118 Proceedings of the Royal Physical Society. 
nearly related to the Asterolepide, and its spine-like 
processes to be the homologue of the well-known pectoral- 
paddles of the latter.” But a comparison of Newberry’s 
figures with the sketch of the ventral cuirass of Phlyctenaspis 
given above will remove all doubt as to the Coccostean 
character of the remains from the Corniferous Limestone of 
Ohio; figures 1, 2, 3, and 4 on plate lv. of Prof. Newberry’s 
work,! representing obviously the lateral spine in conjunction 
with the anterior ventro-lateral plate of a creature allied to 
the Canadian genus, though the supporting plate is remark- 
ably short from before backwards. The same view must, I 
think, be adopted for Mr Woodward’s Acanthaspis decipiens 
from Spitzbergen, so that I cannot consider the occurrence 
of a fixed spinous appendage to be as yet proved in any 
genus specially allied to the Asterolepide. Whether this 
fixed spine is in any way homologous to the articulated 
appendage of Asterolepidze, or to the pectoral limb of verte- 
brates in general, I need not at present discuss. 
Associated with other plates of Phlyctenaspis Acadica, are 
several fragments of dentigerous bones, showing small, 
smooth-pointed conical teeth in one row. . 
XII. Notes on the Devonian Fishes of Canvpbelltown and 
Scaumenac Bay in Canada. Part Il. By kh. H. Traquair, 
Esq., M.D., LL.D., F.B.S., F.G.S. 
(Read 19th April 1893.) 
FISHES FROM THE UPPER DEVONIAN OF DALHOUSIE, 
SCAUMENAC Bay. 
CTENODONTIDA. 
Scaumenacia curta (Whiteaves). 
Phaneropleuron curtum, Whiteaves, Canad. Nat., N.S., vol. x., p. 21; 
also in Trans. Roy. Soc. Canada, vol. iv., sect. iv., p. 108, fig. 2, 
and vol. vi., sect. iv., p. 91, pl. v., fig. 3; A. S. Woodward, Cat. 
Foss. Fishes Brit. Mus., pt. ii., p. 248. 
Mr Whiteaves, in his description of this species, mentions 
that “in one specimen there are indications of what looks 
| 1 Geol. Survey of Ohio, Paleontology, vol. ii. 
