87 | Sigurd Johnsen. 
by the species. Evidently the conditions of life in these latitudes 
are not unfavourable to the growth of the individuals, but as to 
propagation nothing can be said. The large size may indicate 
that the individuals attain maturity later here (when three years 
old) than in the Atlantic proper (when two years old), or that 
they do not become mature at all, thus living longer here than 
in regions where spawning takes place which action seems to ve 
followed by death. 
It would be of interest to investigate the specimens of the 
north with regard to racial differences from the typical M. glaciale 
of the Atlantic. The present material is however, not well-fitted 
for an investigation, being small in number and for a great part 
in a condition which renders the examination of the photophores 
difficult. It is generally only the maculæ anales which vary in 
number (AO ant + AO post). I have met with the following 
combinations in the material from Norwegian waters: 5 + 7, 
5+ 8,6+ 6,6-+ 7,6-+ 8, 7 + 5,7 + 6  Symmemnein; 
on both sides of the body: 6 -+ 7 in seven specimens, 6 + 8 
in two, 6 + 6 and 5 + 7 in one specimen. Unsymmetrically 
the following: (5 + 7, 6 + 7) in two specimens, (5 -+ 8, 5 + 7), 
(6+ 7, 7+ 6), (+ 8, 6+ 7) and I + 6, 7 + 5) each 
in one specimen. Thus AO vary in number from 12 to 14, with 
13 as the most frequent number and 6 — 7 as the most frequent 
combination. The northern specimens are in accordance with 
the Atlantic ones as shown by the material of the “Armauer 
Hansen” from abt. 57° N. I have examined 110 young speci- 
mens of the group 0 (1918, p. 667); of these 99 specimens 
had the photophores arranged exactly in the same way on both 
sides, showing the following variation. 
AO AO Number 
ant. + post. of specimens 
12 | 5+ 7 | 6 
12 6+ 6 5 
13 6+ 7 Til 
13 7+ 6 | A 
14 6+ 8 1 
14 7+ 7 6 
