NYMPHONIDAE 



43 



In the Discovery collection there is one ovigerous male, measuring 6-8 mm. in length, 

 that agrees very closely with the type of A^. gracillinmm. There are only thirty-four 

 denticulate spines on the oviger; the two terminal palpal segments together are four- 

 fifths of the second segment (Table IV, St. 149, S^); the second coxa is 2-2 times the 

 sum of the other two coxal segments. The femoral gland tubercles, however, are not 

 quite so prominent as in the type; the tarsus is one-fourth as long again as the 

 propodus. The number of spinules on each finger of the chela is twenty-seven and 

 thirty-three respectively. 



Measurements (mm.) 



Length of proboscis ... 



Diameter of proboscis 



Length of trunk 



Length of cephalic segment ... 



Width of anterior cephaHc lobes 



Width of neck 



Width across second lateral processes 



Length of abdomen ... 



I'O 



4-0 

 0-8 

 8-0 



1 0-0 



H-5 



2-0 



1-6 



0-8 



0-2 



Distribution. Previously recorded from McMurdo Sound. 



Nymphon subtile, Loman (Figs. 14, 15 and 24 b). 

 Loman, 1923, pp. 14 and 19, fig. C. 



St. 51. 4. V. 26. Off Eddystone Rock, East Falkland Island, from 7 miles N 50° E to 7-6 miles 

 N 63° E of Eddystone Rock, 105-115 m.; f. S. Large otter trawl: i ? from kelp root. 



St. WS 229. I. vii. 28. 50° 35' S, 57° 20' W, 210-271 m.; f. gn. S. Commercial otter trawl: 

 2 ovigerous (JcJ, 2 young, with Pallene australis, n.sp. 



St. WS 237. 7. vii. 28. 46° 00' S, 60° 05' W, 150-256 m.; c. br. S. Sh. Conmiercial otter trawl: 

 I 9, I ovigerous $. 



St. WS245. 18. vii. 28. 52°36' 8,63° 40' W, 304-290 m.;d.gn.S. Sh. Commercial otter trawl : 

 I ?, I incomplete specimen. 



Description of male. Trunk loosely built, lateral processes separated by wide 

 intervals (one and a half to two and a half times their own diameter). Cephalic segment 

 approximately equal to the sum of the three posterior segments ; neck long ; oviger base 

 small and in contact with first lateral process. Ocular tubercle wide, low and rounded; 

 eyes conspicuous. Setae absent (Fig. 15 a). 



Proboscis short, sub-cylindrical; nearly equal to, though apparently much shorter 

 than, scape (from dorsal aspect); foreshortened in Fig, 15 a. 



Abdotnen short, reaching to distal end of fourth lateral process or a little beyond ; 

 elevated at an angle of about 35°. 



Chelophore. Scape shorter than chela, length four and a half times the distal width. 

 Fingers rather longer than palm each armed with eighteen and twenty-two spinules 



respectively (Fig. 14 b). 



6-2 



