NYMPHONIDAE 65 



The female does not differ markedly from the male. The legs, especially as regards 

 the femur, are more robust and less setose. The oviger is of the usual type with the 

 seventh normally articulated to the sixth segment. 



Remarks. The specimens in the Discovery collection agree well with the co-types 

 from Scotia Bay. 



This species undoubtedly belongs to group II and yet it has (i) a rather shorter 

 abdomen, (2) a longer second tibia, (3) more numerous spinules^ on the fingers of the 

 chela, and (4) a higher number of denticulate spines on the oviger than any of the other 

 typical species (see Table III). In all these respects it approaches N. clarenci, n.sp., and 

 A'^. brachyrhynchiim, Hoek, especially the former in which the palp is of the same type. 

 Also the atypical^ species in group II are more closely allied to A^. orcadense than to any 

 of the other typical species. 



Distribution. Previously recorded from Scotia Bay; Burdwood Bank, south of 

 Falkland Islands and South Georgia. 



Nymphon articulare, Hodgson (Figs. 23 a, 28 and 29 a, b). 



Hodgson, 1908, pp. 170-172, pi. i, figs. 4, 4 a. 

 Bouvier, 1913, p. 72 (in key). 

 Loman, 1923, p. 13 (in table). 



St. 164. 18. ii. 27. E end of Normanna Strait, South Orkneys, near Cape Hansen, Coronation 

 Island, 24-36 m. Small beam trawl: i ?, i (^ and several immature specimens. 



Description of male topotype.^ Trunk non-setose, rather compact ; lateral processes 

 separated by half of their own diameter or rather more. Neck very short, the posterior 

 two-thirds on either side occupied by the base of the oviger ; cephalic segment almost 

 as wide anteriorly as long. Ocular tubercle high and rather wide ; eyes small and set 

 near to the bifid apex. 



Proboscis a little shorter than scape and equal to cephalic segment; stout, sub- 

 cyHndrical, contracted somewhat at base. 



Abdomen pyriform, reaching to distal end of first coxa ; elevated at an angle of about 10°. 



Chelophore. Scape rather longer than chela, with a few long, fine setae along the 

 dorsal surface; length 4-5 times the 

 greatest width. Chela as represented 

 in Fig. 28, fingers rather longer than 

 palm and each armed with short, ir- 

 regular, often recurved, spinules. The t — ^ — ^ — ^^^ \ vW ' 



number of spinules varies from eigh- pjg.^S. Nymphon articulare,\\oAg^orx. Chela of co-type: 

 teen to twenty-five in the five co-types, x 47. The palm may not be quite accurate as proximal 

 and there are 2-6 more on the movable P^'^ ^^^ damaged on slide. 

 than on the immovable finger. Setose pad extending half-way along the latter. 



1 A'^. hrevicaudatum and A'^. biarticulatum have approximately the same number as .V. orcadense. 



^ Especially A^ australe, see p. 62; and also Table VI. 



^ Hodgson apparently did not examine this specimen, see p. 66. 



