a 66 BRITISH FOSSIL VERTEBRATA. 



PLESIOSAURUS, \V. D. Conybeare, Trans. Geol. Soc, vol. v 

 (1821), p. 560 ; T. H. Huxley, Quart. Journ. Geol. Soc, vol. 

 xiv, 1858, p. 281 ; L. Barrett, Rep. Brit. Assoc, 1858 (1859),. 

 Sect., p. 78, and Ann. Mag. Nat. Hist. [3] vol. ii, 1858, 

 p. 361, pi. xiii (atlas and axis) ; R. Owen, Rep. Brit. Assoc. r 

 1839 (1840), p. 49, and Ann. Mag. Nat. Hist., vol. xx, 1847, 

 p. 217 (atlas and axis), and Palaeontology, ed. 2, 1861, p. 243,. 

 and Quart. Journ. Geol. Soc, vol. xxxix, 1883, p. 134; H. G. 

 Seeley, Rep. Brit. Assoc, 1887 (1888), p. 697, and GeoL 

 Mag. [3] vol. iv, 1887, p. 562 (development of young.) 



cequaliSi Phillips, v. Peloneustes aequalis. 



ajfinis, Owen. v. Cimoliosaurus trochanterius. 



arcnatus, Owen. v. Thaumatosaurus arcuatus. 



bernardi, Owen. v. Cimoliosaurus bernardi. 



? bitractensls, H. E. Sauvage, Ann. Sci. Ge"ol., vol. xiv, art. 3, 

 1883, p. 20, pi. viii, f. 5, pi. ix, f. 1, 2 ; R. Lydekker, Cat. 

 Foss. Rept. B. M., pt. ii, 18S9, p. 283. 

 LOC. Rhsetic ; Aust Cliff. \Vertebrce ; Brit. Mus.] 



brachistospondylus, Hulke. v. Cimoliosaurus brachistospon- 



dylus. 

 brachycephalus, Owen. v. Plesiosaurus macrocephalus. 

 brachyspondylus, Owen. v. Pliosaurus brachyspondylus. 

 bracJn/S2>otidf/7iis, Phillips, v. Cimoliosaurus trochanterius. 

 carinatus, Cuvier. v. Thaumatosaurus carinatus. 

 carinattiSf Phillips, v. Cimoliosaurus portlandicus. 

 clidiichus, Seeley. v. Plesiosaurus dolichodeirus. 

 ccelospondyhis, R. Owen, Rept. Liassic Form., pt. i (Pal. Soc, 



1865), p. 12 (incompletely defined) ; J. F. Blake, in Tate and 



Blake, Yorkshire Lias, 1876, p. 252. [? P. longi?-ostris.~\ 

 LOC. U. Lias ; Whitby. [Vertebrae ; Whitby Mus.] 

 compressus, R. Owen, Cat. Foss. Rept. Mus. Roy. Coll. 



Surgeons, 1854, p. 61. 

 LOC. Lias; Somerset. [Dorsal vertebra; Mus. R. Coll. Surgeons.] 

 constrictus, Owen. v. Cimoliosaurus constrictus. 



conybearei, [-ri] W. J. Sollas, Quart. Journ. Geol. Soc, vol. 



xxxvii, 1 88 1, p. 440, pis. xxiii, xxiv ; [-ri] R. Lydekker, Cat. 



Foss. Rept. B. M., pt. ii, 1889, p. 269. 

 Plesiosaurus laticeps (R. Owen, MS.), W. Davies, Geol. Mag., 



vol. iv, 1867, p. 144 (undefined). [Skeleton ; Brit. Mus.] 

 Plesiosaurus rosfratus, R. Owen (pars), Rept. Liassic Form., 



pt. i (Pal. Soc, 1865), p. 28, pi. xiii. [Skull ; Brit. Mus.] 

 LOC. L. Lias ; Lyme Regis. [Imperfect skeleton ; Bristol Mus.] 



costatus, R. Owen, Rep. Brit. Assoc, 1839 (1840), p. 80; 



J. Morris, Cat. Brit. Foss., 1854, p. 352 ; R. Lydekker, 



Cat. Foss. Rept. B. M., pt. ii, 1889, p. 282. 



? Plesiosaurus dibothrius, R. Owen, Cat. Foss. Rept. Mus. Roy. 



Coll. Surgeons, 1854^.63. [Vertebra ; Mus. R. Coll. Surgeons.] 



LOC. Rhaetic ; Aust Cliff. [Cervical vertebra ; Bristol Mus.] 



