34 EINAR LÖNNBERG, (Schwed. Südpolar-Exp. 



anal. Ventrals shorter, in adult specimens not quite ",'3 of length of head, in smaller 

 about 3/4 of 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 ^6 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. 



Diameter of eye, and length of paired fins steadily decreases with age. 



S. 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. i8th 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. 



