Aves. 



-363- 



Case, E. C. : A mounted specimen of Dimetrodon incisivus Cope in 

 the üniversity of Michigan. (Amer. Journ. Sc. 1915. 40. 474—478. 

 6 Fig.) 



— A mounted skeleton of Edaphosaurus cruciger Cope in the geol. Coli. 



of the üniversity of Michigan. (Occas. Pap. Mus. Zool. Univ. Michigan, 



Ann. Arbor. 1918. No. 62. 8 p. 2 Taf.) 

 Twelfhofel, W. H. : A new locality and horizon for pennsylvanian (upper 



carboniferous) vertebrates. (Science. July 1914. 40. 26 — 27.) 

 Willis ton, S. W. : The Evolution of Vertebrae , and the Osteology of 



some American Permian Vertebrates. III. (Contr. from Walker Mus. 



1917. 2. No. 4. 75—112. 2 Taf. 19 Textfig.) 



Aves. 



Lambrecht, K. : Geschichte und Bibliographie der Paläoornithologie. 

 (Aquila. Budapest. 1916. 23. 209 ff.) 



— Die Ausbildung und Geschichte der europäischen Vogelwelt. (Aquila. 

 Budapest. 1917. 24. (1918.) 191—221.) 



Heil mann, G. : Fuglenes afstamning. (Dansk ornithologisk Foreningens 



Tidskrift. Kopenhagen 1916. 398 p. 215 Fig.) 

 Gregory, W. K.: Theories of the origin of birds. (Ann. New York Acad. 



Sei. 1916. 37. 31—38.) 

 Beebe, C. W. : The Tetrapteryx-st&ge in the ancestry of birds. (Zoologica. 



II. No. 2. 1915.) 



Steiner, H. : Das Problem der Diastataxie des Vogelflügels. (Jenaische 



Zeitschr. f. Naturwiss. 1919. 55. 221—496. 49 Fig. Taf. 9—11.) 

 Petronievics, B. and A. S. Woodward: The pectoral and pelvic 



arches of the British Museum specimen of Archaeopteryx. (Proceed. 



Zool. Soc. London. April 1917. 1—6. Taf. I.) 

 Wo od ward, A. S. : On the development from the matrix of further parts 



of the skeleton of Archaeopteryx. (Geol. Mag. 1917.) 

 Andrews, C. W. : An incomplete Sternum of a gigantic carinate bird 



from the (?) Eocene of Nigeria. (Proceed. Zool. Soc. ? 1916.) 

 Shufeldt, R. W. : On a restoration of the base of the cranium of 



Hesperornis regalis. (Bull. Amer. Palaeontolog. Dec. 1915. No. 25.) 



— Fossil birds found at Vero , Florida. (9th Ann. Rep. Florida State 

 Geol. Surv. 1917. 35—42. PI. 1—2.) 



Shufeldt, R. W. : Fossil birds in the Marsh collection of Yale Üni- 

 versity. (Transact. Connecticut Acad. Arts and Sc. 1915. 19. 1 — 110. 

 Taf. 1 — 15.) 



Matthew, W. D. and W. K. Gregory: The skeleton of Diatryma, a 

 gigantic bird from the lower Eocene of Wyoming. (Bull. Amer. Mus. 

 Nat. Hist. 1917. 37. 307-326. PI. 20—33.) 



