344 THE URTNO-GENITAL SYSTEM, THE ADRENALS, ETC. 



O.T 



B. The female reproductive organs. 

 The position of these organs has already been given (p. 335)- 



I. The ovaries. 



a. General description. 



Fi g- 22 4- Each sac-like ovary (Fig-. 



224) is subdivided by thin- 

 walled septa into numerous 

 complete chambers, to the 

 inner walls of which the 

 ova are attached. The 

 walls of adjacent sacs are 

 intimately attached to each 

 other, and the subdivision 

 corresponds with, the ex- 

 ternal lobulated appearance 

 of the organ. According 

 to Spengel the number of 

 lobules is about fifteen 

 (Rathke nine to thirteen, 

 Brandt nine). Whether 

 this segmentation of the 

 ovary corresponds with the 

 segmentation of the body 

 has not been determined 

 (Spengel). No part corre- 

 sponding with Bidder's 

 organ has been found in 

 Eana esculenla. 



During the breeding 

 >f the Hght season the ovaries undergo 

 an extraordinary increase in 



< 



The female reproductive organs; the ovary o 

 side has been removed. 



.V K idney. 



, <>. T. Opening of the oviduct into pleuro-peritoneal cavity. S1ZC SO 3S to OCCUpy the 

 (ir Oviduct. 

 Ova Ovai-y. 



P Opening of oviduct into the cloaca. 

 S. .S'l Opening* of tin- ureters. 

 Ut Dilated hinder portion of the oviduct, 

 t Gr<Kive in which ureters lie. 



Fold in groove separating the openingx of the ureters. 



greater part of the body- 

 cavity and to displace the 

 other viscera. The ovaries 

 are entirely surrounded by 

 peritoneum. 



b. Minute structure. [The layer of peritoneum covering the 

 ovary possesses cilia (Thiry), the ciliated cells being arranged in 

 isolated patches (Sohweigger-Seidel, Waldeyer) on the ventral surface 

 of the organ, and on the mesovarium ; these patches are some- 



