90 



In an egg-laden female the length of the rostrum is 6 millim., of the 

 carapace 18 millim., of the abdomen 51 millim., of the longest leg 84 millim. 



Arabian Sea in 609-620 and 675 fathoms, Gulf of Manar in 406 fathoms, 

 Bay of Bengal in 240, 270 and 272 fathoms. 



-n , ^-j- 6265-6268 _ 6273-6276 _ 6278-62S1 _ 6841-6S47 _ 8664-8666 _ 2S2 _ H65 . 



Kegel. iNos. q : 9 : 9 : 9 9 : io : io : 



1741-1743 _ 3891 

 XO ' 10 * 



Nematocarcinus cursor var. paucidentatus, Spence Bate. 



Xematocarcinns paucidentatus, Spence Bate, Challenger Crust. Macrura, p. 816, pi. cxxxii. fig. 9. 



Only differs from JV. cursor in having but 7 to 9 (usually 9) teeth on the 

 dorsal border of the rostrum. 



Colour in life transparent blood-red, or pink : eggs light blue. 



In an egg-laden female the length of the rostrum is 6 millim., of the 

 carapace 20 millim., of the abdomen 54 millim., of the longest leg 95 millim. 



Andaman Sea, in 188-220, 265, 271, 405 and 500 fathoms : Bay of Bengal, 

 near the Andaman shore, in 561 fathoms, and off Ceylon (west coast) 597 fathoms. 



^, , tvt 8516 8578 3118-3120 3168 6848-6S50 144S-1452 



Regd. Nos. — : — : — — : — : — 5 — : — ^— • 



49. NematOCavCUlUS gracilis, Spence Bate. 



Nematocarcinus gracilis, Spence Bate, Challenger Crust. JIacrura, p. 815, pl.czzxii. fig. 8. 



Differs from N. tenuvpes in the following characters: — 



The rostrum is about a third the length of the rest of the carapace measured 

 in the middle line : it is horizontal, often with a slight distal declivity, and is 

 armed dorsally with from 16 to 22 (usually 20) small close-set articulated teeth, 

 and ventrally with a single tooth placed immediately beneath the obliquely- 

 truncate tip : it is continued nearly to the after limit of the gastric region as a 

 distinct carina. 



The posterior border of the 3rd abdominal tergum is not so strongly convex. 



More than two-thirds of the antennal scale lies in advance of the tip of the 

 rostrum. 



The legs only differ in being all (including those of the 1st pair) very much 

 longer, and in having some small and distant spines on both borders of the very 

 elongate merus of the last three pairs. 



The 1st pair of legs are as long as the distance between the tip of the 

 rostrum and the anterior border of the 3rd abdominal tergum : not only their 

 chelae, but more than two-thirds of their elongate carpus lie beyond the antennal 

 scale. 



