AMMOTHEIDAE 



123 



Genus Nymphopsis, Haswell 



Nymphopsis denticulata, n.sp. (Figs. 69 and 70). 



St. WS 85. 25. iii. 27. 8 miles S 66° E of Lively Island, East Falkland Islands, from 52" 09' S, 

 58° 14' W to S2' 08' S, 58° 09' W, 79 m. ; S. Sh. Commercial otter trawl : i ?. 



Description. Trunk compact ; lateral processes in contact, 1-3 each with an anterior 

 and a posterior spinose process, 4 with an anterior one only (Fig. 69). Cephalic segment 

 distinctly separated off by a suture from the succeeding segments, which are all com- 

 pletely fused. Two acute antero-lateral spinose processes on cephalon; ocular tubercle 

 high, tubular, situated mid-way between these on the anterior border of cephalon. 

 Eyes large, sub-terminal. Two high, slender, spinose projections on mid-dorsal surface, 

 between cephalic suture and abdomen (Fig. 69). 



Fig. 69. Nymphopsis denticulata, n.sp. Holotype. Lateral view of body with chelophore: x 30. 



Proboscis slightly longer than trunk, ovate, tapering anteriorly to a blunt point 

 (Fig. 69). 



Abdomen, long, slender, sub-cylindrical, elevated in distal half and reaching a little 

 beyond the distal end of the second coxa; two small spinose projections on proximal 

 half (Fig. 69). 



Chelophore approximately half as long as proboscis. Scape of almost uniform 

 diameter throughout and consisting of a single segment ; a short, stout, spinose process 

 on the mid-dorsal surface, a bifurcated process at the inner, and two smaller spines at 

 the outer distal angle (Fig. 70 a, lateral aspect). Chela small and imperfect. 



Palp as represented in Fig. 70 b, nine-jointed and longer than proboscis. 



Oviger ten-jointed, with one or two denticulate spines on the four terminal segments 

 as in some species of Achelia (Fig. 70 c: cf. Fig. 59 a, c); terminal claw absent. 



Walking leg. The second walking leg, which was already detached from the specimen, 

 is represented in Fig. 70 d and e ; the spinose setae are simple, not compound and the 

 auxiliary claws are at least two-thirds as long as the main claw. Ova are present in the 

 two distal coxae and in the femur. 



Measurements {mm.) 



Length of proboscis ... 



Greatest width of proboscis ... 



Length of trunk 



Length of cephalic segment ... 



Width of anterior border of cephalon 



Width across first lateral processes ... 



Length of abdomen ... 



Length of chelophore 



1-2 



1-4 



14 



1-47 

 0-87 



0-35 

 0-25 



16-2 



