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THE AMERICAN NA TURALIST. [VOb,“x2ox Te 
The Problems of Comparative Osteology. Sczence, Vol. 16, No. 407, 
1890, pp. 281-282. 
Das Varlieren der Eidechsen-Gattung Tropidurus auf den Gala- 
pagos Inseln und Bemerkungen uber den Ursprung der Insel- 
gruppe. Szol. Centralol., Bd. 10, Nos. 15 und 16, 1890, pp. 475- 
483. 
The Very Peculiar Tortoise, Carettochelys Ramsay, from New Guinea. 
Science, Vol. 17, No: 426, Apr. 3 root, p. roo. 
American Box-Tortoises. Sczence, Vol. 17, No. 426, Apr. 3, 1891, 
pp. 190-191. 
The Horned Saurians of the Laramie Formation. Sczence, Vol. 17, 
No. 428, Apr. 17, 1891, pp. 216-217. 
The Lower Jaw of Sphenodon. Am. Naturalist, Vol. 25, May, 1891, 
pp. 489-490. 
Notes on the Trionychian Genus Pelochelys. Anu. Mag. Nat. Hist, 
(6) Vol. 7, May, 1891, pp. 445-446. 
Remarks on the Reptiles generally called Dinosauria. Am. Natural- 
7st, Vol. 25, May, 1891, pp. 434-454. 
On the Origin of the Galapagos Islands. Am. Naturalist, Vol. 25, 
March and April, 1891, pp. 217-229, 307-326. 
On the Relations of Carettochelys, Ramsay. Am. Naturalist, Vol. 25, 
July, 1891, pp. 631-639, Pls. XIV-XVI. . 
On Intercalation of Vertebra. /ourn. Morph., Vol. 4, No. 3, 1891, 
Pp: 331-336. 
The Pelvis of the Testudinata, with Notes on the Evolution of the 
Pelvis in General. Journ. Morph., Vol. 4, No. 3, 1891, pp. 345—- 
359, 13 digs. 
Notes on Some Little-known American Fossil Tortoises. Proceed. 
Acad. Nat. Sct. Phil., 1891, pp. 411-430. 
[Dr. Baur’s Trip to the Galapagos Islands.] Am. Waturalist, Vol. 25, 
Oct. 1891, pp. 902-907. 
The Galapagos Islands. Proceed. Am. Antiguar. Soc., Oct. 21, 
1891, pp. 3-8. 
Das Variieren der Eidechsen-Gattung Tropidurus auf den Galapagos- 
Inseln. Festschr. 2. 70. Geburtstage R. Leuckarts. Leipzig, 1892, 
Wilhelm Engelmann, pp. 259-277. 
Professor Alexander Agassiz on the Origin of the Fauna and Flora of 
the Galapagos Islands. Sczence, Vol. 19, No. 477, March 25, 1892, 
B. 2 76: 
Der Carpus der Schildkréten. Azat. Anz., Jahrg. 7, 1892, Nos. 7 
und 8, pp. 206-211, 4 Figs. 
On the Taxonomy of the Genus Emys, C. Duméril. Proc. Am. Phil. 
Soc., Vol. 30, 1892, pp. 40-44. 
Addition to the Note on the Taxonomy of the Genus Emys C. Du- 
ménl. Proc. Am. Phil. Soc, Vol. 30,1392, p.. 245: 
