XIII 



PIIVLrM CHORD ATA 



tube, the vas drfrrcns or sperniiduct (r. d), wliieli ppens into the 

 terminal part of the corresponding ureter. A pair of vascular 

 eversible aqmlafor// men (p. p.), which when everted are seen to be 

 of cylindrical form witli a dilated and bifid apex, open into the 

 posterior part of the cloaca. 



In the female the oi-aries (Fig. <)7G, or.) are a pair of irregularly 

 oval bodies having their surfaces , _ ^ ^^ 



raised up into rounded elevations, /^ ^ ^ 



mso 



Fic. 'i"i. — >rale urinngeiiitMl organs of Ziacerta 

 Viridis. The ventral wall of the eloaca is 

 removed, the Viladder is turned to the animal's 

 right, and the peritoneal covering of the left 

 testis and epididymis is dissected awaj'. hi. 

 urinary bladder ; '<. Ig, fold of peritoneum sup- 

 porting epididymis ; clA anterior and <7.- pos- 

 terior divisions of the cloaca ; cp. epididymis ; 

 /.■. kidney ; vixo. mesorchium ; p copulatory 

 organs, of which the right is shown retracted 

 (/< ) and the left everted (?') ; r.m. retractor 

 muscle of latter ; /•. ridge separating anterior 

 and posterior divisions of cloaca ; ret. rectum ; 

 rrl'. its opening into the cloaca ; t. testis ; 

 u. g. urinogenital paiiilla and aperture ; r. d. 

 vas deferens. >(From Parker's Znotoniy.) 



Fig. 976. — Female urinogenital organs of 

 Iiacerta viridis. The ventral wall 

 of the cloaca, the in-inary bladder, the 

 posterior end of the left oviduct, and 

 the peritoneal investment of the left 

 ovary and oviduct are removed, h. Ig. 

 broad ligament ; c?.i anterior, and r/.- 

 posterior divisions of the cloaca ; L: 

 kidney ; //<». o. mesoarium ; od. left 

 oviduct ; od'. its peritoneal aperture ; 

 od". aperture of right oviduct into the 

 cloaca; ov. ovary; vr. 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-svall 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 lujamcnt (b, hj.), attaches the oviduct to the body-wall. 



