REPTILIA. 241 



ICHTHYOSAURUS (continued)— 



trig" onus, 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-cxxviii ; V. Kiprijanov, 

 Mem. Acad. Imp. Sci. St. Pe'tersbourg, vol. xxviii, art. 8 

 (188 1), 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. [Vertebrae ; 

 unknown. (Lydekker regards the originals of Phillips' figures 

 as types.)] 



uniformist H. G. Bronn, Index Palaeont., 1848, p. 606; mis- 

 quotation from Fleming, Brit. Anim., 1828, p. 154. 



tvalheri, Seeley. v. Cetarthrosaurus walkeri. 



zetlandlcus, H. G. Seeley, Quart. Journ. Geol. Soc, vol. xxxvi, 

 1880, p. 635, pi. 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, pi. xxiii, f. 1-5, pi. xxiv, f. 1. pi. xxv, 

 f. 1, pi. xxvi, f. 1, pi. 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. Geol. France [3] vol. xv, 1887, 

 p. 726, pi. xxvi. 

 LOC. L. Lias ; Watchet, Somersetshire. [Pectoral arch ; 

 Boulogne Mus.] 

 ? sp., R. Lydekker, Cat. Foss. Rept. B. M., pt. ii, 1889, p. 94. 



LOC. Rhaetic ; Aust Cliff. [Tooth ; Brit. Mus., no. R. 1342.] 



IGUANA, J. N. Laurenti, Syn. Rept., 1768, p. 47. 



europasa, H. Filhol, Ann. Sci. Geol., vol. viii, 1877, p. 267 (euro- 

 ■pceana) ; R. Lydekker, Geol. Mag. [3] vol. v, 1888, p. 1 10, and 

 Cat. Foss. Rept. B. M., pt. i, 1888, p. 277, woodcut 61. 

 Proigua?ia europcea}ia, H. Filhol, Ann. Sci. Geol., vol. viii, 1877, 



P- 33%- 

 LOC. U. Eocene ; Hordwell. \_Vertebrce; Brit. Mus.] 



IGUAMODON, G. A.Mantell, Phil. Trans., 1825, p. 184; R. Owen, 

 Rep. Brit. Assoc, 1841 (1842), p. 120, and Palaeontology, 

 ed. 2, 1861, p. 293; L. Dollo, Bull. Mus. R. Hist. Nat. Belg., 



* The genus Iguanodon was originally described from teeth, and subsequently 

 from detached bones of various individuals. These detached teeth and bones wt re 

 considered by the earlier observers to belong to one species, for which the names 

 /. anglicum, F. Holl, 1829, and /. mantelli, H. von Meyer, 1832, were proposed ; 

 but it was not until 1851, when R. Owen described a large portion of one individual 

 (the Iguanodon of ' G. F. ,' i.e., Bensted's specimen), that the species mantelii 

 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 



