REPTILIA. 269 
PLESIOSAURWUS (continued)— 
levis, R. Owen, Cat. Foss. Rept. Mus. Roy. Coll. Surgeons, 1854, 
p. 62. Immature P/éosaurus, according to R. Lydekker, Cat. 
Foss. Rept. B. M., pt. ii, 1889, p. 139. 
Loc. Kim. Clay. [Vertebra ; Mus. R. Coll. Surgeons. ] 
limnophilus, Koken. v. Cimoliosaurus limnophilus. 
longirostris, J. F. Blake, in Tate and Blake, Yorkshire Lias, 
1376, p. 250, pl.i, f. 6, pl. inf 2; R. Lydekker, Cat..Foss. 
Rept. B. M., pt. ii, 1889, p. 271. [? P. c@lospondylus.] 
Loc. Lias; Whitby. [Head.] 
macrocephalus, W. Buckland (ex Conybeare, MS.), Geol. and 
Mineral., ed. 2, 1837, vol. ii, p. 30, pl. xix, f. 1; R. Owen, 
Rep. Brit. Assoc., 1839 (1840), p. 62, and Trans. Geol. Soc. 
[2] vol. v (1838), p. 515, pls. xlili, xlv ; J. Morris, Cat. Brit. 
Foss., 1854, p. 352; S. Haughton, Man. Geology, 1865, 
p- 274, woodcut 29; H. G. Seeley, Ann. Mag. Nat. Hist. [3] 
vol. xv, 1865, p. 50; R. Lydekker, Cat. Foss. Rept. B. M., 
pt. ii, 1889, p. 266; M. Browne, Vert. Animals Leicester- 
shire, 1889, p. 181. [See also Thaumatosaurus propinguus.| 
Plesiosaurus brachycephalus, R. Owen, Rep. Brit. Assoc., 1839 
(1840), p. 69, and Brit. Foss. Rept., vol. iii (1884), p. 178, 
pl. xv (Enaliosauria); J. Morris, Cat. Brit. Foss., 1854, 
p. 352; H. G. Seeley, Ann. Mag. Nat. Hist. [3] vol. xv, 1865, 
p. 50; W. J. Sollas, Quart. Journ. Geol. Soc., vol. xxxvil, 
1881, p. 479, pl. xxiv, f.2. [Skeleton ; Bristol Mus.] 
Loc. L. Lias; Bitton, Gloucester, Lyme Regis, Street, Weston 
(near Bath),and Whitby. [Imperfect skeleton ; Brit. Mus.] 
macrodeirus, Seeley. v. Cimoliosaurus trochanterius. 
macromus, R. Owen, Rep. Brit. Asscc., 1839 (1840), p. 72 ; 
J. Morris, Cat. Brit. Foss., 1854, p. 352. 
Loc. Lias ; Lyme Regis. [Imperfect skeleton; Oxford Mus.] 
macropterus, Seeley. v. Eretmosaurus macropterus. 
manseli, Hulke. v. Cimoliosaurus trochanterius. 
megacephalus, Stutchbury. v. Thaumatosaurus megacephalus. 
megadeirus, Seeley. v. Cimoliosaurus trochanterius. 
megapleuron, R. Owen, Cat. Foss. Rept. Mus. Roy. Coll. 
Surgeons, 1854, p. 60. 
Loc. Unknown. [Cervical vertebree ; Mus. R. Coll. Surgeons.] 
microdeirus, H. G. Seeley, Index to Aves, etc., Woodwardian 
Mus., 1869, pp. xvill, 40 (name only). 
Loc. Cambridge Greensand. [Portions of skeleton ; Wood- 
wardian Mus.] 
neocomiensis, Owen. v. Cimoliosaurus cantabrigiensis. 
ophiodeirus, H. G. Seeley, Index to Aves, etc., Woodwardian 
Mus., 1869, pp. xviii, 44 (name only). 
Loc. Cambridge Greensand. [Portion of skeleton ; Wood- 
wardian Mus.] 
oxoniensis, Phillips. wv. Cimoliosaurus oxoniensis. 
pachyomus, Owen. v. Cimoliosaurus bernardi and C. planus. 
