El 
latin deseriptions of new species of ÖOrustaceans and Pyenogonids 
dredged in the North-Atlantic. The same species one specimen of 
which was collected during the first cruise of the “Willem Barents” 
was dredged at two different stations by the Norwegian expedition. 
As the latin diagnosis of Prof. G. O. Sars is a very short one and 
is not accompanied by any illustration, a full description and figures 
of the animal itself and some details are given here. 
All the species of Nymphon described before show the back quite 
smooth or furnished (N. breyicaudatum, Miers e. g.) with a grea- 
ter or smaller quantity of small spines, whereas this species is 
furnished with one large spine on the three hinder thoracical seg- 
ments, quite in the same way as is the case with species of the 
genus Ascorhynchus, G. O. Sars. In other regards the species is 
nearly related to the Nymphon megalops of G. O. Sars., which is 
perhaps more slender. 
The body of this species is not very slender, however the lateral 
processes of the thoracical segments are rather widely separated. 
The proboscis is nearly one third the length of the body and cilin- 
drical with a small mouth. The first segment is longer than the 
proboscis and furnished with a large but blunt oculiferous tubercle. 
The abdomen is small. 
The basal joint of the mandibles is as long as the proboscis, 
the second joint short and furnished with small claws, the mov- 
able one being a little longer and a bit more stongly curved than 
the immovable one. The teeth on these elaws are best seen from 
the drawing (Fig. 24). 
The palpi are very small (Fig. 25) and nearly smooth, only the 
‚last joints showing very minute hairs. The second joint is a bit 
longer than the third. The last joint is ovate. 
The ovigerous legs of the male (the only specimen dredged is a 
male) are comparatively short and stout. The egg-mass is very 
large and solid and covers partly the fourth and partly the fifth 
joint; the four last joints are short and furnished with short and 
blunt spines (Fig. 26 and 27), which seem to be broken and can 
not be called denticulate. 
HOEK, Pycnogonids b 
