72 К. Stephensen. 



100 — 45 т., adult and Copepodites. Between St. 35 and St. 11, surface, 

 Gopepodites. 



This species is an excellent example of how insufficiently the Plank- 

 ton of the Greenland seas is known. Vanhøffen (1897) was the first to 

 record it as Greenlandic (from Lesser Karajak Fjord in Umanak Fjord, 

 West Greenland). Since then it has only been recorded from Greenland 

 Seas from the following places in East Greenland: 74°15' N., 18°15' W., 

 250 m. (Cleve, 1900) and 7ГЗОУ2' N., 18°12' W., 75 m. (and from a few 

 places in the neighbourhood; but the determination is not reliable) (Due 

 d'Orléans, 1909). According to the above it is the most common Copepod 

 at any rate in Northern Strømfjord. 



The material contained not only adults but also many in the Cope- 

 podite stages, chiefly in the 3rd stage. The Copepodites are very easily 

 distinguishable by their urosomes which seen from the side are rather rounded 

 in the middle (see PI. 4). Oberg has given a fairly exhaustive descrip- 

 tion of the development of this species in Wiss. Meeresuntersuch. d. 

 Deutsch. Meere, Abt. Kiel, vol. 9, 1906, pp. 40, 46, 47, 48, 49, etc., PI. 1; 

 PL 6, fig. ЗА — D; PI. 7, fig. 5A (also in his thesis for a doctor's degree, 

 which bears the title: Die Metamorphose d. Plankton-Copepoden d. 

 Kieler-Bucht, 1906; but here all the plates are omitted). A record, 

 accompanied by the more important figures is found in v. Breemen, 

 Nordisches Plankton, vol. 8, 1908, p. 231; some notes on the growth, 

 etc., are given by F. Kraefft in Ueber das Plankton in Ost- u. Nordsee 

 etc. mit bes. Berücksichtigung der Copepoden; Wiss. Meersuntersuch- 

 ungen, K. Komm., Abt. Kiel, vol. 11. As Oberg, however, does not 

 give drawings of all the limbs of any single stage, I have in the accom- 

 panying PI. 4- — 5 given figures of the entire animal and drawings of all 

 the limbs in the 3rd Copepodite stage, to which stage almost all the 

 specimens in hand appear to belong. I think it unnecessary to give 

 descriptions of the figures; for these I refer the reader to Oberg. 



X 56. Centropages hamatus Lilljeborg. 



Ichthyophorba hamata Lilljeborg, De Crust, ex ordinibus tribus 



Clad., Ostrac, Copep., 1853, p. 185, 

 PI. 21, 26, figs. 9—12. 

 Centropages hamatus Giesbrecht u. Schmeil, Tierreich, 1898, p. 56 

 (ubi lit. et syn.). 

 * — — G. О. Sars, Account, vol. 4, 1903, p. 76, PI. 52. 



Between St. 2 and the mouth of the fjord, surface. New to Green- 

 land. Previously recorded distribution: North Atlantic Ocean with 

 adjacent waters between 41° and 66° N., but chiefly the European side 

 (Sars, 1. с). 



X 57. Acartia longircmis Lilljeborg. 



Between St, 2 and the mouth of the fjord, surface; at the head of 

 the fjord, across the two bays near Itivdliarsuk, surface. 



