[WHITEAVES] FOSSIL FISHES OF THE DEVONIAN ROCKS 257 
mined. Six spines are shown, which I interpret as two pectoral, two 
ventral, one dorsal and one anal. The spines are large and rather 
slender; the pectoral measuring 1% inch in length, and 14 inch in 
breadth about the middle, the dorsal 214 inches. The others are 
imperfect, but all are remarkably straight save the pectoral, which is 
gently curved. The exposed surface of the spines is marked by 
prominent longitudinal ridges and furrows, there being four to six 
on each side, while the median one along the anterior aspect of the 
spine is broader than the others. There are two clavicular elements 
near the pectoral spines which resemble in form rather more those of 
Cheiracanthus than of Acanthodes. The scales are marked on their 
exposed surfaces with extremely fine strive, which are only visible under 
a strong lens, and pass longitudinally across the scale in a direction 
parallel to the diagonal, connecting the anterior and posterior angles.” 
(4) CLIMATIUS? LATISPINOSUS (Whiteaves). 
Ctenacanthus latispinosus. Whiteaves. 1881. Canad. Nat. & Quart. Journ. Sc. 
vol. 10, no. 2, p. 99; and (1889) Trans. Royal 
Soc. Canada for 1888, vol. vi, sect. iv, p. 95. pl. x. 
figs. 3, 3a and 36. 
Climatius latispinosus, A. Smith Woodward. 1889. Ann. & Mag. Nat. Hist., ser. 
6, vol. iv, p. 183. 
Climatius ? latispinosus, A Smith Woodward. 1891. Cat. Foss. Fishes Brit. 
Mus., pt. ii, D. 33. 
Clima ‘ius latispinosus, A. Smith Woodward. 1892. Geol. Mag., dec. 3, vol. viii, 
Dano: 
Type.—Detached fin spines; in the Museum of the Geological 
Survey at Ottawa. As shown in the second of the foregoing references, 
these spines were first referred to the Acanthodian genus Climatius 
by Dr. A. S. Woodward in 1889. Similar spines from Campbellton, 
collected by Mr. Jex in 1891, are now in the Geological Department of 
the British Museum (Nat. Hist.). 
Genus Doxiopus, Traquair. 
Doliodus, Traquair. 1893. Geol. Mag., dec. 3, vol. x, p. 145. 
(5) Do topus PROBLEMATICUS (Woodward). 
Diplodus problematicus, A. Smith Woodward. 1892. Geol. Mag., dec. 3, vol. viii, 
Dialer fig 
Doliodus problematicus, Traquair. 1898. Idem, vol. x, p. 146. 
Original description of Diplodus problematicus. “The single 
tooth referred to appears to be destitute of the root and exhibits only 
the outer face of the crown. It is shown of three times the natural 
