4 BRITISH FOSSIL VERTEBRATA, 
ACESTRUS, L. Agassiz, Rep. Brit. Assoc., 1844 (1845), p. 308 (name 
only). 
ornatus, L. Agassiz, 7é¢d., p. 308 (name only). 
Loc. London Clay; Sheppey. [Cianium; Brit. Mus.] T. 
ACIPENSER, Linnzus, Syst. Nat., ed. 12, vol. i, 1766, p. 403. 
toliapicus, L. Agassiz, Poiss. Foss., vol. ii, pt. ii (1843), p. 280 
(name only); J. Morris, Cat. Brit. Foss., 1854, p. 316; 
A. S. Woodward, Proc. Geol. Assoc., vol. xi (1889), p. 28, 
play f 1. 
Loc. London Clay; Sheppey. [Scutes; Brit. Mus.] 
sp., E. T. Newton, Vert. Forest Bed (Mem. Geol. Surv., 1882), 
p. 129, pl. xix, f. 6. 
Loc. Forest-Bed Series; Norfolk. [Cephalic plate; Mus. 
Pract. Geol.] 
sp., A. S. Woodward, Proc. Geol. Assoc., vol. xi (1889), p. 28, pl.i, f. 3. 
Loc. Red Crag; Suffolk. [Pectoral spines; York Mus.] 
sp., A. S. Woodward, Proc. Geol. Assoc., vol. xi (1889), p. 28, pl.i,f. 2, 
Loc. Hempstead Beds; Isle of Wight. [Scute; Brit. Mus., 
no. P. 5283.] 
sp., A.S.Woodward, Proc. Geol. Assoc., vol. xi(1889), p. 28, pl.i, f. 34. 
Loc. U. Eocene (Oligocene); Hampshire Basin. [Pectoral 
spine ; Brit. Mus., no. P. 1533a.] 
ACONDYLACANTEHUS, O. St. John and A. H. Worthen, Pal. 
Illinois, vol. vi, 1875, p. 432. 
attenuatus, J. W. Davis, Trans. Roy. Dublin Soc. [2] vol. i 
(1883), p. 352, pl. xlvi, f. 3. 
Loc. L. Carb. Limest.; Armagh. [Spine ; Woodwardian Mus.] 
colei, J. W. Davis, Trans. Roy. Dublin Soc. [2] vol. 1 (1883), p. 
S47, pl xlviit’7, ple xiviif. © 
Loc. L. Carb. Limest.; Armagh. [Spine; Brit. Mus.] 
distans (M‘Coy), J. W. Davis, Trans. Roy. Dublin Soc. [2] vol. i 
(1883), p. 349, pl. xlvi, f. 5. 
Ctenacanthus distans, F. M‘Coy, Ann. Mag. Nat. Hist. [2] 
vol. ii, 1848, p. 116, and Brit. Palaeoz. Foss. (1855), p. 625, 
pl. ili K, f. 15; J. Morris, Cat. Brit. Foss., 1854, p. 323. 
Loc. L. Carb. Limest.; Armagh. Carb. Limest.; Denbighshire. 
[Spine ; Woodwardian Mus. ] 
jenkinsoni (M‘Coy), O. St. John and A. H. Worthen, Pal. Illinois, 
vol. vi, 1875, p. 433; J. W. Davis, Trans. Roy. Dublin Soc. 
[2] vol. i (1883), p. 351, pl. xlvi, f. 2. 
Leptacanthus jenkinsont, F. M‘Coy, Brit. Palzoz. Foss. (1855), 
p-. 633, pl. iii G, f. 14-16. 
Loc. Carb. Limest.; Lowick, Northumberland. [Spine ; Wood- 
wardian Mus.) 
