204 



EEPTILIA. 



kidney (primordial kidney and Wolffian duct), which in the Amphibia 

 still functions as a urinary organ, is here transformed into the 

 efferent apparatus of the testis (epididymis and vas deferens), and 

 in the female sex vanishes or rarely persists as a rudiment (Rosen- 

 muller's organ, canal of Gartner), while in the female the Miilleiian 



FIB. 634. Urogenital apparatus of Lacerta agilig (after C. Heider). a, of the male, 

 kidney ; H, testis ; Nh, epididymis ; Vd, vas deferens ; P, remains of the primordial 

 kidney (Wolffian body); T, remains of the Miillerian duct; Pe, penis; SP, pores of 

 femoral glands ; SD, femoral glands. b, Of the female. Hb, urinary bladder ; Md, 

 rectum (cut) ; Cl, cloaca OP, ovary ; T, Mullerian duct developed into oviduct. 



duct becomes the oviduct. The oviducts as well as the vasa deferentia 

 open separately into the cloaca. The oviducts begin with a wide 

 peritoneal ostium, have a sinuous course, and secrete the calcareous 

 and usually membranous egg shells. The eggs in many cases remain 

 a long time in the terminal part of the oviduct (which may then 



