REPTILIA. 271 



PLESIOSAURUS {continued)— 

 ? trigronus, Cuvier, Ossem. Fossiles, ed. 2, vol. v, pt. ii, 1824, p. 486 ; 

 R. Owen, Rep. Brit. Assoc, 1839 (1840), p. 78 ; J. Morris, 

 Cat. Brit. Foss., 1854, p. 352. 

 LOC. PRhaetic : Aust Cliff. [Vertebra.] 

 tritarsostin/us. Hawkins, v. Plesiosaurus hawkinsi. 

 trochanterius^ Owen. v. Cimoliosaurus trochanterius. 

 truncatus, Owen. v. Cimoliosaurus truncatus. 

 validus, Phillips, v. Cimoliosaurus trochanterius. 

 ivinspitensis, Seeley. v. Cimoliosaurus portlandicus. 

 Zetland i f Blake, v. Thaumatosaurus zetlandicus. 

 zetlandicus, Phillips, v. Thaumatosaurus zetlandicus. 

 ?sp. ? R. Owen, Rept. Cret. Form. (Pal. Soc, 1851), p. 66, pi. xx, 

 f. 7, 8. [ ? Cimoliosazirus.~\ 

 LOC. L. Greensand ; Shanklin. [Vertebra.] 

 ? sp., R. Owen, in F. Dixon, Geol. Sussex, 1850, p. 399, pi. xxxvii, 

 f. 1 15, and ed. 2, 1878, p. 426, same pi. and fig. [? Cimoliosauricsi\ 

 LOC. U. Chalk ; Houghton, Sussex. [Tooth.] 

 spp., J. F. Blake, in Tate and Blake, Yorkshire Lias, 1876, p. 252. 

 [Skeleton, ironstone of Eaton ; two coracoids, ironstone of 

 Skinnington ; elongated vertebra, Caftricornus beds, Salt- 

 burn ; dorsal vertebra, Jamesoni beds, Huntcliff.] 



PLESIOSUCHUS, Owen. v. Dacosaurus. 



inanseli (Hulke), Owen. v. Dacosaurus maximus. 



FXiEUROCCE&US, O. C. Marsh, Amer. Journ. Sci. [3] vol. xxxv, 



1888, p. 90. 

 valdensis. R. Lydekker, Geol. Mag. [3] vol. vi, 1889, p. 325. 

 'Teeth of the Hylaeosaur ?,' G. A. Mantell, Phil. Trans., 1841, 



p. 144, pi. vi, f. 9-1 1, and Petrifactions, 1851, p. 326, woodcut 



70, and Wonders of Geology, ed. 6, 1848, p. 438, woodcut 109; 



R. Owen, Rept. Weald, and Purb. Form., pt. iv (Pal. Soc, 



1858), p. 21, pi. viii, f. 6-9 (teeth), and Palaeontology, ed. 2, 



1861, p. 293. 

 ' Teeth of a peculiar form,' G. A. Mantell, Wonders of Geology, 



ed. 3, vol. i, 1839, p. 403, pi. iii, f. 4. 

 LOC. Wealden ; Sussex. [Teeth ; Brit. Mus.] 



PLEUSOSTERNUM, R. Owen, Rept. Weald, and Purb. Form., 

 pt. i (Pal. Soc, 1853), p. 2 {Pleurosternon) ; R. Lydekker, 

 Quart. Journ. Geol. Soc, vol. xlv, 1889, p. 513. 



MEGASTERNON, [J. E. Gray] Syn. Contents Brit. Mus., ed. 44, 

 1842, p. 108 (name only, preoccupied). 



Digerrhum, E. D. Cope, Trans. Amer. Phil. Soc, vol. xiv 

 (1870), p. 156. 

 bullocki (Owen), L. Riitimeyer, Neue Denkschr. schweiz. Nat. 

 Ges., vol. xxv, art. 2, 1873, p. 159 ; R. Lydekker and G. A. 

 Boulenger, Geol. Mag. [3] vol. iv, 1887, p. 271 ; W. Davies, 

 Geol. Mag. [3] vol. iv, 1887, p. 380; R. Lydekker, Quart. 

 Journ. Geol. Soc, vol. xlv, 1889, p. 514, woodcuts 3, 4, and 

 Cat. Foss. Rept. B. M ., pt. iii, 1889, p. 206, woodcuts 45, 46. 



