182 CRUSTACEA MALACOSTRACA. III. 



the five distal joints very slender and short Mandibles with the inner margin of the incisive plate 

 showing a few vestiges of serration. Maxillipeds five-jointed. Telson with the end truncate. 



C. truncata n. sp. 



123. Cyathura truncata n. sp. 

 (PI. XV, figs. 2 a 2 r). 



Female (without marsupimn). Slender, generally more slender than C. carinata. No eyes. 

 Antennulae with first joint of the peduncle (fig. 2 a) as long as, but much thinner than, third joint; 

 terminal joint quite small and thin. Antennae (figs. 2 a and 2 b) slightly longer than the head ; flagel- 

 lum at least as long as last joint of the peduncle, seven-jointed, with the first joint much longer and 

 thicker than the second, which is much longer and thicker than the third, while the distal joints are 

 very short and very slender. Maxillipeds five-jointed (fig. 2g); third and fourth joints combined cor- 

 responding to third joint in C. carinata. 



Seventh thoracic segment less than half as long as the sixth. First pair of thoracic legs (figs. 

 2 h and 2 i) in the main as in C. carinata; the hand has no protruding angle on the prehensile margin, 

 but is only somewhat convex and rounded before the middle; seventh joint has the prehensile margin 

 set with a row of obtuse saw-teeth, and is well marked off from the long claw. The six posterior pairs 

 of legs a little more slender than in C. carinata; second pair (fig. 2k) with the sixth joint feebly curved 

 and decreasing a little in depth from near the base to the end; seventh pair (fig. 2!) differ materially 

 from those in C. carinata in having the fifth joint much longer, only a little shorter than fourth joint, 

 while the sixth joint is considerably shorter than the two preceding joints combined, somewhat slender 

 and minutely crennlate on the lower margin. 



Telson (fig. 2 q) distinctly more than twice as long as broad, truncate with the terminal mar- 

 gin straight, and a little less than half as long as the breadth of the telson a little before its middle. 

 - Uropods (figs. 2 m and 2 p) in the main as in C. carinata, but the exopod is longer, slightly more 

 than half as long again as broad. 



Length of the largest specimen (perhaps not full-grown) 10 mm. 



Occurrence. Taken by the "Ingolf at two deep stations in the warm area. 



Davis Strait: Stat 24: Lat. 63o6' N., Long. 56oo' W., 1199 fath., temp. 2-4; 5 spec. 

 Stat. 36: Lat 6i5o' N., Long. 562i' W., 1435 fath., temp. 1-5; 2 spec. 



Anthelura Norm. & Stebb. 

 Of this fine genus a single species has been found in our area. 



124. Anthelura abyssorum Norman & Stebbing. 

 1886. Anthelura abyssorum Norman & Stebbing, op. cit p. 127; PI. XXVII, fig. 2. 



Occurrence. I have not seen any specimen. But it was taken by the "Valorous" in 1875 

 at the following place. 



South of Davis Strait: Lat. 59io' N., Long. 5O2s' W., 1750 fath. (Norm. & Stebb.) 



