PYCNOGONIDA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 143 



Other species taken on the voyage, but from the African coast only : 



Nymphon eapenfe. Discoarachne brevipes, Hoek. 



Palleuopsis lanata (Plate II., figs. 4, 4a). 



Specific Characters. Body well built, with lateral processes widely separated, each with 

 a prominent spur distally and dorsally ; body and appendages richly setose. 



Ocular tubercle conical, placed in front of cephalon ; with anterior eyes large, posterior 

 ones much smaller and above them. 



Oviger ten-jointed, with simple setae only ; no terminal claw, differing in the two sexes. 



Legs with long terminal claw and small auxiliaries. Spurs on the femora and first 

 tibiae distally and dorsally. 



The Body is fairly robust, with widely separated lateral processes ; these are not very 

 long, slightly dilating, with a strongly developed spur distally, as well as a fringe of 

 long setae. The segmentation is distinct ; each segment carries a fringe of long setae 

 along its posterior border. 



The Cephalon is long, cylindrical, and carries the ocular tubercle at its anterior 

 extremity. This rather peculiar structure, seen from behind, is stout, conical, and of 

 some considerable elevation ; seen laterally, it is still conical, but the front upper part of 

 the cone is incurved above the anterior pair of eyes, which are very large ; the posterior 

 pair are scarcely half the size, behind and above them. 



The Abdomen is long, almost cylindrical, being slightly dilated just beyond the 

 middle. It is directed upwards to some extent, not articulated to the trunk, and pro- 

 vided with a number of fine long setae. 



The length of the body is 10 mm., the trunk only 7 mm., and its extreme width 5 mm. 



The Proboscis is nearly as long as the scape of the chelifori, and rises ventrally 

 behind the position of the ocular tubercle. It is cylindrical and completely covered 

 with stiff setae, which are largest and most conspicuous ventrally and distally. 



The Chelifori are well developed, and rise from the anterior border of the cephalon 

 just underneath the ocular tubercle. The scape is long and two-jointed, the joints being 

 subequal in size and covered with rather short stiff setae, which are more conspicuous 

 as distal fringes. The chela has small fingers turned inwards almost at a right angle 

 to the palm ; the movable one is much the larger, and is without a setose pad at its base. 

 Neither bear teeth. The palm itself is not quite so long as a joint of the scape, and is 

 covered with shorter and stiff setae. 



The Palps are reduced to stout, rounded, setose buttons ; they rise laterally close to 

 the proboscis. 



The Ovigers are ten-jointed, and differ very considerably in the two sexes. In the 

 male, the first joint is very small, the second is very much longer and considerably 

 dilated distally ; the third is not half as long as the second, and is articulated at an 

 angle to it, and not in direct continuation ; its outer border is rounded, the inner one 



(ROT. soc. EDIN. TRANS., VOL. XLVI., 163.) 



