160 Miscellaneous. 
large and interesting collection of fossil fishes. Fully four fifths of 
the entire number of specimens in this collection are referable to 
the genus Pterichthys, which at this locality seems to be represented 
by only one species, P. canadensis. Some of these are nearly per- 
fect, and want only the fins proper and the tail, while others are 
mere isolated plates or detached portions of the pectoral spines. 
One of the specimens shows that the Canadian Pterichthys 
had two labial appendages or barbels attached to the front margin 
of the head. These barbels are almost exactly similar in shape to 
those indicated by dotted lines in the ideal representation of the 
genus Pterichthys on plate vi. of the ‘Monographie des Poissons 
fossiles du Vieux Grés Rouge,’ which Agassiz claims to have 
seen in his P. latus; but in P. canadensis the barbels are very close 
together at their bases. In two other specimens of a Pterichthys 
collected by Mr. Foord two remarkable, flattened, conical dermal 
processes are plainly visible on the helmet, one on each side of the 
orbital cavity. Posteriorly each process appears to fit into the 
angle formed by the junction of the prelateral with the nuchal and 
postlateral plates, while anteriorly they are each directed obliquely 
outward and forward across the prelaterals, which they partly cover. 
In one of the specimens the dermal processes, which are orna- 
mented with a sculpture precisely similar to that of all the other 
plates, are half an inch long and 23 lines broad near their base. 
They taper gradually from their base to an obtuse point, and are 
pressed close to the surface of the helmet. 
In addition to these remains of Pterichthys, there are examples of 
eight or nine species of fossil fishes in Mr. Foord’s collection, which 
belong to at least seven genera. The following is a brief descrip- 
tion of the most striking characters of six of these species, the 
affinities of the remainder not having yet been satisfactorily ascer- 
tained :-— 
Dip lacanthus. 
Two specimens, one showing scales and longitudinally-grooved 
fin-spines, and the other a large portion of the body of a small 
smooth-scaled Diplacanthus, very like the D. striatus of Agassiz, 
and possibly identical with that species. 
Phaneropleuron curtum, sp. nov. 
Four crushed and distorted but nearly perfect examples and 
several fragments of a new species of Phaneroplewron, which differs 
from the P. Anderson of Huxley, from the Old Red Sandstone of 
Dura Den, in its smaller size and in its much greater height or depth 
as compared with its length. P. Andersoni is represented as being 
about five and a half times as long as high, whereas in the largest 
specimen of P. curtum yet collected, which is 6 inches long, the 
length is not much more than twice the height. 
