20 
the ovigerous leg there is only little doubt but the specimen is a male. 
It was dredged during the first eruise of 1878 at: 
Station N®. 9. Lat. 75°16' N.; long. 45°19' E.; July 30, 1878. 
Depth of the sea 160 fathoms ; temperature of the bottom — 1°. 3C. 
Observations. This species is a nearly related to N. grossipes, Fabr. 
Yet it is easily distinguished by the form of the oculiferous tuber- 
cle, of the denticulated spines of the ovigerous leg, by the smooth- 
ness of the second tarsal joint, the great dimension of the claw of 
the leg and the smallness of the auxiliary claws. The length of 
the elaw corresponds with that observed by G. O. Sars in his 
N. macronyx; but then the latter species has an elevate and conical 
oculiferous tuberele, comparatively long palps, legs measuring only 
three times the length of the body and no auxiliary claws. 
I named the species after my friend Dr. C. P. Sluiter, the na- 
turalist of the “Willem Barents’” during the first cruise. 
Nymphon robustum, Bell, Belcher’s Last of the Arctic Voyages 
Vol. II. p. 409. 1855 Tab. XXXV Fig. 4. 
Nymphon hians, Heller, Urustaceen, Pyenogoniden und Tunica- 
ten der K. K. Oester. Ungar. Nordpol-Exped. Denkschr. d. Wie- 
ner Academie XXXV. p. 41. 1875. 
Nymphon abyssorum, Norman, Wyville Thomson, Depth of the 
Sea p. 129. 1873. 
Nymphon robustum, Bell, G.O.Sars, Prodromus Crustaceorum et 
Pyenogonidarum, Arch. for Math. og Naturvid. II. p. 265. 1877. 
Plate II. fig. 35—40. 
Of this large and beautiful species a good figure and recognizable 
description has been given by Bell; a very characteristie woodeut 
of it has been published by Sir Wyville Thomson in his Depth of 
the Sea, and again Heller published a description with figures of 
parts of the body, but the last author not knowing the description 
of Bell gives it the name of N. hians. Yet there can be no doubt 
that G. O. Sars is right, when he considers this N. hians of Heller 
as a synonym of the N. robustum, Bell. 
As none of these authors however paid special attention to the ovige- 
