98 THE VOYAGE OF H.M.S. CHALLENGER. 
A species of Scalpellum, which, so far as I know, has not been observed hitherto, 
is a common commensal on the legs of Nymphon robustum, Bell. 
This species was dredged at 
Station 8 (cruise of the “ Knight Errant”). Lat. 60° 3’ N., long. 5° 517 W. August 
17, 1880. Depth of the sea, 540 fathoms. Cold area. Perhaps 1000 specimens. 
Station 2 (cruise of the “ Knight Errant”). Lat. 60° 29’ N., long., 8° 19° W. July 
28,1880. Depth of the sea, 375 fathoms. Warm area. One specimen only. 
This single specimen from the warm area must, most probably, be considered as one 
which has strayed from the cold area. As far as I know, the species has not been 
observed at a lower latitude than 60° N. 
Nymphon robustum, Bell. 
Colossendeis proboscidea, Sabine (sp.). 
Phoxichilus proboscideus, Sabine, Marine Invertebrate Animals in a Supplement to the Appendix 
of Captain Parry’s Voyage for the Discovery of a North-West Passage in the years 1819- 
1820, London, John Murray, 1824, p. ecxxvi. 
Colossendeis borealis, Jarzynsky, Premissus Catalogus Pycnogonidarum inventarum in mari glaciali 
ad oras Lapponie rossice et in mari albo, anno 1869 et 1870. Annales de la Soc. des 
Naturalistes de St Pétersbourg, vol. i., 1870. 
Colossendeis proboscidea, Sabine (sp.), G. O. Sars, Prodromus descriptionis, &c., Archiv. fiir 
Math. og Naturvid., ii. 268, 1877. 
Of this interesting species, the first of the genus Colossendeis that was observed, four 
specimens were trawled at Station 8, together with many specimens of Nymphon 
