92 BRITISH FOSSIL VERTEBRATA. 
GYROSTEUS, L. Agassiz, Poiss. Foss., vol. ii, pt. ii (1843), p. 179 
(name only) ; He Ss "Woodward, Proc. Geol. Assoc., vol. xi 
(1889), p. 36. 
mirabilis, L. Agassiz, Poiss. Foss., vol. ii, pt. ii pees Pp. 179 
(name only) ; J. Morris, Cat. Brit. Foss.,1854, p. G. 
Egerton, Phil. Trans. , 1858, p:.883.5\ J. iE, Bake i in Tate and 
Blake, Yorksh. Lias, 1876, p: 256, pl..it, & 2. 3° "A. S. Wood- 
ward, Proc. Geol. Assoc., vol. xi (1889), p. 32, woodcuts 2-7. 
Sepia incomposita, M. Simpson, Foss. Yorkshire Lias, 1855, 
p. 21. [Bone ; Whitby Mus.] 
Loc. U. Lias; Whitby. [Various bones ; Brit. Mus.] =~ 
HALECOPSIS., L. Agassiz, Poiss. Foss., vol. v, pt. 11 (1843), p. 139, 
and Rep. Brit. Assoc., 1844 (1845), p. 308 (name only). 
teevis, L. Agassiz, zé#d. (1843), p. 139, and zzd., 1844, p. 308 
(name only). 
Loc. London Clay; Sheppey. [Imperfect fish ; Brit. Mus.] T. 
HARPACANTEUS, R. H. Traquair, Ann. Mag. Nat. Hist. [5} 
vol. xvill, 1886, p. 493. 
fimbriatus ( Stock), R. H. Traquair, zé7d., p. 493, woodcut. 
Tristychius fimbriatus, T. Stock, Ann. Mag. Nat. Hist. [5] 
vol. xii, 1883; p. 177, pl. vil, £ 1. 
Loc. M. Carb. Limest.; Gilmerton, near Edinburgh. [Spine ; 
Edinburgh Mus. ] T. 
HARPACODUS, Davis. v. Ctenoptychius. 
clavatus, Davis. wv. Venustodus clavatus. 
dentatus (Owen), Davis. v. Ctenoptychius dentatus. 
HARPACTES, Egerton. v. Harpactira. 
velox, Egerton. v. Harpactira velox. 
HARPACTIRA, I. M. G. Egerton, Geol. Mag. [2] vol. iii, 1876, 
p. 576. 
HARPACTES, P. M. G. Egerton, 7d¢d., p. 441 (preoccupied). 
velox, P. M. G. Egerton, 7é/d., p. 441 (Harpactes). 
Loc. L. Lias; Lyme Regis. [Fish; Brit. Mus.] T. 
HELODUS, L. Agassiz, Poiss. Foss., vol. iii (1838), p. 104. 
{A provisional generic name principally applied to undeter- 
mined anterior teeth of Cochlexinanidss (A. S. Woodward, 
Cat. Foss. Fishes B. M., pt. i, 1889, p. 218).] 
LoPpHopus, H. Romanovsky, Bull. Soc. Imp. Nat. Moscou, vol. 
XXXVil, pt. ii, 1864, p. 160. 
acutus, J. W. Davis, Trans. Roy. Dublin Soc. [2] vol. i (1883), 
p..455, pl. lee a 
Loc. L. Carb. Limest.; Armagh. [Tooth; Brit. Mus.]} 
