Bd. III: 4) ON FOSSIL FISH-REMAINS FROM SNOW HILL AND SEYMOUR ISLANDS. 3 
Chalk,'* and there is no reason why they should not represent this or an allied fish. 
It is interesting to add that the only vertebral centrum from Snow Hill Island (loc. 2) 
is pierced by a foramen for a continuous strand of notochord, such as occurs in many 
primitive Isospondylous fishes. 
One scale from Snow Hill Island (loc. 2) agrees in shape with the common 
specimens, but differs in having the posterior exposed sector ornamented with a few 
feeble radiating ridges (fig. 4). Another fragmentary scale from the same island 
(loc. 6) exhibits so sharp a wavyness in the lines of growth, that it appears to have 
been originally marked with radiating grooves on its covered portion. There is also 
an oval small scale, in which the concentric lines of growth form a comparatively 
coarse ornamentation. 
The single detached tooth from Snow Hill Island (loc. 2) is a hollow, laterally 
compressed, smooth cone, about 7 millims. in height and slightly recurved at the 
point. It may belong to one of the Enchodontidæ, but this is uncertain. 
The only well-preserved scale from Seymour Island (loc. 9) is comparatively 
small and longer than deep, but agrees with the common scales from Snow Hill 
Island in the very fine concentric lines of growth and the wavy markings concentric 
with its margin. 
IÎ. Tertiary. 
The only fish-remains obtained from the Tertiary of Seymour Island are six 
Teleostean vertebral centra from a coarse sandstone at locality ii. One of these 
specimens is much rolled and waterworn, but the others, though broken, have sharp 
edges and ridges. They represent a comparatively large fish with short anterior 
abdominal vertebrae, and they very closely resemble the corresponding vertebræ of a 
large e.xisting species of Notothenia (perhaps N. culbecki) which was obtained by the 
“Discovery” Expedition and shown to me by Mr. G. A. BOULENGER. The resemblance 
is, indeed, so striking that these fragmentary fossils may be ascribed without hesita- 
tion to Nothotlienia or an allied genus, thus proving that this very characteristic 
Antarctic type of fish was already established in the southern seas in early Tertiary 
times. One abdominal vertebra, which is evidently the foremost, is shown of the 
nat. size from four aspects in fig. 5, a — c. The centrum is wider than deep and 
its anterior articular face (fig. 5) is much less deeply concave than its posterior face 
(fig. 5 a). It is very short, and the secondary bony tissue between the primitive 
double-cone is of a coarsely spongy te.xture (fig. 5 c). A very short and stout 
transverse process (fig. 5, tr.) occurs above and partly in front of a deep pit for 
* A. S. Woodward, “Fossil Fishes of the English Chnlk’' (Mon. Palæont. Soc., 1903), p. 85, pi. XIX, 
figs. 3, 4. 
