52 
EINAR LÖNNBERG 
(Sch wed. Südpolar-Exp. 
theniidce is best represented. Although only two species ( Notothenia larseni and 
Artedidrace skottsbergi ) with full certainty have been stated, it seems probable 
thaf some other small species likewise occur, and in addition to them, at least one 
species of a large “ Notothenia ”, or perhaps more probable Trematomus , and a 
“ Chœnichthys" . If this latter has not been Ch. rliinoceratus, against which the great 
depth at stations 81 and 90 speaks, it might have been a Gerlachea DOLLO which 
genus was discovered by the “Belgica ”-Expedition at a locality not so very distant, 
or some of the other specialised and “pickerel-shaped” Nototheniidæ. But this fa- 
mily is not the only one represented in this region. There was also found a Ma- 
crurus and a rather large member of Lycodidœ , which latter, most probably, is yet 
undescribed. Such a conclusion is at least near at hand, if the comparison is ex- 
tended to the species of the genus Lycodes of the Northern Atlantic and Arctic 
Ocean, 1 which appear to have a rather limited distribution. 
The propagation of the Nototheniidæ. 
Although the following notes are very incomplete they are of interest as they 
give some information about an almost unknown chapter of the life-history of the 
subantarctic and antarctic shore-fishes. 
A female of Notothenia brevipes with a total length of about 12 cm. and caught 
in Berkeley Sound the 10th of Aug. 1902 in a depth of 25 m. had greatly extended 
ovaries which seemed almost ripe. The time of propagation of this species could 
therefore not be very remote. The diameter of the eggs was about 1 mm. 2 A 
month earlier females of the same species caught at Port Williams the 4th of July 
had immature ova with a diameter of l / 2 — 3 / 4 mm. This species appears therefore to 
spawn in the later part of the winter, or early in the beginning of the antarctic spring. 
A female of Notothenia mizops nudifrons caught at Shag Rocks, W. of South 
Georgia in a depth of 160 m. the 19th of April 1902 was so greatly distended by the 
ovaries that the spawning season must have been very near. Its eggs measured about 
i 2 / 3 mm. in diameter. The spawning of this species thus probably takes place in the 
antarctic autumn, which is corroborated by the fact that the specimens of the same 
kind which were caught at South Georgia a few weeks later had not distended ovaries. 
Notothenia larseni has probably a similar spawning time as N. mizops , because 
a female specimen of the former caught at Shag Rocks together with the just men- 
tioned female N. mizops had also distended ovaries, and its eggs measured about 
I mm. in diameter. 
1 Conf. the work by Ad. Jensen on the Genus Lycodes: “De Nordevropæisk-Grônlandske Lycodinœ" . 
Den Danske Ingolf-Expedition. Bd. 2 No. 4. Kjöbenhavn 1904. 
3 These and the following measurements refer to ovarian eggs in preserved state. 
