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- 

 mailer's organ, canal of Gartner}, while in the female the Miillerian 



FIG. 63-i. Urogenital apparatus of Laceria agilis (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. 5, Of the female. Hb, urinary bladder; Md, 

 rectum (cut) ; Cl, cloaca Ov, ovary ; T, Miillerian 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 



