REPTILIA. 241 
ICHTHYOSAURWUS (continued)— 
trigonus, R. Owen, Rep. Brit. Assoc. 1839 (1840), p. 124; 
J. Morris, Cat. Brit. Foss., 1854, p. 350; J. Phillips, Geol. 
Oxford, 1871, p. 335, woodcuts cxxvi-cxxvili ; V. Kiprijanov, 
Mém. Acad. Imp. Sci. St. Pétersbourg, vol. xxviii, art. 8 
(1881), p. 90; R. Lydekker, Cat. Foss. Rept. B. M., pt. ii, 
1889, p. 22, woodcuts 12-14. 
Loc. Kim. Clay; Bury St. Edmunds and Ely ; Foxhangers, 
Stanton, Swindon, and Wootton-Bassett, Wiltshire ; Shot- 
over, near Oxford ; Kimeridge and Weymouth. [Vertebre ; 
unknown. (Lydekker regards the originals of Phillips’ figures 
as types.)] 
uniformis, H. G. Bronn, Index Palzont., 1848, p. 606; mis- 
quotation from Fleming, Brit. Anim., 1828, p. 154. 
walkeri, Seeley. v. Cetarthrosaurus walkeri. 
zetlaniicus, H. G. Seeley, Quart. Journ. Geol. Soc., vol. xxxvi, 
1880, p. 635, pl. xxv ; R. Lydekker, Cat. Foss. Rept. B. M., 
pt. ii, 1889, p. 76, woodcuts 28-30. 
Ichthyosaurus longifrons, R. Owen, Rept. Liassic Form., pt. iii 
(Pal. Soc., 1881), p. 118, pl. xxiii, f. 1-5, pl. xxiv, f. 1. pl. xxv, 
f. 1, pl. xxvi, f. 1, pl. xxvii, f. 2-5. [Cranium ; Brit. Mus.] 
Loc. U. Lias ; Whitby, and ? Vale of Belvoir, Leicestershire. 
[Cranium : Woodwardian Mus.] 
sp., H. E. Sauvage, Bull. Soc. Géol. France [3] vol. xv, 1887, 
p. 726, pl. xxvi. 
Loc. L. Lias; Watchet, Somersetshire. [Pectoral arch ; 
Boulogne Mus. ] 
? sp., R. Lydekker, Cat. Foss. Rept. B. M., pt. 1i, 1889, p. 94. 
Loc. Rhetic; Aust Cliff. [Tooth; Brit. Mus., no. R. 1342.] 
IGUANA, J. N. Laurenti, Syn. Rept., 1768, p. 47. 
europea, H. Filhol, Ann. Sci. Géol., vol. vili, 1877, p. 267 (euro- 
peana) ; R. Lydekker, Geol. Mag. [3] vol. v, 1888, p. 110, and 
Cat. Foss. Rept. B. M., pt. i, 1888, p. 277, woodcut 61. 
Proiguana europeana, H. Filhol, Ann. Sci. Géol., vol. viii, 1877, 
p. 338. 
Loc. U. Eocene; Hordwell. [Vertebre,; Brit. Mus.) 
IGUANODON,* G. A. Mantell, Phil. Trans., 1825, p. 184; R. Owen, 
Rep. Brit. Assoc., 1841 (1842), p. 120, and Paleontology, 
ed. 2, 1861, p. 293; L. Dollo, Bull. Mus. R. Hist. Nat. Belg., 
* The genus /guanodon was originally described from teeth, and subsequently 
from detached bones of various individuals. These detached teeth and bones were 
considered by the earlier observers to belong to one species, for which the names 
1. anglicum, F. Holl, 1829, and /. mante/li, H. von Meyer, 1832, were proposed ; 
but it was not until 1851, when R. Owen described a large portion of one individual 
(the Zguanodon of ‘G. F.,' i.e., Bensted’s specimen), that the species mantfel/i 
became satisfactorily defined. There is, therefore, doubt as to the specific identity 
of the various bones described before 1851, and we follow Dollo and Hulke in con- 
sidering Bensted’s specimen, now in the British Museum, as the type of the typical 
species of the genus, 
R 
