78 



Eyestalks little longer than the reniform corneae are wide, hardly reaching beyond the 

 middle of basal antennular article. Antennular peduncle hardly extending beyond the middle of 

 the scaphocerite, y^ article slightly longer than 2°'^; the upper flagella are lost, the lower 

 measure 185 mm., i. e. lYs-times as long as the body. Stylocerite little longer than the eyestalks. 



Antennal scale measuring two-thirds the length of the carapace, a little more than 4-times 

 as long as wide, but slightly narrowed apically; the outer margin appears distinctly concave 

 on the posterior third, slightly conve.\ on the anterior and ends in a small spine, that is just 

 surpassed by the truncate lamellar portion. Flagella 315 mm. long, just 3-times as long as the body. 



External maxillipeds as long as in the variety tenuipes (A. Alcock, Descript, Catal. Indian 

 Deep-Sea Crust. 1901, p. 88); last joint narrow, lanceolate, measuring two-thirds the length of 

 the penultimate, terminal spine small, movable, 0,58 mm. long, one-tenth the length of the joint. 



The legs of the i*' pair reach by the chelae and tip of carpus beyond the antennal 

 scale, ischium with 4 spines, merus with one or 2, carpus 15 mm. long, almost 4-times as long 

 as the chela (4 mm.), fingers 1,6 mm. long, a little more than one-third the entire length of 

 the chela and clothed with long setae besides a tuft of short setae at the tips. 



Peraeopods of the 2°*^ pair as long as the abdomen, reaching by their chelae and carpus 

 beyond the antennal scales; ischium with a spine near the distal end, merus with 4 equidistant 

 spines, the foremost of which is implanted a little beyond the middle. Carpus (25,5 mm.) longer 

 and slenderer than that of i"*' pair, proportion of their lengths like 3:5, chela (4,25 mm.) 

 one-sixth the length of the carpus, as long as that of i*' pair but more slender, fingers one- 

 third of the entire length, furnished with setae like in the first pair. 



Legs of the 3'^'^' pair 85 mm. long; ischium with a spine near the distal extremity, merus 

 with 6 spines along its whole length, carpus unarmed, 31 mm. long, one-fifth longer than that 

 of the 2"'' pair and twice as long as the carpus of the 1"' pair. Propodus very short, ^n o' ^^^^ 

 carpus, dactylus as long as propodus. Legs of the 4"^ pair resembling those of the 3"', legs of 

 the 5''^ pair wanting. 



The rostrum is 14 mm. long, the carapace, measured in the middle line, 24,5 mm., the 

 abdomen 68,5 mm., entire length 107 mm. 



The variety tetmipes Bate, which was considered by Col. Alcock as a different species, 

 does perhaps not differ from the variety producta, described above, but there is a tooth on the 

 lower border of the rostrum, that is also slightly longer, the 1^' pair of legs have smooth joints 

 and the form of the antennal scale is perhaps different. A^aiiaf. ensifer (S. L Smith) var. exi/is 

 (Bate) from the eastern Atlantic seems to differ, according to Mr. St.\nlev Kemp's description 

 in "Fisheries, Ireland, Sci. Invest., 1908, I. [1910], p. 75, PI. IX, figs, i — 10" by the cervical 

 groove that is well marked dorsally, by the telson which is sulcate above, by the different form 

 of the outer margin of the scaphocerite, by the chelae of the i^' and the 2'"' pair of peraeopods 

 being slightly longer with regard to the carpus and probably by some other slight differences. 



The typical species, finally, Nemat. ensifer (S. I. Smith) from the western Atlantic seems 

 also to present some slight differences from the variety producta. As has already been observed, 

 the cervical suture runs as a distinct sulcus from the dorsum of the carapace to the upper part 

 of the hepatic region, the truncated tip of the antennal scale does not extend beyond the strong 



