354 Messvp. J. Wood-Mason and A. Alcock on 



A very fine male from Station 106, 1091 fathoms. 



The spine at the distal end of the outer margin of the 

 antennal scale is quite distinct, though small ; the upper sur- 

 face of the ocular peduncle is as if smeared with black 

 pigment ; and the subdorsal ridges of the telson bear near 

 their distal end two pairs of very minute spinules. 



Colour in life lurid red. 



The specimen is very soft and delicate, and its carapace is 

 hence much crumpled. 



Total length from tip of rostrum to tip of telson 89 millira. 



24. Sergestes ruhroguttatus^ sp. n. 



Serf/estes ? arctlcus, W.-M. Auii. & Mag. Nat. Hist. (6) vii. 1891, p. 190, 

 5juv. (nee Krijjer). 



(S ? . Closely allied to Sergestes arcticus, Kroyer (as 

 figured by S. I. Smith in Bull. Mus. Comp. Zool. x. p. 96, 

 pi. xvi. fig. 4, and Kep. U. S. Fish. Comm. 1884, p. 71, 

 pi. viii. fig. 2, 1886, p. 92, pi. xx. figs. 1,2), differing there- 

 from in the hepatic spine being so small as to be scarcely 

 visible and sometimes obsolescent, in its longer and slenderer 

 caudal appendages, and in the exopodites of these being 

 without a trace of a spine on the outer margin. 



Colour in life hyaline, with blood-red spots. 



Total length of a male 48 millim., of carapace from apex 

 of rostrum to middle of hinder margin 15'0 millim., of external 

 maxillipedes 32 millim,, of the first pair of legs 25"5 millim., 

 of the second pair 28'5 millim., of the third pair 31 millim., 

 of the fourth pair 19 millim., of the fifth pair 9 millim. 



The antennules of the male closely resemble those of S. 

 Frisii, Kr. (Vid. Selsk. Skr. 5 Raekke, Naturvidens. og 

 Mathem. Afd. 4 Bd. tab. i. fig. 1 c), the only difference being 

 that the hook of the prehensile fiagellum is roughened inter- 

 nally by fine, regularly parallel, ti'ansverse grooves or ridges 

 instead of granules. 



One female from Station 107, 738 fathoms ; two males 

 from Station 109, 738 fathoms ; one female from Station 110, 

 1997 fathoms ; and one male from Station 117, 1748 fathoms. 



