124 Proceedings of the Royal Physical Society. 
Here again specific identification is a matter of conjecture, 
as there are no marks by which it can be positively identified 
with the small fish described by Whiteaves as G. Quebecensis, 
seeing that it shows neither fins nor configuration of the 
body, on which characters Mr Whiteaves’s diagnosis was 
principally founded, while his specimen, on the other hand, 
did not display the ornamentation of the scales or cranial 
bones. Mr Whiteaves mentions, however, the occurrence of 
two large scales, showing a sculpture resembling that of the 
scales of G. leptopterus, and which he thinks may indicate a 
second species; he also states that, “it is however possible 
that they may have belonged to large and adult examples of 
G. Quebecensis, and that the specimen upon which that species 
is based may be a very immature individual.” I accept the 
latter alternative in the meanwhile, rather than name a new 
species without sufficient warrant. . 
RHIZODONTIDA. 
Eusthenopteron Foordi, Whiteaves. 
Eusthenopteron Foordi, Whiteaves, Canadian Nat., N.S., vol. x., 1881, 
p. 31; Trans. Roy. Soc. Canada, vol. vi., sect. iv., 1889, p. 79, 
pl. v., fig. 5, pls. vi., vii; R. H. Traquair, Geol. Mag. (3), vol. 
vii., 1890, p. 17; A. S. Woodward, Cat. Foss. Fishes Brit. Mus., 
pt. ii, 1891, p. 362. 
The present series of specimens shows the large size 
attained by this fish, two nearly entire examples measuring 
respectively 23 and 24 inches in length, and each would be 
at least an inch longer were the extreme point of the tail 
preserved. 
Two points I wish to bring forward on the present occasion. 
The first is the presence of a small pineal foramen on the 
top of the skull between the frontal bones, in the very same 
position as in the Osteolepid genera Diplopterus Thursius and 
Osteolepis, in which it has been so long known to exist. 
The second is the palatal dentition. There is one large 
palatopterygoid bone similar to that which I figured nearly 
twenty years ago in 7'ristichopterus,' and which extends from 
the vomerine region in front to the articulation of the lower 
1 Trans. Roy. Soc. Edin., vol. xxvii., pl. fig. 3. 
