Ichthyologiske notiser I. 73 
27) I have depicted the skeleton of the pectoral arch and fin in 
this species, the structure of which comes very near to those of 
Paraliparis bathybii. (Text-fig. 4). The pectoral of P. bathybii 
though falling in two parts, an upper, the pectoral fin proper, 
and a lower ventral-like part, has all the same the appearance of 
a single fin as the two parts are connected by a distinct mem- 
brane supported by well-developed although somewhat reduced 
rays. This reduction is farther advanced by Rhodichthys. The 
two parts of the pectoral are outwardly totally separate, the true 
pectoral fin and the long ventral filaments which have been taken 
for real ventral fins. On the skeleton a few very rudimentary 
rays are, however, found from the middle part of the fin which 
otherwise is totally reduced. (Text-figs. 7 & 8). 
The gill-slit by Rhodichthys is wider than that of P. bathybit. 
We find, however, the same reduction of the bony stay of the gill- 
cover; (text-fig. 3 (p. 23) compared with text-fig: 5); also the six 
branchiostegal rays (text-fig. 6). I think the close resemblance 
of Rhodichthys to P. bathybii in the respects above-mentioned 
indicates real affinity and have referred both forms to the fam. 
Cyclopteridae, subfam. Liparidini. They are thus derived from 
shallow-water form with a sucking-disc; the absence of this in 
these two forms is probably coordinated with their changed 
mode of life; whether their abode is"'the soft bottom of great 
depths or the intermediate water-layers, a sucking-disc would be 
of no use in either case.) 
Callionymus lyra (L). Owing to its peculiar appeararice 
this species is one of the fishes most frequently being sent to 
the museum from the coast districts and the outer fjords. It also 
enters the great fjords, specimens being known from the inner- 
most Hardangerfjord (Odda), from the Sognefjord hitherto only 
as far as Vadheim. All specimens are fullgrown, mostly males. 
1) Some years ago (1913—14) when revising the fish collections of the 
Bg. M. I arrived at the conclusion that Rhodichthys and Paraliparis were 
closely allied forms. Later I learnt, quite incidentally, that A. S. JENSEN (1905) 
had proposed the same view in a paper whose title “On fish-otoliths etc. I 
Otoliths of the Gadus-species deposited in the Polar deep.” does not give any 
clue as to its containing remarks on Paraliparis. As the detailed account, 
planned in the work from 1905, has not yet appeared I have published my 
results here. 
