486 Bulletin American Museum of Natural History. [Vol. XXVII, 



1900.1. Ueber den Schadel der Monotremen. Zool. A7iz., Bd. 23, 



no. 622, pp. 449-461. 



1900.2. Further results of an investigation of the Monotreme skull. 



Proc. Kon. Alcad. v. Wetensch. te Amsterdam; June 30, 1900, 

 pp. 130-132. 



1901.1. — — - Third note concerning certain details of the Monotreme 

 skull. Proc. Kon. Akad. v. Wetensch te Amsterdam, Dec. 29, 

 1900, pp. 405-407. 



1901.2. Der Schadelbau der INIonotremen. Semons Zoolog. For- 



schungsreisen, iii. Bd., Monotremen und INIarsiipialier, pp. 729- 

 798, Taf. xxx-xxxii. 



1907. Bresslau. Entwickelung des IVIammarapparates der Monotremen. 

 Semons Zool. Forschunr/sreisen, Bd. iv, Lief. 5. 



1898. Broom, R. A contribution to the Comparative Anatomy of the 



Mammalian Organ of Jacobson. Vide supra (p. 477). 



1899. On the Development and Morphology of the Marsupial 



Shoulder Girdle. J^ide supra (p. 480). 



Shoulder girdle of Monotremes. 



1906.1. On some Little-known Bones of the Mammalian Skull. 



Vide supra (p. 477). 



Dumb-bell bone of Ornithorhynchus. 



1825. CuviER, G. Recherches sur les Ossemens fossiles. 3'^"^^ ed., 



tome V, pte. 1. 



Excellent figures of the skeleton of Echidna, pi. xiii, of Ornithorhynchus, 

 pi. xiv. 



1872. Darwin, C. The Origin of Species. 6th edition. 

 Origin of lactation, p. 322. 



1901. Denker, a. Zur Anatomic des Gehororganes der Monotremata. 



Vide supra (p. 484). 

 1879. DoRAN, H. G. The INIammalian Ossicula Auditus. Vide supra 



(p. 477). 

 1901. Eggeling, H. Ueber die Stellung der Milchdriisen zu den ubrigen 



Hautdriisen. II. Mitthelung: Die Entwickelung der Mam- 



mardriisen . . . . der Monotremen. Semons Zool. Forschungs- 



reisen, Bd. iv, pp. 173-204. 

 1901. Emery, C. Hand- und Fussskelet von Echidna hystrix. Semons 



Zoolog. Forschungsreisen, Bd. iii, Monotremen und Marsupialier, 



pp. 663-676. 

 1885. Flower, W. H. Op. cif. snpra (\). 477). 



