16 
are not considerably swollen as is the case with the N. grossipes. 
In other regards the difference of this species with the N. gros- 
sipes seems not very large. The oculiferous tubercle is blunt, but 
this is also the case with the tuberele of the full grown male of N. 
grossipes dredged at the same locality as this specimen of N. longitarse. 
The denticulated spines of- the four last joints of the ovigerous 
legs show exactly the same form as those of N. grossipes. Only the 
claw of the ovigerous leg is somewhat different, for it is not fur- 
nished with slender hairs, but with short and blunt teeth. The 
length of the legs is also almost the same as with N. grossipes, 
being about 5 times the length of the body. The long slender neck 
is indeed characteristic of this species, but as is known, the length 
of that part of the body varies greatly with age both in this’ 
species and in N. grossipes. 
The stations where this species was dredged are: 
Station N®. 13 (second cruise: 1879). Lat. N. 71° 23’; long. 
49° 38’ E.; July 31, 1879. Depth of the sea 67 fathoms. Tempera- 
ture of the bottom — 1°C. 
Station N°. 14 (idem). Lat. 73° 10N.; long. 57°E.; August 13, 
1879. Depth of the sea 2—11 fathoms. Temperature of the bottom 
0°C. One speceimen. 
Observations. Nymphon longitarse was observed by Kröyer in the 
neighbourhood of the coast of Norway and of Greenland, by Sars in 
the northern part of the North. Sea, occurs in the Barents Sea, and 
is finally ıecorded by Wilson as found off Halifax and on St. Geor- 
ge’s Banks. The depth at which it was dredged varies from 10— 
200 fathoms. 
Nymphen serratum ,G. O0. Sars. Crustacea et Pycnogonida nova, 
Arch. for Math. og Naturvid. IV. 1879. p. 471. h 
Plate I fig. 24—28. Plate II fig. 24. 
Of this interesting species only a single specimen was dredged. 
I long considered it as a new species of the genus Nymphon. 
But while engaged in drawing up the description, Vol. IV of the 
Archiv for Math. og Naturvid. came into my hand, in which I found 
