1 86 BRITISH FOSSIL VERTEBRATA. 



SPHENACAKIHUS serrulatus (continued)— 



Ctenacanthus ? serrulatus, R. H. Traquair, Geol. Mag. [3] vol. i, 



1884, p. 6. 

 LOC. Calcif. Sandst. ; Burdiehouse, near Edinburgh. [Spine ; 



Edinburgh Mus.] T. 



sp. ? A. S. Woodward, Cat. Foss. Fishes B. M., pt. i, 1889, p. 244. 

 LOC. U. Coal-Meas. (Ardwick Limest.) ; Ardwick, near Man- 

 chester. [Spine ; Brit. Mus., no. 41251 #.] 



SPHEXOXCHUS, L. Agassiz, Poiss. Foss., vol. iii (1843), p. 201. 

 A provisional genus founded upon head-spines of Hybodus 

 (E. Charlesworth, Mag. Nat. Hist., n.s., vol. iii, 1839, p. 242), 

 Acrodus (A. S. Woodward, Cat. Foss. Fishes B. M., pt. i, 

 1S89, P- 2 9°X an d Asleracanthus (A. S. Woodward, Ann. 

 Mag. Nat. Hist. [6] vol. ii, 1888, p. 340). Said to have been 

 originally named Leiosphe?i in collections (L. Agassiz, Poiss. 

 Foss., vol. iii (1843), P- 201 )- 



elongatus, L. Agassiz, Poiss. Foss., vol. iii (1843), P- 2 ° 2 > pi- xxn * a i 

 f. 18 ; J. Morris, Cat. Brit. Foss., 1854, p. 344. 

 LOC. Wealden ; Sussex. [Spine ; Brit. Mus.] 



Jiamatus, L. Agassiz, Poiss. Foss., vol. iii (1843), p. 202, pi. xxii a, 

 f. 12-14 ; J. Morris, Cat. Brit. Foss., 1854, p. 344. 'Tooth, 5 

 H. T. De La Beche, Trans. Geol. Soc. [2] vol. i (1822), p. 44, 

 pi. iv, f. 4, 5 ; W. Buckland, Geol. and Mineral., ed. 2 (1837), 

 pi. xxvii d, f. 6, 7. 

 LOC. L. Lias ; Lyme Regis. [Spine.] T. 



■martini, Agassiz. v. Hybodus lawsoni. 



(Hybodus obtusus, J. W. Davis, Quart. Journ. Geol. Soc, 



vol. xxxvii, 1 88 1, p. 420. pi. xxii, f. 7. 

 LOC. Rhaetic ; Aust Cliff, near Bristol. [Spine ; J. W. Davis 

 Coll.] 



sp : ' Tooth of Fish,' T. Webster, Trans. Geoi. Soc. [2] vol. ii 

 (1826), p. 35, pi. vi, f. 8. 

 LOC. Wealden ; Sussex. [Spine.] 



sp. Recorded from Lias of Weston, near Bath, and Wealden of 

 Isle of Wight (E. Charlesworth and H. Woods, Mag. Nat. 

 Hist., n.s., vol. iii, 1839, pp. 279, 282) : also from Kimeridge 

 Clay, Weymouth ; Purbeck Beds, Swanage ; Wealden, 

 Sussex ; and Grey Chalk, Dover (A. S. Woodward, Cat. 

 Foss. Fishes B. M., pt. i, 1889, pp. 303, 305). 



SPHYR^EXODUS, Agassiz. v. Dictyodus. 

 crassidens, Agassiz. v. Dictyodus crassidens. 

 gracilis, Dixon, v. Dictyodus tenuis. 

 priscus, Agassiz. v. Dictyodus priscus. 

 tenuis, Dixon, v. Dictyodus tenuis. 



