THE EMBRYOLOGY OF THE OPOSSUM 223 



OWEN, R. 1841 Account of a Thylacinus, the great dog-headed opossum, one 

 of the rarest and largest of the marsupiate family of animals. Rep. 

 Brit. Assoc., pt. 2, pp. 70-71. 



1843 On the rudimental marsupial bones of Thylacinus. Proc. 



Zool. Soc., vol. 11, pp. 148-149. 



1847 Note on Meig's memoir on the reproduction of the opossum. 



Ann. Mag. Nat. Hist., vol. 20, pp. 324-328. 



1848 On the generation of Didelphys. Proc. Am. Acad. Arts and 



Sci., vol. 1, pp. 178-179. 



PAINTER, THEOPHILTJS SCHICKEL 1922 Studies in mammalian spermatogenesis. 

 I. The spermatogenesis of the opossum (Didelphys virginiana). J. 

 Exp. Zool., vol. 35, pp. 13-45. 



1924 Studies in mammalian spermatogenesis. III. The fate of the 



chromatin-nucleolus in the opossum. J. Exp. Zool., vol. 39, pp. 197-227. 



PALMER, W. E. 1913 Lower jaw and ear ossicles of foetal Perameles. Anat. 



Anz., Bd. 43, S. 510-515. 

 PAPPENHEIM, S. 1847 Notices pr41iminaire sur 1'anatomie du Saurigue femelle 



(Didelphys virginiana) . Compt. Eend. Acad. Sci., Paris, vol. 24, 



pp. 186-190. 

 PARKER, KATHERINE M. 1917 The development of the hypophysis cerebri, pre- 



oral gut, and related structures in the Marsupialia. J. Anat., vol. 51, 



pp. 181-249. 

 PATTERSON, J. T., AND CARL G. HARTMAN 1917 A polyembryonic blastocyst in 



the opossum. Anat. Bee., vol. 13, pp. 87-95. 

 PETER, K. 1904 Normentafel zur Entwicklungsgeschichte der Zauneidechse 



(Lacerta agilis). Normentafeln z. Entw. d. Wirbelthiere, Hefte 4, 



S. 1-165. Gustav Fischer, Jena. 

 PETERS, W. 1868 Ueber die bei Beutelthieren in Entwicklungs zustande vorkom- 



mende Verbindung des Os tympanicum mit dem Unterkiefer als einem 



neuen, Beweis fur die Uebereinstimmung dieses Knochens mit dem Os 



quadratum der iibrigen Wirbelthiereclassen. Ann. Mag. Nat. Hist., 



vol. 1, pp. 388-390. 

 POTTLTON, E. B. 1883 The tongue of Perameles nasuta with some suggestions 



as to the origin of taste bulbs. Quart. J. Micr. Sci., n.s., vol. 23, 



pp. 69-86. 



1883 On the tongues of marsupials Proc. Zool. Soc., part IV, 



pp. 599-627. 



1884 Structures connected with the ovarian ovum of Marsupialia and 



Monotremata. Quart. J. Micro. Sci., vol. 93, pp. 118-128. 



PROFE, OSCAR 1898 Beitrage zur Ontogenie und Phylogenie der Mammar- 



organe. Anat. Hefte, Bd. 11, S. 247-286. 

 BBNGOER, J. R. 1830 Ueber die Fortpflanzung der Beutelthiere. Fror. Not., 



vol. 27, pp. 49-51. 

 RETZIUS, G. 1898 Zur ausseren Morphologic des Reichhirns der Saugetiere und 



des Menschen. Biol. Unters., N.F., Bd. 8, 8. 23-48. 



1906 Die Spermien der Marsupialier. Biol. Unters., N.F., Bd. 13, 



8. 77-86. 



1909 Die Spermien von Didelphys. Biol. Unters., N.F., Bd. 14, 



8. 123-126. 



