262 Dr. Rk. H. Traquair—New Coal-measure Palewoniscide. 
The scales are best seen in the smaller specimen, and are rather 
large for the size of the fish, one from the middle of the flank 
measuring 3's inch in height by +s in breadth. Over most of the 
body they are higher than broad, but behind the dorsal fin they 
become more equilateral and obliquely rhomboidal. The anterior 
covered area is very narrow; the sculpture of the exposed part is 
peculiar, and different from that in any other Carboniferous Ganoid 
with which I am acquainted. Taking one of the flank scales, its 
external glittering surface is ornamented by delicate wrinkles, a few 
of which run parallel with the anterior margin, while behind these 
and over the greater part of the surface they run in an antero- 
posterior direction, ending in delicate denticulations of the hinder 
margin; anteriorly, however, these transverse ridges and furrows do 
not run parallel with each other, but tend to converge in two or 
three groups. This ornament becomes less marked in the scales 
behind the dorsal fin, the vertical striz disappearing, and the scale 
appearing marked only with a few irregular horizontal furrows; the 
delicate denticulation of the posterior is, however, preserved as far as 
the tail pedicle, where the specimen is broken off. 
Remarks.—The form of the scales, and the structure and position 
of the ventral, dorsal, and anal fins, induce me to class this little 
fish as an BHlonichthys, though unfortunately the character of the 
dentition, and the form of the pectoral fin are unknown, while the 
bones of the head are not in a condition to be described. As a 
member of this genus it is distinguished by its rather slender form, 
and proportionally large scales, with their peculiar ornament. 
Geological Position and Locality—Fyrom the Dalemoor Rake Iron- 
stone, Lower Coal-measures, Stanton, Derbyshire, where it is asso- 
ciated with Hlonichthys Aitkeni, Traq.; Platysomus tenuistriatus, Traq. ; 
and Mesolepis micropterus, Trag. The two specimens which have 
served for the above description are in the collection formed by the 
late Mr. E. W. Binney, of Manchester, who lent them to me some 
years before his death. The notes, taken of them at that time, are 
now for the first time published, and the drawings will appear in the 
continuation of my Monograph on the Carboniferous Ganoid Fishes 
of Great Britain. 
Gonatodus Molyneuxi, Ward, sp. MS. 
The largest specimen of this little fish which I have seen is 
scarcely more than three inches in length; the shape is fusiform, 
rather “stumpy ”; the length of the head is contained about 43 times 
in the total. Cranial roof bones ornamented with closely placed, 
contorted, thread-like ridges; jaws armed with apparently one row of 
comparatively stout stylo-conical bluntly-pointed teeth, which are 
slightly incurved towards the apex. Scales proportionally large ; 
covered surface narrow; exposed surface, in the flank scales, 
marked in front with a few exceedingly delicate vertical grooves or 
strie turning round below parallel with the lower margin, the rest 
of the surface being marked posteriorly with nearly equally minute 
transverse striz ending on very delicate denticulations of the hinder 
