Bd. V: 6) 
THE FISHES OF THE SWEDISH SOUTH POLAR EXPEDITION. 
27 
a dozen rather short gill-rakers on lower part of anterior arch. Pectoral rounded, 
i*/ 3 times in length of head, but reaching beyond origin of anal. Ventral a little 
longer than pectoral, about i'/s times in length of head. Caudal rather small, 
rounded. Caudal peduncle much deeper than long, hardly more than 3 times in 
length of head. Upper lateral line about 34 scales, lower represented by a series of 
about 36 small pits. 
Total length (without caudal) of the single specimen 240 mm. 
Length of head 72 » 
Interorbital width 15 » 
Diameter of eye 1 5,5 j 
Width of head at preopercles 60 » 
Depth of body 67 » 
Depth of caudal peduncle 23 » 
Distance from snout to origin of first dorsal 75 » 
The specimen was a male with little developed genital organs. 
The general appearance of this fish reminds one of Trematomus bernacchii BOU- 
LENGER and it may perhaps most suitably be regarded as a geographic subspecies 
of the same. The fish from South Georgia appears to differ from the typical T. 
bernacchii in having a larger head (only 3V3 instead of 3 '-/a to 4 times in total length), 
a smaller eye (4V5 instead of 3 Va to 4 times in length of head), the interorbital space 
somewhat more scaly and a smaller number of fin rays as well as fewer scales in a 
longitudinal series. BOULENGER had 44 specimens of the typical T. bernacchii from 
the “Southern Cross” collections and his diagnose may accordingly be expected to 
indicate the normal limits of variation of this species. For this reason the aberra- 
tions from the typical T. bernacchii which this single specimen from South Georgia 
shows, gain importance and cannot be disregarded, but, on the contrary, recognized 
as characterizing a separate geographic subspecies. 
Trematomus bernacchii was originally found at Victoria Land in a depth from 
3 to 8 fathoms, thus at the opposite side of the globe and within the true Antarctic 
region. The great distance of South Georgia from the Antarctic lands and islands, 
and the isolation caused by this give full explanation for the differentiation of this 
subspecies, to which fact there are many analogies. 
3. Notothenia marionensis GÜNTHER (= N. angustifrons P'lSCHER). 
6 specimens from stat. 28, Boiler Harbour, Cumberland Bay, South Georgia, 
depth 12 — 15 m., sand and algæ. 24th of May 1902. 
2 specimens from stat. 36, the same locality, depth 1 — 2 m., small stones and 
sand. 13th of June 1902. 
