34 
EINAR LÖNNBERG, 
(Schwed. Siidpolar-Exp. 
anal. Ventrals shorter, in adult specimens not quite */ 3 of length of head, in smaller 
about 3/4 °f the same. Caudal truncate. Depth and length of caudal peduncle sub- 
equal or the former a little greater. Scales sharply ctenoid everywhere. Upper 
lateral line with a variable number of tubular scales from 36 to 51. Lower lateral 
line well developed, long, always extending so far forward that it partly is covered 
by the pectoral, with 32 to 41 tubulated scales. 
In young specimens the sides of the body are spotted, and the irregular dark 
spots may be more or less plainly arranged in longitudinal series. In adult speci- 
mens these spots are partly confluent and the pattern still less regular. Pectoral 
and caudal fins are transversally banded with darker, dorsal and, more faintly, anal 
fins are obliquely and longitudinally banded. The pigment is better developed on 
the web than on the rays and this may sometimes result in series of spots taking 
the place of the bands. 
This species of Notothenia is very easily recognized on that hump on the fore- 
head which has caused me to name it gibberifrons , and which is developed even in 
young specimens not measuring more than 5 — 6 cm. in length. Still smaller speci- 
mens may be recognized on the steep profile even if the hump is not yet developed. 
The following series of comparative measurements serve to show in some re- 
spects the direction of the ontogenetic development. 
Total length without 
caudal in mm 
36 
59 
I43 
255 
27O 
274 
Length of head 
in % of total length 
without 
caudal 
30,6 
27,« 
25.8 
29,8 
27-8 
28,! 
Diameter of eye 
» 3 > 7> > » 
» 
» 
9 > a 
9-3 
8,4 
6,2 
5,9 
6,o 
Length of snout 
» » î> Î > 
> 
» 
8,3 
9,3 
8,4 
9,0 
8,s 
8,5 
Depth of body 
J> » » > t 
3 > 
* 
— 
— 
16,1 
17,7 
19,3 
I 8,2 
> » caudal peduncle » » » » » 
» 
> 
7 
6,8 
6,3 
6,7 
7,4 
6,2 
Length of pectoral 
» » » » > 
» 
» 
27,8 
25-4 
23,« 
23,5 
22,6 
• 23,0 
» » ventral 
» 3 > » > > 
> 
> 
25,0 
22,9 
18,9 
I S ,2 
17,4 
17,5 
Interorbital width in 
% of length of head . . 
7-3 
8,1 
8,1 
s,» 
8,0 
7,8 
Diameter of 
eye, and length of paired fins steadily decreases 
with age. 
8. Notothenia macrocephala Günther subsp. marmorata Fischer.* 
6 specimens caught on hand-line among Macrocystis in a depth of 4 m., Cum- 
berland Bay, May-cove, South Georgia. 9th of May 1902. 
10 specimens caught on long-lines in a depth of 10 m., Boiler Harbour, Cum- 
berland Bay, South Georgia. 1 8th of May 1902. 
6 specimens caught on long-lines in a depth of 30 m. outside Boiler Harbour, 
South Georgia. 18th of May 1902. 
Fische aus Süd-Georgien. Jahib. wiss. Anstalten Hamburg für 1884. Hamburg 1885. 
