50 BRITISH FOSSIL VERTEBRATA. 
CTENACANTHUS major (continued)— 
Ctenacanthus salopiensis, J. W. Davis, Trans. Roy. Dublin Soc. 
[2] vol. i (1883), p. 339, pl. xliv, f. 6. [Spine ; Brit. Mus.] 
Loc. L. Carb. Limest.; Gloucestershire and Shropshire. 
[Spine ; Bristol Mus.] T. 
major, Thomson (zon Agassiz). v. Sphenacanthus hybodoides. 
minor, Davis. wv. Sphenacanthus minor. 
nodosus, Egerton. v. Sphenacanthus hybodoides. 
ornatus, L. Agassiz, Poiss. Foss., vol. ili (1837), p. 12, pl. ii, f. 1, 
and Poiss. Foss., V. G. R. (1845), pp. 111, 119; J. Morris, 
Cat. Brit. Foss., 1854, p. 323. [Genus non det.| 
Loc. Old Red Sandst.; Sapey, Worcestershire, and Wales. 
[Fragment of spine.] 
plicatus, J. W. Davis, Trans. Roy. Dublin Soc. [2] vol i (1883), 
P- 342, pl. xlv, f. 4. 
Onchus plicatus, L. Agassiz, Poiss. Foss., vol. ili (1843), p. 177 
(name only). 
Loc. L. Carb. Limest.; Armagh. [Spine ; Geol. Soc. London.] 
? pustulatus, J. W. Davis, Trans. Roy. Dublin Soc. [2] vol. i 
(1883), p. 344, pl. xlv, f. 2. [? Asteroptychius.| 
Loc. L. Carb. Limest.; Armagh. [Spine ; Brit. Mus.] 
rectus, J. W. Davis, Trans. Roy. Dublin Soc. [2] vol. i (1883), 
p. 345, pl. xlv, f. 5. 
Onchus rectus, L. Agassiz, Poiss. Foss., vol. iii (1843), p. 177 
(name only). 
Loc. L. Carb. Limest.; Armagh. [Spine ; Geol. Soc. London.] 
salopiensis, Davis. v. Ctenacanthus major. 
serrulatus, Traquair. wv. Sphenacanthus serrulatus. 
sulcatus (Agassiz), J. W. Davis, Trans. Roy. Dublin Soc. [2] 
vol. 1 (1883), p. 343, pl. xlv, f. 3. 
Onchus sulcatus, L. Agassiz, Poiss. Foss., vol. iii (1837), p. 8, 
pl. i; f. 6; J. Morris, Cat. Brit. Foss., 1854, p.334- 
Loc. L. Carb. Limest.; Gloucestershire, Shropshire, and 
? Armagh. [Spine; Bristol Mus.] 
tenuistriatus, Agassiz. v. Ctenacanthus major. 
CTENODUS, L. Agassiz, Poiss. Foss., vol. iii (1838), p. 137; A. Han- 
cock and T. Atthey, Ann. Mag. Nat. Hist. [4] vol. vii, 1871, 
p. 190, and Nat. Hist. Trans. Northumb. and Durham, 
vol. iv (1872), p. 397; A. Fritsch, Fauna der Gaskohle, 
vol. 11, pt. 3, 1888. 
CAMPYLOPLEURON, T. H. Huxley and E. P. Wright, Trans. 
Roy. Irish Acad., vol. xxiv, 1866, p. 353. 
SAGENODUS, R. Owen, Trans. Odontol. Soc., vol. v, 1867, p. 365. 
PETALODOPSIS, W. J. Barkas, Monthly Rev. Dental Surgery, 
vol. ii, 1874, p. 538. 
