NYMPHONIDAE 



75 



The female shows the usual sexual differences ; the femur is more robust, the length 

 being just over twice the maximum width. 



Remarks. Although it bears a strong superficial resemblance to A'^. brevicaudatum, 

 Miers, this species can readily be distinguished by (i) the extremely short terminal 

 palpal segments, (2) the longer and exceedingly slender ocular tubercle^which is even 

 more slender in the other specimens than in the holotype, and (3) the small number of 

 spinules on the fingers of the chela. In the latter respect it approaches N. proximum. 

 Caiman (1915, p. 34, fig- 6 D), but the palm is longer and more slender, the fingers 

 more curved distally and the spinules longer; the ocular tubercle is 4-6 times as high 

 as wide instead of only as high as wide ; the setae are much longer. 



C. SPECIES OF UNCERTAIN SYSTEMATIC POSITION 

 Nymphon multidens, n.sp. (Figs. 34 and 35). 



St. 456. 18. X. 30. I mile E of Bouvet Island, 40-45 m. Large dredge: i ? (holotype). 



Description of holotype ($). Trunk rather compact ; lateral processes separated by 

 half their own diameter or rather more. Cephalic segment equal to the sum of the three 

 posterior segments ; neck rather long, base of oviger in contact 

 with first lateral process. Ocular tubercle as high as wide, 

 rounded; eyes well developed. Setae absent (Fig. 34). 



Proboscis short, sub-cylindrical, rounded at apex; much 

 shorter than cephalic segment, and two-thirds of scape. 



Abdomen short, sub-cylindrical, reaching to distal end of 

 fourth lateral process ; elevated at an angle of about 40^ 



Chelophore. Length of scape three times the distal width. 

 Chela somewhat shorter than scape and of a very unusual 

 type (Fig. 35 i), with immovable finger very short relative 

 to length of palm. There are twenty-four short, crowded 

 spinules on the movable, 26-28 on the immovable finger; 

 setose pad short but distinct. 



Palpal segments 2-5 in the proportions 4 : 3-33 : 1-5:2 



(Fig- 35 «)■ 



Oviger. Terminal claw half of tenth segment, armed with 



8-10 short spinules. Total number of denticulate spines at 

 least seventy,^ but they are so crowded that it is difficult to 

 count the numbers exactly (formula approximately 23 + 16 

 + 18 + 16 = 73); each spine is long and slender with nu- 

 merous short, crowded denticulations on each side. Seg- 

 ments 4-6 relatively short, in the proportions i -8 : 1 75 : i . 



Third leg. First coxa very short, second approximately half as long again as the sum 

 of the other two (dorsal measurements). Femur equal to first tibia, not greatly distended 



1 Hence the specific name. 



Fig. 34. Nymphon multidens, 

 n.sp. Holotype. Dorsal view 

 of body with chelophores: 

 X 16. 



