REPORT ON FOSSIL FISHES. 51 
Geological Position and Locality—From the Cement-stone group of the 
Calciferous Sandstone series, near Glencartholm, Eskdale. 
Canobius pulchellus, sp. nov. Traquair. 
Pl. V. figs. 9-13. 
Description.—The length of one absolutely entire specimen is 2} inches ; 
that of another, larger, but deficient in the extremity of the upper lobe of the 
caudal fin, is 834 inches. The length of the latter specimen, when entire, would 
probably amount to + inch more. 
The length of the head is pretty nearly equal to the greatest depth of the 
body, and is contained slightly more than 43 times in the total. The shape is 
fusiform, the body being deepest midway between the head and the commence- 
ment of the dorsal fin, and thence tapering rapidly and elegantly towards the 
tail pedicle. 
The cranial roof bones are ornamented with small rounded tubercles, which 
sometimes tend to become elongated, specially on the posterior or parietal 
region. The ethmoidal region forms a rounded projection over the mouth; the 
orbit is large and anteriorly placed. The suspensorium is more oblique than 
in Canobius Ramsayi or Canobius elegantulus, but less so than in typical 
Paleoniscide ; the posterior margins of the opercular and interopercular bones 
pass into each other so as to form a continuous gently curved line. The oper- 
culum is a small oblong plate, with rounded inferior margin and _ posterior- 
inferior angle ; interoperculum, nearly equalling it in size, has its upper margin 
correspondingly concave, and its posterior-superior angle slightly produced 
upwards. The preeoperculum cannot be very distinctly made out, but I rather 
suspect that it more resembles that bone in typical Paleoniscide than in Cano- 
bius Ramsayi. The maxilla is elongated, and its shape is decidedly paleeo- 
niscoid, though its broad posterior part is not so suddenly cut away for the 
orbit as in more typical forms; the mandible is slender and tapering, but 
neither in it nor in the maxilla are any teeth discernible. All the facial bones 
are ornamented with delicate ridges, usually flexuous, though on the mandible 
they are pretty straight, parallel with the inferior margin, and touching the 
superior one at acute angles, owing to the tapering shape of the bone. On the 
narrow infra-orbital part of the maxilla the ridges pass into rows of tubercles, 
which pass obliquely downwards and backwards, or, conversely, upwards and 
forwards. The scales are moderate in size; the median row of scales between 
the head and dorsal fin is rather conspicuous, but not so much so as in 
Canobius Ramsayi and Canobius elegantulus. Taking a flank scale as an 
example, the covered area is narrow, the ganoid one sculptured with closely 
set bold ridges and furrows, forming a pattern which, in its main features, is 
characteristic of a large number of Paleoniscide. There are first a few 
