PHYLUM CHORDATA 



333 



tube, the vas deferent or spermiduct (v. d.), which opens into the 

 terminal part of the corresponding ureter. A pair of vascular 

 eversible copulatory sacs (p. p.), which when everted are seen to be 

 of cylin<j/cal form with a dilated and bifid apex, open into the 

 posterior part of the cloaca. 



In the female the ovaries (Fig. 976, ov.) are a pair of irregularly 

 oval bodies having, their surfaces 

 raised up into rounded elevations, 



Fir,. 975. Male urinogenital organs of Lacerta 

 viridis. The ventral wall of the cloaca is 

 removed, the bladder is turned to the animal's 

 right, and the peritoneal covering of the left 

 testis and epididymis is dissected away. bl. 

 urinary bladder ; l>. lg, fold of peritoneum sup- 

 porting epididymis ; c/. 1 anterior and cl.2 pos- 

 terior divisions of the cloaca ; cp. epididymis ; 

 /,-. kidney ; mso. mesorchium ; p copulatory 

 organs, of which the right is shown retracted 

 (//) and the left everted (p) ; r.m. retractor 

 muscle of latter ; r. ridge separating anterior 

 and posterior divisions of cloaca ; ret. rectum ; 

 ret', its opening into the cloaca ; t. testis ; 

 u, g. urinogenital papilla and aperture ; v. d. 

 vas deferens. ;(From Parker's Zootomy.) 



od 



FIG. 976. Female urinogenital organs of 

 Lacerta viridis. The ventral wall 

 of the cloaca, the urinary bladder, the 

 posterior end of the left oviduct, and 

 the peritoneal investment of the left 

 ovary and oviduct are removed, b. Ig. 

 broad ligament; d. 1 anterior, and c-L 2 

 posterior divisions of the cloaca ; k. 

 kidney ; ms. o. mesoaiiutn ; od. left 

 oviduct ; od'. its peritoneal aperture ; 

 od". aperture of right oviduct into the 

 cloaca ; ov. ovary ; ur. aperture of 

 ureter. (From Parker's Zootomy.) 



marking the position of the ova. They are situated a little further 

 back than the testes, and each is attached to the body- wall by a 

 fold of the peritoneum, the mesoarium (ms. o.). The oviducts (od.) 

 are thin-walled, wide, plaited tubes which open in front into the 

 cavity of the body (od'.), while behind they communicate with the 

 posterior part of the cloaca, their opening (od".) being distinct from, 

 and a little in front of, those of the ureters. A fold of the peritoneum, 

 the broad ligament (b. lg.) } attaches the oviduct to the body-wall. 



