106 THE PHYSIOLOGY OF REPRODUCTION 



(Spermophilus citillus). 1 Lataste 2 has described prooestrous 

 growth and congestion in the uterus of several Mnridae, 

 and this is stated to be followed by a sanguineous dis- 

 charge from the original opening. Lataste has also described 

 desquamation of the uterine epithelium, but he appears to 

 regard this process as taking place independently of " heat/' 

 More recently Konigstein 3 has recorded cyclical changes in 



FIG. 17. Section through portion of prooestrous uterine mucosa of 

 rabbit showing glandular activity. (From Blair Bell, in Proc. 

 Roy. Soc. Medicine.) 



several Rodents (rat, guinea-pig, &c.), and has described 

 prooestrous desquamation of the uterine epithelium, followed 

 by recuperation. The degenerative changes are accompanied 



1 Eejsek, " Anheftung( Implantation) des Saugethieres an die Uteruswand, 

 insbesondere des Eies von Spermophilus citillus," Arch. f. Mikr. Anat., vol. Ixiii., 

 1904. 



2 Lataste, Recherches de Zoethique sur Us Mammiferes de I'ordre des Ronycurs, 

 Bordeaux, 1887. 



3 Konigstein, '-Die Veranderungen der Genitalschleimhaut wahrend der 

 Graviditat und Brunst bei einigen Nagern," Pjlugers Arch., vol. cxix., 1907. 



