36 



Length of abdomen 

 Width of trunk .... 

 Length of third leg . 

 Proportions of femur and two tibiae 



Tarsus and propodus together 



In all cases the tarsus is longer than the propodus. 



The Palps are alike in all cases, but these have not been accurately measured, as 

 this cannot be done without removal. 



Fig. 4a is that of a Winter Quarters specimen. 



The Ovigers are essentially alike, the differences between one or two of the joints 

 being very trivial (fig. 4b). The number of denticulate spines is too irregular to be of 

 any value. 



9 9:7:5:7. ? 11 : 7 : 5 : 8. <? 11 : 9 : 7 : 9. 



The character of these spines is shown in Plate X., fig. 15. 



The sexual difference in these organs is the same in all, and the ova, which are 

 known in all but the Barrier specimens, are large and attached to the oviger in precisely 

 the same way. 



PENTANYMPHON. 



Body smooth, very slender, with lateral processes widely separated. Five pairs 

 of legs. Chelifori well developed, chelate ; scape a single joint. Palps five-jointed. 



Ovigers ten-jointed, terminating in a pectinate claw, the last four joints with 

 a single row of denticulate spines. 



But for the additional pair of legs it would be quite impossible to separate 

 this genus from Nymphon. Only a single species is for the present recognised, 

 and this appears to have a circumpolar distribution. It has been taken by the 

 Scotch, German, and French Expeditions. 



Pentanymphon antarctictjm. 

 (Plate V.) 



Pmtanymphon antarcticum, Hodgson (11), p. 458 ; Cole (7), p. 405 ; Bouvier (3), p. 294. 

 Specific characters : — 



Body very slender, lateral processes long and widely separated, neck very long. 

 Chelifori : chelaB long and slender, shorter than scape, with short, stout, uniform, close-set teeth. 

 Palps : terminal joint longer than preceding, which is in turn half the length of the third. 

 Ovigers : terminal claw pectinate, denticulate spines, with seven pairs of lateral teeth, the first 

 being very small. 



Legs rather long and slender, with a well-developed terminal claw and two auxiliaries ; setje 

 arranged in four rows on the last three joints. 



