138 BRITISH FOSSIE VERTEBRATA. 
OXYRHINA mantelll (comtinuwed)— 
1835); F. Dixon, Geol. Sussex, 1850, descr. to pl. xxx, f. 19; 
J. Morris, Cat. Brit. Foss., 1854, p. 331. [Teeth; Brit. Mus.] 
Loc. U.Greensand; Dorsetshire and Somersetshire. Chloritic 
Marl ; Ventnor, I. of Wight. Cambridge Greensand. Chalk ; 
Sussex, Surrey, Kent, and Essex. [Teeth; Brit. Mus.] 
paradoxa, Agassiz. v. Hybodus striatulus. 
plicatilis, Agassiz. v. Oxyrhina hastalis. 
quadrans, Agassiz. v. Oxyrhina hastalis. 
retrvoflexa, Agassiz. v. Oxyrhina hastalis. 
trigonodon, Agassiz. 7. Oxyrhina hastalis. 
xiphodon, Agassiz. v7. Oxyrhina hastalis. 
PACHYCEPHALUS, L. Agassiz, Poiss. Foss., vol. v, pt. i (1843), 
p. 139 (name only), and Rep. Brit. Assoc., 1844 (1845), p. 308 
(name only). 
cristatus, L. Agassiz, zb/d., p. 139 (name only), and zdid., p. 308 
(name only). 
Loc. London Clay ; Sheppey. [Imperfect head; Brit. Mus.] T. 
PACHYCORMUS, L. Agassiz, Poiss. Foss., vol. ii, pt. ii (1843), 
p. IIo. 
acutiroestris, L. Agassiz, 7é7d., p. 114 (undefined). 
Loe; UW: lias); Whitby 
branchialis (Agassiz, MS.), J. Morris, Cat. Brit. Foss., 1854, 
p. 336 (name only). 
Loc. L. Lias; Lyme Regis. [Fish; Brit. Mus.] 
eurtus, L. Agassiz, Poiss. Foss., vol. ii, pt. 11 (1843), p. 112, pl. lix ; 
J. Morris, Cat. Brit. Foss., 1854, p. 336. 
Loc. U. Lias; Whitby. [Fishes; Brit. Mus. and Scarborough 
Mus. ] 
gracilis, L. Agassiz, Poiss. Foss., vol. 11, pt. ii (1843), p. 114 (unde- 
fined). 
Ureus gracilis, L. Agassiz, Neues Jahrb., 1832, p. 142 (name 
only). 
Loc. U. Lias ; Whitby. 
heterurus, L. Agassiz, Poiss. Foss., vol. 11, pt. i1 (1843), p. 113, 
pl. lviiia, f. 4,5; J. Morris, Cat. Brit. Foss., 1854, p. 336. 
Loc. L. Lias; Lyme Regis. [Tail ; Oxford Mus.] 
latipennis, L. Agassiz, Poiss. Foss., vol. ii, pt. ii (1843), p. 114 
(undefined); J. Morris, Cat. Brit. Foss., 1854, p. 336; 
P, M. G. Egerton, Figs. and Descript. Brit. Organic Remains, 
dec. ix (Mem. Geol. Surv., 1858), no. 3, pl. iil. 
Loc. L. Lias; Lyme Regis. [Head, pectoral fin, scales; Brit. 
Mus. } 
