The fishes of the Danmark Expedition. 667 



(especially Mysis oculata), whilst 2 of the largest contained a reddish- 

 yellow mass {Calamis) and whitish slime, a third Mysis oculata and 

 1 large Amphipod; a female of 125 mm and another female of ca. 

 100 mm had, in addition to slime, 1 of the large, red Copepoda from 

 deep water. Lastly, the female of 310 mm had numerous Nematodes 

 ca. 30 mm long, in the stomach and a rich "collection" of yellowish- 

 brown parasitic Crustacea (Antholca (?)) in the mouth and on the 

 gills. 



This fish itself serves as food for seals (all the 4 largest were 

 taken at seal holes on the ice and some have marks of the teeth 

 of Phoca foetida), for birds (Laras eburneus) and for other, larger 

 fish (2 Gadus saida of ca. 50 and ca. 100 mm were found in the 

 stomach of a Salmo alpinus, 590 mm long, taken off the large river 

 at Hvalrosodden 7.— 8.— 07). 



With regard to the colouration of the species at different 

 ages I have coloured sketches and observations of the following 

 from life. 



The larva of 9 mm has the black pigment in the form of large 

 stellate spots partly over the abdomen, partly in the occipital region 

 and on the sides in from the later place of the two dorsal and anal 

 fins; lastly there is a little on the gill-cover. From the larvae des- 

 cribed by Schmidt^ of corresponding size this larva differs by the 

 entire absence of pigment on the side down from the later position 

 of the first dorsal fin (D^); further, the pigment D^ and A^ are 

 of equal length behind, whilst in front D^ reaches much farther 

 forward than A^. Between D- and A^ and between D^ and A^ 

 there is a mediolateral streak of well-developed pigment grains and 

 between D^ and the occipital pigment there is a distinct gap 

 (though there are a few dots of pigment between them and between 

 D2 and D^). 



At ca. 75 mm the iris is altogether silvery, the dorsum light- 

 brown, the gill-cover and belly silvery; over the whole dots of 

 brown-black pigment; outside and along the margin of the caudal 

 peduncle a red streak. 



At ca. 140 mm the dorsum is now more greenish than in the 

 foregoing; the silvery colour on the gill-cover and belly very strong, 

 Aveaker on the lower part of the tail. 



At ca. 300 mm the pupil is blue-black; the iris black in the 

 outer margin, towards the pupil changing to brown and from there 

 to golden-yellow on the inner margin. From the lower edge of the 

 maxilla to the gill-cover golden and shiny, ventral aspect of the 

 mandible gray-brown, upper part of the gill-cover blackish brown 



^ 1. с PI. I, figs. 19—23. 



