85 



and ends in a small spine : the tooth at the end of the ventral border of the 2nd 

 joint of the antennal peduncle is very small. 



The external maxillipeds, which have broadened and compressed, but not 

 foliaceous, joints, reach slightly beyond the tip of the antennal scale. 



All the thoracic legs have the merus and ischium thin, compressed and 

 foliaceous : the 2nd pair, which have the wrist palm and fingers slightly longer 

 than those of the 1st pair, reach to the tip of the antennal scale. The three last 

 pairs of legs are of about equal length — the anterior (3rd) pair reaching about a 

 dactylus length beyond the antennal scale : in the 3rd and 4th pair the dactylus 

 is long slender and slightly curved, and the posterior border of the ischium and 

 merus is spinose : in the 5th pair the dactylus is short and a good deal hidden 

 in seta?, and the posterior border of the ischium and merus is entire. 



Colour in life, dark red. 



In the largest specimen the length of the combined carapace and rostrum is 

 28 millim., and that of the abdomen is 61 millim. 



Arabian Sea, in the neighbourhood of the Laccadives and northwards, in 

 487, 740, and 890 fathoms : Bay of Bengal, off Ceylon, in 800-637 fathoms. 



Regd. Nos. -j— (Type of the species) : — : — : ^-. 



Family Nematocarcinidce, Sp. Bate. 



Spence Bate, Challenger Crust. Macrura, pp. 481, 927 : Stebbing, Hist., Crust, p. 249. 



Rostrum well developed. Antennular scale present : two extremely long 

 antennular flagella. Antennal scale long and narrow. 



Mandible deeply cleft into strong incisor and molar processes and bearing 

 a stout 3-jointed palp. The coxa and basis of the 1st and 2nd maxilla? and of 

 the 1st maxillipeds are well developed, the coxa of the 2nd maxilla? receding. 

 The exopodite of the 1st maxillipeds ends in the usual flagellum. The terminal 

 joint of the 2nd maxillipeds lies obliquely along the distal part of the inner 

 border of the propodite and looks like a complemental piece of that joint. 

 External maxillipeds long, pediform. 



All the legs are slender and — especially the last 3 or 4 pairs — of wonderful 

 length : the first 2 pairs end in small but well formed chela?, the carpus of the 

 2nd pair being undivided. 



All the thoracic appendages, except the last pair of legs, have slender 

 exopodites. 



The Nematocarchhidx in a logical system should not be separated as a 

 distinct family, for they are merely Pandalidx in which the first four pairs of 

 thoracic legs have delicate exopodites, and they might be united with the latter 

 family. 



