REPORT ON THE PYCNOGONIDA. 
Depth in Fathoms. Name. 
417 (Sars). 
(’) 
160 (Hoek in 
MS). 
146 to 180 
(G. O. Sars). 
160 (Hoek in 
MS.). 
(2) 25 to 35 
one during the eruise of the “ Knight Errant” north 
of Scotland. 
(2) Nymphon mixtum, Ky., Nat. Tidskr. N. Ri p. 100. 
1845. N. mizxtum, Kr., Buchholz, Zweite Deutsche 
Nordpolarfahrt, Crust., p. 397, 1874. NV. mixtum, Kr., 
G. O. Sars, Prodromus (Archiy. f. Math. og Natur- 
vid., ii. 366, 1877)= NV. grossipes, O. Fabr., Wilson, 
Pyenogonida of New England, Trans. Connect. Acad., 
vol. v. p. 20, 1880. Wilson thinks the NV. mixtum, 
Kr., is undoubtedly a form of NV. grossipes, O. Fabr. I 
also believe it so nearly related to NV. grossipes, that it 
may be only a variety. Buchholz writes (Joc. cit., p. 
397) :—“ Doch muss ich es dahingestellt sein lassen, ob 
die von Kréyer angegebene auf dem Verhaltniss der 
Liinge des Tarsus zum Endglied beruhende Artunters- 
cheidung ausreichend ist, um diese Art von der vorigen 
(N. grossipes, O. Fabr.) zu trennen.” 
(2) Nymphon brevitarse, Kr., Nat. Tidskr. N. R., i, 115, 
1845. WN. hirsutum, Kr., Grénlands Amfipoder, p. 92, 
1838 (Autoritate, Kroyer)= NV. grossipes, O. Fabr., 
Wilson, Pyenogonida of New England, Trans. Connect. 
Acad., p. v. 20, 1880. In all probability Wilson is 
right when he says N. brevitarse is only a form of N. 
grossipes. 
Nymphon sluiterii, Hoek, in MS., Pyenogonids of the 
first two cruises of the W. Barents. A well-character- 
ised arctic species, with extremely small auxiliary 
claws, second joint of the palpus longer than third, 
first tarsal joint longer than second, with a claw 
at the end of the legs, which is not shorter than 
the last joint of the leg, and a truncate oculiferous 
tubercle. 
Nymphon serratum G. O, Sars, Crustacea et Pyenogonida 
nova, Arch. f. Math. og Naturvid., iv., 471, 1879. An 
extremely characteristic species, with a large spine 
dorsally on the first three segments of the trunk. 
()Nymphon brevirostris, Hodge, Mennell, Report on Dredg- 
ing off the Northumberland Coast and Doggerbank, 
British Association Report, p. 119, 1862. A very 
unsatisfactorily described species; in all probability 
the same as WV. brevitarse, Kr. = WN. grossipes 
O, Fabr. 
Geographical Distribution. 
pendix, &e., p. eexxv. 1824); 
Coast of North America, from 
the Gulf of St Lawrence, as 
far south as Long Island 
Sound (Wilson), Challenger 
Exped., Station 49, South of 
Halifax, U. S. A. 
Coast of West Norway (Kréyer), 
lat. 63° 10’ 2” W., long. 4° 
59’ 6” E. (Sars); East Coast 
of Greenland, Spitzbergen 
(Buchholz, loc cit.). 
Coast of Greenland. 
Barents Sea (Hoek in MS.). 
South of Spitzbergen, Barents 
Sea (Hoek in MS.). 
(2) Northumberland Coast, Dog- 
gerbank. 
