586 



ANATOMY OF VERTEBRATES. 



the left. In the Lacerta bilineata each ovary shows about a 

 dozen visible ovisacs : the oviducts are plicated throughout their 

 course. In Agama atra there are seven or eight equally developed 

 ovisacs in each ovary. In an Iguana the left ovary exceeded the 



right in size, and the imma- 

 390 ture ovisacs appeared as 



flattened discs overlapping 

 each other. The duplica- 

 tive of peritoneum which 

 connects the oviduct to the 

 side of the vertebra? is con- 

 tinued beyond the canal, 

 and terminates in a free edge. 

 In the ovoviviparous Lizard 

 {Lacerta \_Zooiocct\ muralis) 

 the part of the oviduct in 

 which embryonal develope- 

 nient proceeds is very ex- 

 pansile, as in the Viper ; in 

 the specimen figured, fig. 

 397, the right oviduct con- 

 tained three ova, ib. e, the 

 left two ova: the ovaria are 

 shown at a, the abdominal 

 aperture of the left oviduct 

 at c, the fallopian part of 

 the tube at d, the uterine 

 part at e, the terminal part 

 at f: the peritoneal fold, 

 attaching the oviduct to the 

 ovary and to the spine, is 

 marked b, the rectum g, 

 and the cloaca h. 



In Chelonia the ovaries 

 are symmetrically disposed, 

 and placed far back in the 

 abdomen. The female or- 

 gans of the Turtle ( Chelone 

 midas), in the quiescent 

 state, show the ovaries in the form of a broad, flattened, variously 

 folded substance, thickly studded with innumerable ovisacs, like 

 white specks : each ovary is attached by a peritoneal fold, ' meso- 

 arium,' to the sides of vertebra?, between the rectum and the 



■'■*V. 



Female organs impregnated, Viper, cccviii. 



