36 



DISCOVERY REPORTS 



25. Ocular tubercle of medium height; fingers rather shorter than palm; tarsus somewhat 



shorter than propodus in adults, much shorter in young specimens 



A'^. brevicaudatiim, Miers 

 Ocular tubercle high ; fingers equal to or rather longer than palm ; tarsus scarcely shorter 

 than propodus in young, rather longer than the latter in adults 



A'^. biarticulatum, Hodgson 



26. Fingers longer than palm, spinules long and numbering about 20; 2 or 3 short spinose 



projections on each lateral process and each first coxa N. mendosiim, Hodgson 



Fingers shorter than palm, spinules short, numbering 9 on immovable, 14 on movable 



finger; no spinose projections on lateral processes or first coxae N. proximum, Caiman 



A. GROUP I 



Nymphon proceroides, Bouvier (Figs. 9, 10 a and 75). 



Bouvier, 1913, pp. 90-94, text-figs. 42-50. 

 Loman, 1923, p. 14 (in key). 



St. 181. 12. iii. 27. SchoUaert Channel, Palmer Archipelago, 64° 20' S, 63- 01' W, 160-335 m.; M. 

 Large otter trawl: a dozen specimens with A'^. tenuipes and Nymphon sp.? 



St. 182. 14. iii. 27. SchoUaert Channel, Palmer Archipelago, 64° 21' S, 62° 58' W, 278-500 m.; 

 M. Large otter trawl : 2 ??, 4 SS and 2 immature specimens. 



St. 186. 16. iii. 27. Fournier Bay, Anvers Island, Palmer Archipelago, 64° 25' 30" S, 63" 02' W, 

 295 m. ; M. Large dredge: 3 S3- 



St. 187. 18. iii. 27. Neumayr Channel, Palmer Archipelago, 64° 48' 30" S, 63' 31' 30" W, 259 m. ; 

 M. Large dredge: a dozen specimens. 



Description of male. Trunk of loose build, lateral processes widely separated — ^up 

 to twice their own diameter. Neck long, base of oviger in contact with first lateral 

 process. Ocular tubercle low, wide, 

 rounded ; eyes well developed. 



Proboscis short, robust, sub-cylindri- 

 cal, much shorter than cephalon. 



Abdomen reaching to middle of first 

 coxa, elevated at an angle of about 20''. 



Chelophore. Scape rather longer than 

 proboscis, length 3-5-4 times the distal 

 width. Palm very short and high; 

 fingers twice as long as palm, each 

 armed with 10-13 curved spinules as 

 represented in Fig. 9 ; setose pad extending nearly half-way along immovable finger. 



Palp. Third a little longer than, two terminal segments together longer than, second 

 segment (i-25-i-33 : i); segments 2-5 in the proportions 3-25 : 3-5 : 2-5 : 1-65. 



Oviger (type I). Terminal claw approximately two-thirds of tenth segment, armed 

 with 4-7 spinules. Total number of denticulate spines 21-24. Segments 4-6 in the 

 proportions 2-14 : 2-86 : i (? 1-5:2:1); fifth segment nearly straight, long, and of 

 almost uniform diameter throughout (Fig. 10 a). 



Fig. 9. Nymphon proceroides, Bouy'ier. Chela: x 60. 



