ALIMENTARY CANAL OF REPTILES. 



433 



292 



§ 75. Alimentary canal of Reptiles. — The cavity containing, as 

 in Fislies, the alimentary 

 canal, Avith the kidney s and 

 principal organs of gene- 

 ration, also lodges in Rep- 

 tiles, fig. 292, the heart, a, 

 b, c, and lungs, h, i. In 

 most the whole cavity is 

 lined by the peritoneum, 

 which is reflected upon the 

 several viscera. In the 

 transA'erse section of the 

 cavity, fig. 293, the thick 

 line diagrammatically 

 shows the peritoneum re- 

 flected from the vertehral 

 centrum upon the aortal 

 and caval trunks, h, the 

 sj)leen, b, and stomach, a, 

 whence it is continued to 

 form the omental fold, e, c : 

 from the ventral surface 

 the peritoneum is reflected 

 at one small part upon the 

 remains of the umbilical 

 vein, forming the so-called 

 ' falciform,' ff, and ' round,' 

 d, ligaments of the liver. 

 In the Crocodilia the peri- 

 toneum does not extend forward beyond the stomach and liver, 

 but is reflected upon the posterior (sacral) surface s93 



of both organs,' circumscribing a smaller ' abdo- 

 minal' cavity, and including fewer viscera, than in 

 IMammals. 



In female Keptiles, the serous membrane of 

 the abdomen is continuous with the mucous mem- 

 brane of the oviducts ; the subhexagonal or poly- 

 gonal flattened cells of its epithelium giving place 

 to the ciliated epithelial cells at the margin of the 

 oviducal aperture. In both male and female 

 Chelonia, the peritoneum is continued, as an in- iransvei 



Abdominal cavity and visCL-ra, Lrnco voknis. ccl. 



verse sectiou of 



fundibular canal, into the ' corpus cavernosum' ""' ^-Moniinai cavtv 



Lizard, ccxxxv. 



VOL. I. 



' ccxxxvi. voL ii. p. 336. 

 F F 



