nscEs. 185 



SPHENACANTHUS, L. Agassiz, Poiss. Foss., vol. iii (1837), 

 p. 23. 



sequistriatus (Davis), A. S. Woodward, Cat. Foss. Fishes B.M., 



pt. i, 1889, p. 244. 

 Ctenacanthiis czguistriatus,]. W. Davis, Quart. Journ. Geol. Soc, 



vol. xxxv, 1879, P- 185, pi. x, f. 15. 

 LOC. L. Coal-JMeas. ; Yorkshire. [Spine ; J. W. Davis Coll.] 



costellatus (Traquair), A. S. Woodward, Cat. Foss. Fishes 

 B. M., pt. i, 1889, p. 242. 

 Ctenacanthiis costellatus, R. H. Traquair, Geol. Mag. [3] vol. i, 



1884, p. 3, pi. ii, and ibid., vol. v, 1888, p. 81. 

 LOC. Calcif. Sandst. ; Eskdale, Dumfriesshire. [Fish ; Brit. 

 Mus.] 



hybodoides (Egerton), A. S. Woodward, Cat. Foss. Fishes B. M., 



pt. i, 1889, p. 242 ; J. Ward, Trans. N. Staffs. Inst. Mining 



Engin., vol. x (1889), pi. iii, f. 2. 

 Ctenacanthiis hybodoides, P. M. G. Egerton, Quart. Journ. Geol. 



Soc, vol. ix, 1853, p. 280, pi. xii ; J. Morris, Cat. Brit. Foss., 



1854, p. 323 ; J. Thomson, Trans. Geol. Soc. Glasgow, vol. 



iv, pt. i ( 1 87 1), p. 59, pis. ii, iii ; J. Ward, [Proc] N. Staffs. 



Nat. Field Club, 1875, P- 2I 5 ; ]• W. Davis, Quart. Journ. 



Geol. Soc, vol. xxxii, 1876, p. 335. 

 Ctenacanthiis nodosus, P. M. G. Egerton, Quart. Journ. Geol. 



Soc, vol. ix, 1853, p. 281 ; J. Morris, Cat. Brit. Foss., 1854, 



p. 323. [Spine ; Brit. Mus.] 

 Ctejiacanthus major, J. Thomson (non Agassiz), Rep. Brit. 



Assoc, 1869 (1870), Sect, p. 102. 

 Cladodus elegans, T. P. Barkas, English Mechanic, vol. xii 



( 1 871), p. 403, woodcut. [Tooth.] 

 Ctenacatithus (? and Cladodus), T. P. Barkas, Coal Meas. 



Palasont., 1873, p. 21, f. 43-58 (? p. 19, f. 31-34). 

 Hybodus, W. J. Barkas, Geol. Mag. [2] vol. i, 1874, P- ^3, and 



Proc. Roy. Soc. N. S. Wales, vol. xi (1878), p. 145. 

 ? Hybodus davisi, W.J. Barkas, Monthly Rev. Dental Surgery, 



vol. vii, 1878, p. 193. [Tooth ; J. W. Davis Coll.] 

 LOC. Coal-Meas. ; South Scotland, Northumberland, Yorkshire, 



Derbyshire, Staffordshire, and North Wales. [Spine ; Brit. 



Mus.] 



minor (Davis), A. S. Woodward, Cat. Foss. Fishes B. M., pt. i, 

 1889, p. 244. 



Ctenacanthus ?ninor, J. W. Davis, Geol. Mag. [2] vol. vi, 1879, 

 p. 531, woodcut. 



LOC. L. Coal-Meas. (Black-bed Coal) ; Dudley Hill, neat- 

 Bradford, Yorkshire. [Spine ; Bradford Mus.] 



serrulatus, L. Agassiz, Poiss. Foss., vol. iii (1837), p. 24, pi. i, 

 f. 11-13; J. Morris, Cat. Brit. Foss., 1854, p. 344; A. S. 

 Woodward, Cat. Foss. Fishes B. M., pt. i, 1889, p. 242. 



