LIST OF WOODCUTS. xxiii 



PAGE 



237. Diagram of the Primitive Condition of the Kidney in an Elasmobranch 



Embryo. (After Balfour.) 303 



238 A. Diagram of the Arrangement of the Urinogenital Organs in an Adult 



Female Elasmobranch. (After Balfour.) 303 



238B. Diagram of the Arrangement of the Urinogenital Organs in an Adult 



Male Elasmobranch. (After Balfour.) 303 



239. The Entire Viscera of Siplwnops annulattis ( 9 ), in situ 305 



240. Diagram of the Urinogenital System of a Male (A) and Female (B) Uro- 



dele ; founded on a preparation of Triton tceniatus. (After J. "W. 

 Spengel.) 306 



241. Excretory Apparatus of Monitor indicus 308 



242. Male Urinogenital Apparatus of Heron (Ardea cincrea) 309 



243. Diagrammatic Longitudinal Section through the Kidney of a Mammal . . 310 



244. Male Urinogenital Apparatus -of the Sturgeon 312 



245. Female Urinogenital Apparatus of Protopterus annectens. (From the 



ventral side, natural size. ) (After H. Ay ers.) 313 



246. Diagram of a Portion of the Male Generative Apparatus of the Gymno- 



phiona 315 



247. Testis and Anterior End of Kidney of Hana esculenta. (Semidiagram- 



inatic.) 315 



248. Urinogenital Organs of a Female Rana esculenta = 317 



249. Female Urinogenital Apparatus of Lacerta muralis 318 



250. Male Urinogenital Organs of Anguisfragilis. (After F. Ley dig. ) . . . 319 



251. A, Male Urinogenital Organs of Orntihorhynch'ics paradoxus ; B, Female 



Urinogenital Organs of Echidna hystrix 321 



252. Female Generative Apparatus of Certain Marsupials. A, Didelphys 



dorsigera (juv.) ; B, Phalangista vulpina ; C, Phascolomys wombat. 

 (After A. Brass.) 323 



253. Various Forms of Uteri. A, B, C, D, diagrams showing the different 



stages in the fusion of the Mullerian ducts : A, uterus bicornis ; B, uterus 

 eimplex ; C, uterus duplex ; D, uterus bipartitus. E, female Urinogenital 

 apparatus of Hustelina, with embryos in the uterus ; F, ditto of 

 Hedgehog (Erinaceus) 324 



254. Section through a Portion of the Ovary of a Mammal, showing the Mode 



of Development of the Graafian Follicles 325 



255. Diagrammatic Section of the Testis of a Mammal 325 



256. Male Urinogenital Apparatus of the Hedgehog (Erinaceus) 326 



257. Semidiagrammatic Figure of the Human Penis. (A, transverse section ; 



B, side view ; C, from below. ) 329 



