﻿52 
  

  

  INTRODUCTION. 
  

  

  And 
  finally, 
  attention 
  must 
  be 
  drawn 
  to 
  a 
  pro- 
  

   blematic 
  organ, 
  peculiar 
  to 
  the 
  males 
  of 
  the 
  genus 
  

   Bufo, 
  termed 
  by 
  Spengel 
  " 
  Bidder's 
  organ," 
  situated 
  

  

  Fig. 
  22. 
  

  

  T-5 
  

  

  ecu 
  

  

  ca 
  

  

  '^^p^ 
  

  

  vs. 
  

  

  ecu 
  

  

  C 
  

  

  Te, 
  

  

  

  A 
  

  

  B 
  

  

  \i 
  IV 
  

  

  E 
  

  

  Right 
  urogenital 
  apparatus 
  (ventral 
  view, 
  tbe 
  testis 
  shifted 
  to 
  

   the 
  side) 
  of 
  — 
  A. 
  Discoglossus 
  pictiis. 
  b. 
  Bombmator 
  pachypiis. 
  

   c. 
  Alytes 
  ohstetricans. 
  d. 
  Bufo 
  viridis. 
  E. 
  JRana 
  temporaria. 
  

  

  b. 
  Bidder's 
  organ. 
  

   ca. 
  Corpora 
  adiposa. 
  

   m 
  Miillenan 
  duct. 
  

  

  r. 
  Kidney. 
  

  

  t. 
  Testis. 
  

  

  u. 
  Ureter. 
  

   ve. 
  Yas 
  efferens. 
  

   vs. 
  Yesicula 
  seminis. 
  

  

  