126 



DISCOVERY REPORTS 



Pycnogonum platylophum, Loman (Fig. 71 «, b). 

 Loman, 1923 o, p. 10, fig. E, 1-5. 



St. WS 88. 6. iv. 27. 54= 00' S, 64'' 57' 30" W, 118 m.; S. Sh. St. Commercial otter 

 trawl: i ^. 



St. WS 93. 9. iv. 27. 7 miles S 80° W of Beaver Island, West Falkland Islands, from 51° 51' S. 

 61° 30' W to 51° 54' S, 61° 30' W, 133-130 m.; gy. S. Commercial otter trawl: i ?. 



Measurements {mm.) 



Length of proboscis ... 



Basal width of proboscis 



Length of trunk 



Length of cephalic segment ... 



Width of cephalon (anterior border) 



Width across second lateral processes 



Length of abdomen ... 



Remarks. These specimens differ from the holotype described by Loman (1923 a, 

 p. 10, fig. E) in one minor point — namely, in having the lateral processes in contact 

 instead of separated by narrow intervals. Fig. yi a and b represents the third right leg 

 of the male and of the female respectively. The female is rather soft and of a light 

 brov^nish-yellow colour; the male is much darker brown in colour, with more slender 

 walking legs. The genital pores are present in each specimen. 



Distribution. Sub-Antarctic, from the Magellan district. 



Pycnogonum magellanicum, ? Hoek (Fig. 72). 



P. magellanicum, Hoek, 1898, p. 296, pi. iii, figs. 20 and 21. 



? P. magnirostre, Mobius, 1902, p. 194, pi. xxx [vii], figs. 12-14. 



St. WS 228. 30. vi. 28. 50° 50' S, 56° 58' W, 229-236 m. Commercial otter trawl: 1,^,1$. 



St. 399. 18. v. 30. I mile SE of SW point 

 of Gough Island, 141-102 m. Large dredge: 

 I $, I ovigerous (J. 



Description of male (WS228). Trunk 

 compact, three distinct transverse body 

 ridges present, each with a median, round, 

 blunt tubercle ; a similar tubercle on each 

 lateral process. Lateral processes 2-4 each 

 in contact with the preceding body ridge. 

 Cephalic segment equal to the sum of 

 the two succeeding segments; ocular 

 tubercle situated on a broad slightly 

 raised ring near the anterior border of 

 cephalon and not quite as high as wide ; 

 eyes large. Width across first a little 

 greater than that across second lateral 

 processes. 



Fig. 72. Pycnogonum magellanicum} ,\loek: a. Third leg 

 of male. Zi. Same of female — St.WS228. (Both: x 20.) 



