414 DR. J. G. DE MAN ON CRUSTACEA CHIEFLY 



penultimate than from the posterior border, whereas in the female the contrary is the 

 case. 



The internal antennae agree with those of the female, and tlie distal border of the 

 first joint of the peduncle carries a, sharp spine near the outer angle, which has the same 

 size as the spine with which the second joint is armed, and the thickened portion of 

 the outer flagellum reaches to the end of the antennal scales. The antennal scales 

 (PI. 31. fig. 34) are more elongate than those of the female ; they are 6 mm. long, nearly 

 one-sixth the Avhole length and a little more than three times as long as broad ; the 

 flagellum is as long as the body. 



The most prominent difference from the female is exhibited by the external maxilli- 

 peds, which are much longer. These appendages, 25-5 mm. long, are twice as long as the 

 carapace, rostrum included, and their last two joints extend beyond the antennal scales ; 

 the terminal joint, just as long as the other joints together, viz. 12'75 mm., is vnuch 

 slenderer than in the female and terminates in one single, brown-coloured, sharp 

 point. 



The legs of the first pair resemble those of the female, but they are much larger, half 

 their chelae extending beyond the antennal scales. The lower margin of the merus 

 carries proximally eight small spines, similar to those of the female. 



The legs of the second pair extend one-third of their carj)us beyond the antennal 

 scales. The merus is not articulate, the carpus is 7-articulate ; the third joint is nearly 

 as long as the first and the second taken together, and longer than the others ; the sixth 

 is the shortest, the fourth little longer than the fifth ; the first, the second, the fifth, 

 and the seventh are nearly the same length. The chela is a little shorter than the 

 last three joints taken together, and the fingers are somewhat shorter than the palm. 



The other legs agree with those of the female : the third extend a little beyond the 

 scales ; the merus of the third pair carries only three movable spinules on the distal 

 half of its outer surface, that of the fourth only two, that of the fifth only one, near tho 

 carpal articulation. 



The difference in colour is quite remarkable, for, when caught, the male is scarlet. 



Geographical Distribution. — Hakodadi, in deep water [Stimpsou). 



Spirontocaris propugnatrix, de Man. (PI. 32. figs. 35-41.) 



Spirontocaris propugnatrix, de Man, iu Ann. & Mag. Nat. Hist. ser. 7, vol. xvii. 1906, p. 404. 



One specimen from the Inland Sea of Japan, cavight at a depth of fathoms ; bottom 

 sand, weeds, here and there stones. It was captured together with the specimens of 

 Spirontocaris panclaloides, Stimpson. 



Apparently a new species, distinguished by the elongate rostrum and its characteristic 

 toothing. Measured from the tip of the rostrum to the end of the telson, this specimen, 

 which has a slender shape, appears to be33'2 mm. long; the carapace, rostrum included, 

 is 15-2 mm. long, little shorter than the abdomen ; without the rostrum, the carapace 

 measures one-seventh the whole length. The rostrum, which is a little more than twice 

 (namely 2^ times) as long as the remainder of the carapace, arises at one-third the 



