2 
A. SMITH WOODWARD, 
(Schwed. Siidpolar-Exp. 
A direct comparison of this type of vertebral centrum with that of Ptychodus 
in the British Museum,' shows that it is similar in every essential respect. It agrees 
in its remarkable shortness; in the delicacy and perforate character of its concentric 
laminæ; and in the comparatively small size of the pits for the cartilage at the in- 
sertion of the arches. The specimens from the English Chalk have not hitherto been 
described in detail, but figures have been published by Hasse,“ who erroneously 
ascribes these vertebrae to Selache. 
B. Teleostei. 
The Teleostean remains discovered with Ammonites in Snow Hill and Seymour 
Islands are too fragmentary for exact determination, and are not sufficiently charac- 
teristic to decide their geological age. Except one tooth and one vertebra, they are 
all isolated cycloid scales. 
The commonest scales from Snow Hill Island (loc. 2)3 are of the form shown 
in fig. I, and rarely exceed a centimetre in their longest diameter. Their anterior 
covered border is truncated while their posterior border is convex or even angulated. 
They exhibit only very fine and numerous concentric lines of 
growth, with a few gently wavy folds close to and concentric 
with the border. There are no traces of radiating grooves in 
the covered portion. A few scales probably of the same fish, 
are less truncated at the covered border, were they some- 
times exhibit one or more notches (fig. 2). There are also 
somewhat larger and deeper scales of the same type, notched in such a manner as 
to suggest that they belong to the lateral line. One of these, indeed, still bears 
part of the raised ridge produced by the traversing 
lateral line, though the specimen is too much 
abraded to exhibit more than traces of its outer 
surface (fig. 3). 
The scales just described resemble those from 
the Plänerkalk of Saxony named Cyclolepis and 
Aspidolcpis by Geinitz.'* They are probably Elo- 
pine or Clupeoid, but it is uncertain to which 
fishes they belong. In most respects they agree 
with the scales of Aulolepis from the English 
Fig. 1,2. — Cycloid scales- 
twice nat. size. 
Fir 
3, 4. — Cycloid scales, 
twice nat. size. 
' A. S. Woodward, “Catalogue of Fossil Fishes in the British Museum”, pt. I {itSg), p. 141. 
° C. Hasse, “Über einige seltene paläontologische Funde”, Palæontographica, vol. XXXI (1884), p. 9, 
pi. ii. fig. 16, 17. 
3 h'or the localities see: J. G. Andersson, On the geology of Graham Land. Bull, of the Geol. Instit. 
of Upsala. Vol. VII. PI. 6. 
H. B. Gei.nitz, “Die Fossilen Fischschuppen aus dem Plänerkalke in Strehlen”, Denkschr. Gesell, 
für Naturk., etc., Dresden zu Feier 50-jähr. Bestehens, 1868, pp. 39, 40, pl. II, figs. l — 6. 
