2i8 THE BIOLOGY OF THE FROG chap. 



After the feeding period begins there is a rapid storage of a 

 yellowish fat in the cells, which become greatly increased in 

 size. 



The development of the fat body is closely connected 

 with that of the gonads. Both, in fact, arise from the 

 differentiation of the genital ridge, the anterior portion of 

 which forms the fat body, the posterior portion the ovary or 

 testis. 



REFERENCES 



Boettcher, A. Ueber den Bau unci die Quellungsfahigkeit der 

 Froscheileiter. Virchow's Archiv, Bd. 37, 1866. 



Bouin, M. Histogenese de la Glande Genitale Femelle chez Rana 

 temporaria. Arch, de Biol., T. 17, 1901. 



Funke, R. Ueber die Schwankungen des Fettgehaltes der Fettfiih- 

 renden Organe im Kreislauf des Jahres. Denkskr. Ac. Wiss. Math.- 

 nat. CI., Bd. 68, 1900, Wien, 



Giglio-Tos, E. Sur les corps gras des Amphibies. Arch. Ital. d. 

 Biol, T. 25, 1896. 



Ploetz, A. J. DieVorgange in den Froschhoden unter dem Einfluss 

 der Jahreszeit. Arch. Anat. u. Phys., phys. Abth. Suppl. Bd., 1890. 



Tarchanoff, J. R. Zur Physiologie des Geschlechtapparatus des 

 Frosches. Arch. ges. Phys., Bd. 40, 1887. 



