107 
Description of young of Sebastes marinus, 7—9 mm Ion g. 
The body has a continuous vertical fin reaching from the occiput 
round the tail on to the vent and dilated like a caudal fin round 
the tip of the tail. On the underside of the tip of the tail faint 
rudiments of rays are seen, otherwise wanting in the rest of the 
fin (the horny threads of the caudal fin are not taken into con- 
sideration here). The caudal end of chorda is in a line with the 
other portion of it, or in some specimens turning a little upwards. 
Pigmented are: the crown of the head; the upper and hind 
side of the intestinal gut; the upper edge of the back, anterior to 
the embryonal caudal fin forwards, for a space as long as the distance 
between the pigmented line and the po^terior edge of the caudal fin; 
Fig. 1. Small young of Sebastes marinus, 8,7 mm in length. 
Northern Atlantic S. of Denmark Strait (58° 08’ N. 39° 10’ W.) in the surface, but 
above a very great depth (ca. 1600 fms.). 26.5.1908. “Tjalfe” St. 13. 
the lower edge of the abdomen almost opposite the pigmented 
line of the back, but scarcely so far forwards; a row of dark dots 
are, however, often faintly seen still more anteriorly, but deep 
down (if the animal is turned on its back with abdomen upwards, 
it will be seen that these foremost pigment spots are in faet placed 
in a furrow on the underside). On the nape of the neck pigment 
is faintly seen under the surface. In the oldest of the young 
the pigmented line of the back reaches relatively a little further 
forwards. 
Pectorals are found, with numerous “horn threads”, but ven- 
trals lacking. There is no trace of the numerous spines of the 
head in these small young. 
That these small fishes are the young of Sebastes marinus appears 
from a comparison with some other young, collected by the Ingolf- 
Expedition at 62° 06’ N. 22° 30’ W., in the surface, but above 
