206 THE SCHIZOPODA. 



(fig. 3a) between five and sL\ times as long as broad, with the outer margin a 

 Uttle concave and the inner convex, somewhat tapering from near the base 

 to the broad, almost transverse end; the terminal joint somewhat longer than 

 broad. 



The abdominal segments furnished above and on the sides with a very large 

 number of quite minute, mostly very slender denticles. — The exopod of the 

 uropods nearly eleven times as long as broad. — Telson (figs. 3f and 3g) slightly 

 more than half as long as the exopod of the uropods, almost twice as long as 

 broad, with the outer margin somewhat concave; the terminal incision is deep, 

 one third as deep as the length of the telson, oblong-triangular, somewhat 

 rounded at the bottom and there with a couple of setae almost as long as the 

 incision, while each of its lateral margins is furnished with 13-14 very small 

 spines; slightly more than the distal half of each lateral margin of the telson 

 is spiniferous, the proximal spines widely separated from each other, the more 

 distal spines moderately close; the terminal lobes taper somewhat from the 

 base of the incision to near the end, where they are feebly widened inwards; 

 this end is broad and rounded, with four spines distinctly a little longer than 

 the more distal lateral spines. 



Remarks. — This species is easilj- distinguished by the shape and armatiu-e 

 of the telson. The presence of a very large number of tiny denticles on the 

 abdominal segments is interesting. 



II. The Order EUPHAUSIACEA. 



The collection contains representatives of eight genera. Only three genera 

 hitherto known are wanting, viz. Meganyctiphanes Holt and Tatt., Thysanoessa 

 Kroyer (with Rhoda Sim or Boreophausia G. O. S.^), and Tessarabrachion 

 H. J. H., but these are exclusively confined to the temperate and cold seas. 



BENTHEUPHAUSIA G. O. Sars (1885). 



Only a single species is known. 



1. Bentheuphausia amblyops (G. O. Sars). 



1883. Thjsanopoda (?) amhlyops G. O. Sars, Forh. Vid. Selsk. Christiania for 1883, no. 7, p. 23. 

 1885. Bentheuphausia amblyops G. O. Sars, Challenger Rept., 13, p. 109, pi. 19; text-fig. 4. 



' This topic has been dealt with in my paper on the genera and species of the order Euphausiacea 

 (Bull. Mus. Oeeap. Monaco, no. 210, 1911). 



