148 On the Pjicnogonida collected hy tlic ^Gtniss.' 



Tanristyhim styligorum. 



Ni/niphou stiiligerum, >riers, Ann. it ^rap-. Nat. Ilist. (4) xvi. (1875). 

 Ttnii/sti/lion sti/ln/crum, Miers, Phil. Trans, vol. 168 (1879). 



A number from Kerguelen Island, 



Rhynchothorax australis. 

 Hhynchothorax australis, Hodgson, ' Discovery.' 



Described by me from a single specimen taken by the 

 'Discovery' in the I\Iiudo Sound. A very large number 

 ■were taken by the 'Gauss' throughout its stay in winter- 

 quarters. These reveal the fact that the close approxi- 

 mation of the origin of the lateral processes is simply a 

 sexual matter ; in the males they are almost, if not quite, 

 %videly separated. From the number obtained it is not a 

 little surprising that none of them carry any eggs or young. 



Pycnogonum gaini. 

 Pycnogonum gaini, Bouvier, ' Pourquoi Pas.' 



Of this fine species three adult specimens occur in the 

 ' Gauss ' collection, together with a number of postlarval 

 forms. 



Its specific character is the existence of four mid-dorsal 

 tubercles, three of them the exaggerated apices of as many 

 transverse ridges and tubercles on the lateral processes. 



Winter-quarters. 



Besides the foregoing antarctic species, the two following 

 were obtained by the 'Gauss' in temperate or tropical 

 climes : — 



Tanystylum paulovensis. 



Body discoid, smooth ; proboscis very stout, tapering, and 

 nearly as long as body. 



Cheliferi reduced to two minute spinose stumps. 

 St. Paul Island ; two specimens. 



A noplodactylus vraritim us. 



Lateral processes scarcely so much as widely separated. 

 Abdomen short and directed upwards. Ocular tubercle trun- 

 cate; eyes well developed. Lo.^: femur the longest Joint, 

 the second tibia a little shorter, and the first still shorter — 

 differences small. 



Sargasso Sea ; a few s})ecimens. 



