Bd. V: 6) 
THE FISHES OF THE SWEDISH SOUTH POLAR EXPEDITION. 
7 
about 7 times in length of head. Snout a little longer than diameter of eye. Upper 
lateral line with 45 — 46 tubular scales, lower lateral line only with 5 — 6 tubular 
scales, but in front of them may be counted a great number of pitted scales, on 
one side 20. First dorsal basally somewhat connected with second. Longest ray 
of former shorter than longest ray of latter which is equal to half the length of 
the head. Longest anal rays about 7.3 °f length of head. Pectoral rounded about 
2 / 3 of length of head, reaching beyond origin of anal. Ventral about V7 length of 
head, reaching beyond origin of anal. Caudal very strongly rounded. Caudal 
peduncle much deeper than long, so short that as well anal as especially second 
dorsal when laid back reach beyond the same, its depth not even contained twice 
in length of head. Anal and ventral fins as well as gill-membrane dusky. 
It is not agreeable to create a species of Notothenia on a single specimen, but 
it cannot be avoided in this case. N. brevicauda is very easily distinguished from 
other species of this genus. In its general shape it perhaps resembles most N. 
coriiceps RICHARDSON of such as I have seen myself, but differs widely from the 
same in having occipital and interorbital regions as well as opercles and cheeks 
densely scaly, a narrower interorbital region and much deeper caudal peduncle. 
Similar characteristics distinguish N. brevicauda from N. cyanobrancha Richardson 
although the latter has scales on the cheeks but not on the interorbital and occi- 
pital regions. N. karlandreæ (described below) has also some exterior resemblance 
to this fish, but has a much smaller number of scales (about 46) and rays in second 
dorsal (28 — 30) and anal (28) as well as a much more slender caudal peduncle, etc. 
N. tessellata RICHARDSON has a greater number of rays in first dorsal, smaller 
scales, narrower caudal peduncle. The slenderness of the caudal peduncle is also 
a sharply distinguishing characteristic when N. brevipes (described below), N. longi- 
pes Steindachner, and N. marionensis GÜNTHER are compared with this fish so 
that hardly any others are needed, although such exist, viz. in different numbers of 
scales and fin rays, length of ventrals, shape of caudal, etc. N. elegans GÜNTHER 
and N. nicolai BOULENGER are recognized by their naked interorbital region etc 
The remaining species of the genus differ still more so that they need not to be 
compared with this one. The following exact measurements shew the dimensions of 
the single specimen. 
Total length without caudal 120 mm. 
Greatest depth of body 25 » 
Depth of caudal peduncle ... 13 
Length of head 34 
Interorbital width 4,8 » 
Diameter of eye 8.5 ■■ 
Length of snout 10 » 
Length of ventral 25 » 
