138 THE AMERICAN NATURALIST. 
'99 SMITH, G. E. Further Observations on the Anatomy of the Brain in 
the Monotremata. Journ. Anat. Phys. Vol. xiii, N.S., pp. 309- 
342. 
'97 WILSON, J. T., AND HILL, J. P. Observations on the Development 
and Succession of the Teeth in Perameles ; together with a Contri- 
bution to the Discussion of the Homologies of the Teeth in Marsu- 
pial Animals. Quart. Journ. Micr. Sci. Vol. xxxix, pp. 427-588. 
'97 ZIEHEN, T. Das Centralnervensystem der Monotremen und Marsu- 
pialier. 1. Theil: Makroscopische Anatomie. Zoologische For- 
schungsreisen in Australien und dem Malayischen Archipel. Bd. 
iii, Lief. 1, S. 1-187. . Jena. 
For references to papers of Róse, Leche, Kükenthal, and others, on the 
dentition of the Marsupialia, see Wilson and Hill ('97, p. 582). 
For references to papers of Owen, Caldwell, Selenka, and Semon, on the 
marsupial allantois, see Hill ('97, p. 438). 
