PYCNOGONIDAE 



125 



Distribution. This is the first record of the genus from the western side of the 

 sub-Antarctic Zone. 



Family PYCNOGONIDAE 

 Genus Pycnogonum, Briinnich 

 Pycnogonum rhinoceros, Loman (Fig. 71c). 

 Loman, 1923, p. 7, fig. A, 1-5. 



St. 45. 6. iv. 26. 27 miles S 85^ E of Jason Light, South Georgia, 238-270 m.; gy. M. Large 

 otter trawl : i S- 



Remarks. A single, large male undoubtedly belongs to this species. The type 

 specimens were not quite adult and the oviger (Loman, 1923, fig. A, 3, p. 8) possessed 



Fig. 71. Pycnogonum platylophiim , Loman: a. Third leg of male. b. Same of female. 



(Both: 20.) 

 P. rhinoceros, Loman : c. Oviger of male. 



only seven segments. In the Discovery specimen the oviger is nine-jointed, with a short 

 terminal claw (Fig. 71 c). Loman states that there is "no trace of eyes"; in the 

 Discovery specimen, however, eyes are present and the anterior is larger than the 

 posterior pair. 



Measurements {mm.) 



Length of proboscis ... 



Greatest width of proboscis . 



Length of trunk 



Length of cephalic segment 



Width of cephalon 



Width across second lateral processes 



Length of abdomen ... 



Distribution. South Georgia. 



