1900.] HAY—VERTEBRATES OF CARBONIFEROUS AGE, 119 
had such scales in this region as he has represented, it seems 
probable that those in my hands belong to a distinct species. These 
high scales gradually become reduced in height, so that those below 
the dorsal fin are about as high as long. The specimen 50 mm. 
long does not show so well the height of the anterior scales, and it 
is quite probable that the height increases with the size of the fish. 
They are shown in the Columbia University specimen. The type 
of Dr. Newberry’s species was five inches long and ought to have 
revealed these high scales. 
The caudal fin of the present specimens is very different from 
that represented in Dr. Newberry’s figures, but this is probably due 
to the imperfection of his materials. In his figures the tail is rela- 
tively short and single-lobed, while the scaly extension of the 
body beyond the beginning of the fin is less than one-fourth of 
the length of the fish. In my material the caudal fin is fully one- 
third the total length of the fish, is deeply forked and has the pro- 
longation of the body covered with pointed scales carried out ap- 
parently to its very tip. I count in the longest specimen seventy- 
five rays, in the Columbia University specimen about sixty, but 
some are probably missing in the case of both fishes. Along the 
upper lobe of the tail are numerous striated fulcra. These diminish 
in height each way from the middle of the lobe. 
The dorsal fin contains about twenty-five rays. I count a few 
more in the large specimen, a few less in that belonging to Co- 
lumbia University. The fin base equals about one-seventh of the 
length of the fish, the height is somewhat greater. There were 
about twenty-five ventral rays, possibly afew more. Dr. Newberry 
states that in his specimen there were only ten pectoral rays, but 
undoubtedly it was defective. I count easily twenty rays in the 
large specimen, in which the fin is well displayed. The anal fin 
contains about forty rays, and its length was about equal to that of 
the dorsal. 
I do not find that the ornamentation of the scales is different 
from that described by Newberry. Of the scales there seem to be 
eight rows above the lateral line and fourteen rows below it. 
The body appears to have been somewhat elevated immediately 
under the dorsal fin, the latter being thus lifted somewhat. The 
sides of this elevation are covered with two rows, an upper and a 
lower, of narrow, rather long scales, which are directed parallel 
with the fin rays. The lower jaw, as shown by specimen No. 2 
