﻿i66 



COPEPODA 



3/9 12 p. 111. 68°22 N. i7°i5 W. F. 300 I ? (V). 



i^/g 12 p. 111. Kap Dan F. 347 i c? (V). 



^4/9 10 p. 111. 6i°o6 N. i6°26 W. F. 391 i ^ (V); i ^ (IV). 



12 p. 111. F. 392 I ? (IV). 



Distribution. Eucha-fc norvrgica is recorded from the Atlantic at least as far south as 51° L. N. 

 from the west coast of Greenland at little Karajak-Fjord (Van h of fen), and north of Iceland (Paul- 

 sen). It has been found abundantly in the Fseroe channels, and in the Norwegian Sea, but only in the 

 northern part of the North Sea. It is, according to Sars, frequent in deeper layers along the whole 

 coast of Norway, and so it is in the Skager Rak. It is recorded as common in the Barents Sea. The most 

 common species of EiuhcBtc found in the Polar basin crossed by Nans en was E. glacialis, not nor- 

 ■vegica as originally proposed by Sars, but the latter species was nevertheless (Sars 1903 p. 39) found 

 occasionally in two different places. As Mrazek says that his specimens attain a length of about 

 10 mm., he has probably confounded the two species. 



Euchccte norvegica has been taken by the Due d'Orleans (from Tj-j — '/s 1905) at most stations 

 between c. 10° L,ong. East and the east coast of Greenland as far north as 80° Lat North, but was never 

 common. The species was never common between c. 300 — 100 meters, where adult females with ovi- 

 sacs or spermatophores and males (sometimes with sjjermatophores attached to pes V) were often found; 

 between o — icx) met. mature sjiecimens were never found, but now and then a few young ones (1907 

 p. 407). Wolf end en has found the same to be the case in the Atlantic and writes (p. 133) "Young 

 and undeveloped specimens are not uncommon near the surface, but the adult animal appears to prefer 

 the deep water down to 500—600 fathoms". My material, as far as it goes, tells the same story. 



Though the species has a wide distribution in the northern seas, and though it is occasionally 

 found propagating here, I think we are right in regarding it as a species which belongs to the North 

 Atlantic, and hy the Atlantic currents are carried to the polar regions; it seems in any case to be 

 distinctly more common in tlie Fjeroe channels and the west of Iceland than in the ocean between 

 Norway, Greenland and Spitsbergen. 



47. Euchaete tonsa Giesbrecht 

 (PI. VI figs 4 a— b; text-figs 46 a— g). 



1895. Euchaete tonsa 11. sp. Giesbrecht, p. 251, pi. IV figs 9 — 10. I 1906 Euchx-te tonsa Giesbr. listerly, p. 64, pis 9— 10. 



— — — V. Bremen, p. 55, fig. 62. 



— — — Farran, p. 40. 



— — — A. Scott, p. 72, pi. XIV figs 8— 15. 



— — — Wolfenden, p. 298, text- figs 5oa-d. 



Description. % Size of specimen from St. 72 Thor 1905 was 6-4 mm.; head -)- first thoracic 

 tergite 2'8, four posterior thoracic somites i-8; urosome i-8 mm. 



The lateral corner is like Wolfenden's figure, and more pointed than figured by vScott and 

 Esterly for Pacific species; the point is, as shown in text-figs 46a — b, more prominent on the left than 

 on the right side; no lateral tuft of hairs is found. 



