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a great depth (843 fms.). These latter are 7,5—14 mm long. The 
smallest specimen (7,5 mm) has no spines at all, a specimen of 
8 mm has one præopercular spine, then the other præopercular 
spines appear, and in the specimen of 14 mm all 5 spines are out, 
also that at the back of the head, all of which enable us with 
certainty to identify this latter specimen as a young of 5. marinus. 
Of this row of specimens the youngest, spine-lacking stage is 
furthermore, by its form, distribution of its pigmentation, etc., 
with certainty determined as identic with the specimens from the 
Tjalfe-Expedition. 
As mentioned before, p. 105, foot note 3, the material of the Ingolf- 
Expedition contains several young of Sebastes marinus in different 
Fig. 2. Young Sebastes marinus, 27 ,5 mm in length. 
Off the south coast of West Greenland (60° 05' N. 46° 35’ W.), near the surface, 
above a depth of 713 fms. 25.9.1909. “Tjalfe” St. 652. 
sizes, from 7,5 —17 mm. Unfortunately these specimens have been 
preserved in weak spirit so that the skin has become more or less 
macerated, and the pigmentation effaced; on account of this rather 
bad preservation they are not suitable for a drawing. This is the 
more lamentable as in literature, viz. in Collett (1. c. pi. I, figs. 
3—4), there only exist drawings of 2 young of Sebastes marinus, 
9,5 and 19 mm long, and they have evidently been drawn from 
specimens preserved in alcohol and are, therefore, not quite satis- 
factory. 
Next to the young of 7—9 mm the smallest of my specimens, 
preserved in formaline, is 27,5 mm in length. In this latter the 
fins are fully developed. The distribution of the pigmentation is seen 
from fig. 2. Pigment cells are especially to be found along the margin 
of the back and of the belly, posteriorly on the tail along the mid- 
line, and on the sides and the summit of the head; the dark-coloured 
peritoneum shines through the abdominal wall making it appear 
