NYMPHONIDAE 



73 



form of, A^. brevicaudatutn. In addition to the longer tarsus already mentioned, the 

 ocular tubercle is higher, the abdomen is more narrowed posteriorly and the fingers of 

 the chela are rather longer than in A^. brevicaudatutn. 



Fig. 32. Chela of: a. Nymphon biarticulatum, Hodgson, holotype. 

 b. N. mendosum, Hodgson, c. N. bouvieri, n.sp. (."Ml :< 27.) 



The specimens from St. 167 have been provisionally referred to this species. The 

 tarsus is nearly as long as the propodus — i.e. longer than is typical for A^^. brevicaudatutn 

 — but the two terminal segments of the palp are consistently shorter than in either 

 species (see Table V). 



Distribution. The holotype was collected in the Ross Sea area; with the exception 

 of the specimens from Sts. 167 and 195 this form was collected beyond the southern 

 range for N. brevicaudatutn. 



Nymphon bouvieri, n.sp. (Figs. 2^ a, 2jb, 32 c and 33). 



St. 172. 26. ii. 27. Off Deception Island, South Shetlands, 525 m.; R. Large dredge : 4 specimens 

 2 (?(^ (length of holotype 5-3 mm.) and 2 $?. 



Description of holotype (cJ). Trunk compact (Fig. 32«); lateral processes in 

 contact proximally, each with a few long setae; 2-3 long setae on mid-dorsal surface 

 near the posterior articulation of each segment. Neck very short ; cephalic segment 

 almost as wide anteriorly as long. Ocular tubercle high and slender (4-6 times as high 

 as wide); eyes small and sub-terminal. 



Proboscis short, two-thirds of cephalic segment and of scape ; slightly expanded in 

 middle, rounded at apex. 



