22 



G. 0. Sars. This species is said to have beeii found in Kvsenangen 

 and at Tromso. In the summer 1897 I showed to professor Saes 

 a preparation of a copepod that I had been unable to identify. 

 He then declared it to be the very undinopsis bradyi, and after- 

 wards informed me in a letter that the said copepod had been 

 described and drawn by Mr. Bbady (A monograph of the copepoda 

 of the British Islands, I, p. 46, pL IV, fig. 1—11). 



The species was, however, there wrongly identified with pseudo- 

 calanus armatus, Boeck, which according to Mr. Saes is another 

 species. As Mr. Saes, in his gigantic revision of Norwegian Cru- 

 stacea, will soon come to the copepoda, I shall do nothing but 

 here note the occurrence of undinopsis bradyi at the following places : 



March I4th, 1896; Vestfjord (670 32'.5 N.; 13" 24'. 5 E.). 

 In plancton — 200 m. 



March 5th, 1897; Ostnes-fjord in Lofoten. 



March 7th, 1897; Trold-fjord in Lofoten, plancton — 65 m. 



Besides, I have this year taken several specimens of the species 

 from the fjords near Bergen. 



Euchwta norvegica, Boeck. 



Mr. Boeck took the specimens of this species on which the 

 original description was based, at a depth of 300 fathoms, off 

 Skadesnes. It has afterwards been mentioned from our waters by 

 MoBius and Saes, which investigators have given extensive descrip- 

 tions of the animal. In the North Ocean Expedition, the e. nor- 

 vegica was noticed at 12 different stations, and always from a 

 considerable depth. 



In Lofoten I have observed the species in plancton samples 

 from — 100 m., viz. 



March 23th, 1896; Eeine, 9 length 8.3 mm.. 



March 26th, 1896; Eeine, $ length 8.32 mm. 



I have further taken a female with attached spermatophores 

 in the stomach of a cod caught near Svolva3r, March 16th, 1897; 

 length 6.6 mm. Mr. Saes gives 12 mm. as the measure of the 

 largest specimens from the North Ocean Expedition, but this con- 

 siderable length is not likely to be reached by the forms existing 

 in our fjords. 



Centropages typicus, Kroyer. 



The North Ocean Expedition observed the species, besides in 

 other places, on June 28th, 1876, at st. 26 (63no' N., 50I6' E.). 

 It probably goes somewhat farther northwards, but Mr. Boeck is 

 scarcely right in saying that it occurs in great numbers along tlie 

 whole of our coast. It was found, together with some other cope- 

 pods, in a surface sample taken by capt. Thovsen in the North 

 Sea, March 8th, 1898 (57o 21' N., 2o 27' E.), Tlie surface tempera- 

 ture at the place was 7" C, saltness 35.03 %o- 



Centropages hamatus, Liljeborg, 



has not yet, to my knowledge, been observed as far north as Lo- 

 foten. The North Ocean Expedition took the species in several 

 places. Outside the Biological Station, c. hamatus has chiefly 

 appeared in the late summer and autumn, simultaneously with c. 

 typricus. Both these species were however also found in the line 

 Stavanger — Newcastle on March 8th, 1898, in the surface of the sea. 



Temora longicornis, 0. F. Miiller. 



Mr. Boeck says that the species is very common in the Kri- 

 stiania-fjord, but not quite as common on the West-coast. During 

 the North Ocean Expedition it was observed, besides in other 

 places, also at st. 124 (66041' N., 6059' E.) on Juno 17th, 1877. 

 I do not think it has as yet been taken north of tliat latitude. 

 The species in summer and autumn occurs in a large number of 

 individuals in the fjord of Bergen. In the prolongation of the 

 By-fjord on which the Biological Station is situated, temora occurred 

 in the samples of every month in 1896 — 97, with the exception of 

 March, and for the months June— October inch it was very com- 

 mon indeed. In Lofoten it was, at any rate in the winters of 

 1886 and 1887, extremely rare. 



Metridia hihernica, Brady & Eob. 



Mr. Aksel Boeck described, in Transactions of Kristiania 

 Videnskabsselskab for 1864, two species of the genus .of metridia, 

 a larger one that he called m. armata, and a smaller one, m. 

 lucens. Mr. Giesbebcht has shown that m. armata = m. longa, 

 Lubb., and as for m. lucens, the said author is of opinion that it 

 can scarcely be classed to metridia, because, according to Boeck, 

 it lacks hooks on the first joint at the inner branch of the second 

 pair of feet. It is however likely that m. lucens. a,nd m. hihernica 

 are identical; at any rate I have taken m. hihernica at several 

 places, from Bergen to Lofoten. The north limit is pro tern, about 

 the 69th degree of lat., most probably it goes considerably further 

 to the north. According to the rules of priority the name of hi- 

 hernica should, I suppose, yield to that of lucens, but as the species 

 was originally described so insufficiently, that it cannot be iden- 

 tified with certainty, it may be right to keep the term of hiherniea. 

 While m. longa is known from Greenland (Aueivillius), Spits- 

 bergen (Giesbeecht), the Kara Sea (Hansen), and has been taken 

 by myself at difl'erent places from Bergen to Tromso, — m. hiher- 

 nica has not as yet been found north of the arctic circle. The 

 fuUgrown females of m. longa have a length of 4 mm. or a little 

 more, while for the hihernica I can give the following measures : 



April 10th, 1897. Balstad in Lofoten. 

 0—200 m. 



9 2.5 mm., cf 1.75 mm. 



Nov. 24th, 1896. Puddefjord, near Bergen. 

 0—8 m. 



9 Front body 0.96 mm. | 



Hind 



1.68 



i 



2.64 mm. 



