CCELACAXTHIDiE. 
407 
Coelacanthus huxleyi, Traquair. 
[Plate XIV. fig. 1.] 
1881. Coelacanthus linxleyi , R. H. Traquair, Trans. Roy. Soc. Edinb. 
vol. xxx. p. 20, pi. i. figs. 1-4. 
1888. Rliabdoderma huxleyi, O. M. Reis, Palseontogr. vol. xxxv. p. 5. 
Type. Imperfect fishes ; Geological Surrey of Scotland. 
A small species, attaining a maximum length of about 0*18. 
Trunk robust but elongated ; head with opercular apparatus occu¬ 
pying about one fourth of the total length. Dorsal fins of relatively 
large size, the first consisting of very stout rays and situated slightly 
in advance of the pelvic pair, the second consisting of more 
numerous slender rays ; principal caudal fin comprising about 14 
stout rays above and below. Jugular plates four times as long as 
broad, ornamented with few, delicate, concentric striae; opercular 
bones three-quarters as broad as deep, smooth or feebly striated : 
head-bones in part marked with few coarse striae, sometimes divided 
into elongated tubercles ; scales externally ornamented with very 
delicate, widely spaced, posteriorly converging striae. 
Form. 4’ Loc. Calciferous Sandstones (Cement-stone Group): 
Eskdale, Dumfriesshire. 
P. 4079 a. Large individual, in counterpart, wanting terminal 
caudal fin, probably originally about 0*18 in total length. 
A jugular plate, the opercular bones, and calvicle, as 
preserved, exhibit none but the faintest external ornamen¬ 
tation ; but one of the cheek-plates is externally marked 
with a few coarse concentric striae and irregular tubercles. 
Purchased , 1883. 
P. 4079 b. Specimen about 0*105 in length, with imperfect head 
and fins. Purchased , 1883. 
P. 4080 a. Small individual showing the terminal caudal fin, 
represented, of the natural size, in PI. XIV. fig. 1, the 
scales and jugular plate being enlarged three times in 
figs. 1 a, 1 b. Purchased , 1883. 
P. 4080 b. Similar specimen, displaying the dorsal fins. 
Purchased, 1883. 
P. 4079-80. Six small fishes, some showing smooth opercular bones. 
Purchased, 1883. 
P. 5983. Small individual. 
Purchased , 1889. 
