PYCNOGONIDA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 



I have redescribed it on account of small defects in matters of detail in Dr HOEK'S 

 original description. 



Nymphon capense (Plate I., figs. 2, 2a). 



Specific Characters. Body stout, with lateral processes distinctly but not widely 



separated. Cephalon with enlarged base. 



Palps five-jointed. Four joints progressively decreasing in size. 

 Ovigers ten-jointed ; denticulate spines numerous, each having eight lateral teeth. 

 Legs slender ; claw large, without auxiliaries. 



This is a rather small species, with slender limbs. The body is stoutly built, with 

 the lateral processes very distinctly but not widely separated. The segmentation is 

 very distinct, and the body is perfectly smooth and transparent. 



The Cephalon is slightly longer than segments two and three together, enlarged 

 at its base, dorsal to the origin of the ovigers, and having a well-developed neck, and 

 is then widely expanded ; the cephalic lobes are divided nearly to the base by a 

 distinct groove. 



The Ocular tubercle is stout, of little elevation, rounded, and carries four well- 

 developed eyes ; it lies in front of the first pair of lateral processes. 



The Abdomen is short, not articulated to the trunk, directed upwards, scarcely 

 projecting beyond the last pair of lateral processes. 



The length of the body is very nearly 3 mm. ; its width is 1'6 mm. 



The Proboscis is about 1 - 6 mm. long, measured ventrally. It is rather bottle-shaped, 

 stout at the base ; near the middle it is enlarged ; beyond this its diameter is only very 

 slightly reduced ; the distal extremity is rounded, and the mouth fairly large. 



The Chelifori are well developed. The single-jointed scape is a little longer than the 

 proboscis, and bears a few very small setse and a small distal fringe. The chela is longer 

 than the scape, and the fingers longer than the palm and much incurved at the tip. 

 The teeth are very closely set, and of three regularly alternating sizes, the space 

 between the longest teeth being occupied by two small ones and an intermediate one 

 between them. 



The Palps are five-jointed as usual. The first is very small ; the second is the 

 longest, and devoid of setse ; the others progressively decrease in length, the proportions 

 of the four being 5'5, 5, 3'5, 2'8. The third carries a few small setse, but the fourth is 

 most conspicuously setose and has a prominent distal fringe. The setae on the terminal 

 joint are short, except distally, and not very abundant. 



The Ovigers are ten-jointed, and rise on a conspicuous body-process just in front of 

 the first pair of lateral processes, and very distinct from the dorsum. The first three 

 joints are very small, but progressively increase in size, forming a small but distinct 

 curve ; the next three form a slight curve in the opposite direction ; these three 

 progressively decrease in length, but not by much, the fourth joint of the appendage 



(ROY. soc. EDIN. TRANS., VOL. XLVI., 169.) 



