipes, but differ 

 (1) in being all, except the 1st pair, very much longer, and (2) in having small 

 distant spines on both borders of the last three pairs. 



The 1st pair of legs are but little longer than those of N. tenuipes, only the 

 chela? and a small part — a third or less — of the carpus lying beyond the antennal 

 scale. 



The 2nd pair are nearly as long as the distance between the tip of the 

 rostrum and the anterior border of the telson : not only the carpus and chela?, 

 but also part of the merus, lie beyond the antennal scale. 



The last three pairs are all considerably longer than the entire body, not 

 only the carpus and two terminal joints, but also about a third of the merus, 

 lying beyond the antennal scale. 



Colour in life, transparent blood red. 

 12 



