586 



ANATOMY OF VERTEBRATES. 



the left. In the Lacerta hilineata 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- 

 ^^^ ture ovisacs appeared as 



flattened discs overlapping 

 each other. The duplica- 

 ture of peritoneum which 

 connects the oviduct to the 

 side of the vertebrse is con- 

 tinued beyond the canal, 

 and terminates in afree edge. 

 In the ovoviviparous Lizard 

 (^Lacerta \_Zootoca\ muralis^ 

 the part of the oviduct in 

 which embryonal develope- 

 ment proceeds is very ex- 

 pansile, as in the Vipier ; 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 jiart of 

 the tube at d, the uterine 

 jiart at e, the terminal part 

 at f: the peritoneal fold, 

 attaching the oviduct to the 

 ovary and to the spine, is 

 marked h, the rectum g, 

 and the cloaca h. 



In Chelonia the ovaries 

 are sjanmetrically disposed, 

 and placed far bade in the 

 abdomen. The female or- 

 gans of the Turtle ( Chcloiic 

 midas^, in the quiescent 

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

 folded sul)stancc, thickly studded with innumerable ovisacs, like 

 white S])ecks : cacli ovary is attached by a peritoneal fold, ' meso- 

 nrium,'' to the sides of vertebrav, lietwccn the rectum and the 



;ins iiniiregiiaterl, VipiT. 



