Devonian Fishes of Campbelltown and Scauwmenac Bay. 125 
D. Valenciennesvi, that I cannot see how it can be placed in a 
different family on characters based on those organs. 
Consequently I must for the present still consider it 
the safest thing to include Phaneropleuron, Scaumenacia, 
Dipterus, Ctenodus, and their immediate allies in one com- 
prehensive family of Ctenodontide, characterised by the 
possession of numerous dermal cranial roof-plates and a 
ctenodont dentition. 
COCcCcOSTEIDS. 
Coccosteus Canadensis, A. S. Woodward, Geol. Mag. (3), vol. ix. 
(1892), p. 483. 
One plate referable to Coccosteus, and presumably to the 
above-named species, occurs in the present collection. It is 
the posterior ventro-lateral of the left side, and is peculiar 
in being narrow posteriorly, and in having the stellate based 
tubercles with which it is ornamented much coarser than in 
the typical C. decipiens of the Scottish Old Red. 
HOLOPTYCHIIDS. 
Glyptolepis Quwebecensis, Whiteaves, Trans. Roy. Soc. Canada, vol. vi., 
sect. iv., p. 77, pl. v., fig. 4; A. S. Woodward, Cat. Foss. Fishes 
Brit. Mus., pt. i, p. 336, 
The specimen here referred to is the head and anterior 
part of the body of a large Glyptolepis, the only example of 
the genus in the present consignment of Canadian fishes. 
It measures 9 inches in length, of which 5 are occupied 
by the head. The mandible measures 4 inches in length ; 
small conical teeth are seen along the dentary margin, but 
the large laniaries are covered up. The free surface of the 
scales is ornamented with very fine, close, wavy ridges, 
sometimes irregular or contorted, but mostly longitudinal 
and tending to converge posteriorily, while they are also 
often branching and interrupted. In front of the striated 
portion there is a narrow, semicircular, or crescentic area 
of small tubercles. The scale-ornament is more delicate 
than in the Scottish G. paucidens and G. leptopterus, to 
which the fish is evidently closely allied. 
