106 THE PHYSIOLOGY OF REPRODUCTION 



(Spermophilus citillus)} Lataste ^ has described prooestrous 

 growth and congestion in the uterus of several Muridse, 

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

 charge from the original opening. Lataste has also described 

 desquamation of tlie uterine epithehum, but he appears to 

 regard this process as taking place independently of " heat." 

 More recently Konigstein ^ has recorded cyclical changes in 



Fig. 17. — Section through portion of prooestrous uterine mucosa of 

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

 Roy. Soc. Medicine.) 



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

 prooestrous desquamation of the uterine epithehum, followed 

 by recuperation. The degenerative changes are accompanied 



' Rejsek, " Anheftung (Implantation) des Saugethieres an die Uteruswand, 

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

 1904. 



' Lataste, Recherehes de Zoithique sur Us Mammifires de I'ordre des Rongeurs, 

 Bordeaux, 1887. 



^ Konigstein, " Die Veranderungen der Genitalschleimhaut wahrend der 

 Graviditat und Brunst bei einigen Nagern,'" Pfliiger's Arch., vol. oxix., 1907. 



