CHELONIA — RHYNCHOCEPHALIA. Rept 31 
Archclon ischyros , Wiel. (foss.). On the structure of the carapace, 
Wieland, Amer. J. Sci. (4) xv, p. 211, fig. 
PLESIOSAURIA. 
S. W. Williston, Field Mus. Geol. ii, pp. 1-77, figg., pis. i-xxix, catalogues 
the Plesiosaurians of North America, and gives full descriptions and 
figures of Dolichorhynchops osborni , Willist., Cimoliosaurus snowi , 
Willist., and Polycotylus latipinnis , Cope. 
S. W. Williston, Science (2) xvii, p. 980, remarks on the structure of the 
Plesiosaurian skull and gives a definition of the family Pliosauridce. 
Plesiosaurus costatus , Ow., and bibractensis , Sauv. Notes by Sauv AGE, 
Bull. Soc. Autun xvi, pp. 310 & 311. 
Polyptychodon interruptus , Ow. Note by Sauv age, t. c. p. 321. 
Pliosaurus (?) phosphaticus , sp. n., De Stefano, Boll. Soc. geol. ltal. xxii, 
p. 66, Lower Eocene, Tunisia. 
Brachauchenius , g. n. ( Pliosaurid .) for B. lucasi , sp. n., Williston, Field 
Mus. Geol. ii, p. 57, pis. xxiv & xxv, Cretaceous of Kansas. 
Trinacomerum anonymum , sp. n., Williston, t. c. p. 66, pi. xxviii, 
Cretaceous of Kansas. 
Polycotylus ischiadicus , sp. n., Williston, t. c. p. 72, pis, x & xxvi, 
Cretaceous of Kansas. 
L. Vaillant, C.R. Ac. Sci. cxxxvi, p. 1286, remarks on the scales and 
plastron of Mesosaurus tenuidens , which he regards as indicating 
affinities with both the Stegocephalia and the Ophidia. 
THECODONTIA. 
Remarks by BoUlengeR, Phil. Trans, cxcvi, b, p. 187. 
Ornithosuchus woodwardi, E. T. Newton. On remains of adult specimens, 
Boulenger, t. c. p. 182, figg., pis. xiv & xv. 
Proterosuchus , g. n., apparently allied to Ornithosuchus , for P. fergusi } 
sp. n., Broom, Ann. S. African Mus. iv, p. 159, pi. xix, Trias of 
Tarkastad, S. Africa. 
Actiosaurus gaudryi , Sauv. Remarks by SAuvage, Bull. Soc. Autun xvi, 
p. 316. 
Rileya bristolensis, g. n., sp. n., for two vertebrae and a humerus from the 
Trias of Bristol, F. v. Huene, Pal. Abh. (2) vi, p. 62, figg. 
PELYCOSAURIA. 
On the characters and affinities of the American forms, E. C. Case, Amer. 
Natural, xxxvii, pp. 85-102, figg. 
On the osteology of Embolophorus dollovianus , Cope, with a restoration of 
the whole skeleton, E. C. Case, J. Geol. xi, p. 1, figg. 
RHYNCHOCEPHALIA. 
On the development of Sphenodon punctatus , Gray, Schauinsland, 
Zoologica xvi, pp. 1-4, 41-57, pis. i-xi, pp. 134-143, pis. xlv-xlix, 
pp. 162-167, pis. lv & lvi. 
G. E. Smith, Tr. Linn. Soc. London (2) viii, pp. 455-464, figg., has remarks 
on the brain of Sphenodon. 
Hyperodapedon gordoni, Huxley (foss.). On the palate, Boulenger, Phil. 
Trans, cxcvi, b, p. 175, fig., pi. xi. 
1903. [Vol. xl.] 
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