806 | ©" REPORTS ON THE STATE OF SCIENCE.—1913. 
ec. ae. ae 
(b) The Leatherback is a member of the Cryptodira, and allied to 
the other marine turtles. 
(c) The problem of the origin of the aberrant shell of the Leather- 
back seems to find its solution in the hypothesis that it is a secondary 
proliferation of the marginals and such other ‘ epithecal ’’ elements as 
were present in its thecophorous ancestors. 
LITERATURE. 
Baur, G. (1889 a). Die systematische Stellung von Dermochelys Blainv. in ‘ Anat. 
Anzeiger,’ vol. 9 (1889-90), p. 149-153, 180-191. 
—— (18896). Nachtragliche Bemerkungen iiber die systematische Stellung von 
Dermochelys Blainv., in * Biol. Centralblatt,’ vol. 9 (1889-1890), p. 618-619. 
—— (1890). On the classification of the Testudinata, in ‘ American Naturalist,’ 
vol. 24, p. 530-536. 
Van Bemmelen, J. F. (1896). Bemerkungen iiber den Schidelbau von Dermochelys 
coriacea, in ‘ Festschrift Gegenbaur,’ vol. 2, Leipzig, 1896, p. 279-286. 
Boulenger, G. A. (1888). Remarks on a note by Dr. G. Baur on the Pleurodiran 
Chelonians, in ‘ Ann. Mag. Nat. Hist.’ (6), vol. 2, p. 352-354. 
—— (1889), Catalogue of the Chelonians, Rhynchocephalians and Crocodiles in the 
British Museum, London. 
Burne, R. H. (1905), Notes on the muscular and visceral anatomy of the Leathery 
Turtle (Dermochelys coriacea), in ‘ Proc. Zool. Soc.,’ London, p. 291-324. 
Case, E. C. (1897). On the osteology and relationships of Protostega, in ‘ Journ. 
Morphol.,’ vol. 14, 1898, p. 21-58. 
—— (1898), T'oxochelys, in ‘ University Geol. Survey of Kansas,’ vol. 4, Paleont., 
Part I., p. 370-385. 
Dollo, L. (1901). Sur Vorigine de la Tortue Luth (Dermochelys coriacea), in ‘ Bull. 
Soc. Sc. méd. nat.,’ Bruxelles, p. 1-26. 
—— (1903). ochelone brabantica, Tortue marine nouvelle du Bruxellien (Eocéne 
moyen) de la Belgique (Sur l’évolution des Chéloniens marins), in ‘ Bulletin Acad. 
Belg.,’ 1903, No. 8, p. 792-850. 
Fraas, E. (1899). Proganochelys Quenstedtii Baur (Psammochelys Keuperiana Qu.), 
in ‘ Jahreshefte Ver. vaterl. Naturk.,’ Wiirttemberg, 1899, p. 401. 
—— (1913). Proterochersis, eine Pleurodire Schildkréte aus dem Keuper, ibid., 
1913, p. 13-30. 
Gadow, H. (1899). Orthogenetic Variation in the Shells of Chelonia, in ‘Willey’s 
Zoological Results,’ p. 207-222. 
(1901). Amphibia and Reptiles; Cambridge Natural History, vol. 8. London. 
Gegenbaur, C. (1898). Vergl. Anatomie d. Wirbelthiere, vol. 1. Leipzig. 
Hay, O. P. (1898). On Protostega, the systematic position of Dermochelys, and the 
morphogeny of the Chelonian carapace and plastron, in ‘ Amer. Natural.,’ vol. 32, 
p. 929-948. 
—— (1905). On the Group of Fossil Turtles, known as the Amphichelydia, in ‘ Bull. 
Amer. Mus. Nat. Hist.,’ vol. 21, p. 137-175. 
—— (1908). The Fossil Turtles of North America (Carnegie Institute, Public. No. 75), 
Washington. 
Hoffmann, C. K. (1890). Schildkréten, in Bronn’s ‘ Klassen und Ordnungen Thier- 
reich.,’ vol. 6, Abt. 3, 1. 
Jaekel, O. (1906). Placochelys placodonta aus der Obertrias des Bakony, in ‘ Result. 
wiss. Erforschung Balatonsee,’ vol. 1, Teil 1, palaont. Anhang, p. 1-91. 
—— (1914). Stegochelys, in ‘ Palaeontologische Zeitschrift,’ Organ der Palaeont. 
Gesellsch., herausgegeb. von Jaekel, vol. 1. 
Menger, W. (1914). Ueber die Ontogenie des Schildkrétenpanzers, in ‘ Zoolog. 
Jahrb., Anat.’ (not yet in print). 
Newman, H. H. (1906). The significance of scute and plate abnormalities in Chelonta, 
in ‘ Biolog. Bull.,’ vol. 10, p. 69-114. 
Nick, L. (1912). Das Kopfskelet von Dermochelys coriacea L., in ‘ Zool. Jahrb.,’ 
vol. 33, Anat., p. 1-238. 
Schmidt, W. J. (1910). Das Integument von Voeltzkowia mira Bttgr., in ‘ Z. wiss. 
Zool.,’ vol. 94, p. 605-720. 
