﻿VISCERA. 
  53 
  

  

  between 
  the 
  testicle 
  and 
  the 
  adipose 
  bodies. 
  This 
  

   has 
  been 
  considered 
  by 
  some 
  anatomists 
  as 
  a 
  rudi- 
  

   mentary 
  ovary, 
  which 
  it 
  resembles 
  in 
  the 
  ova-like 
  

   nature 
  of 
  its 
  contents. 
  There 
  is, 
  however, 
  no 
  ground 
  

   for 
  regarding 
  male 
  toads 
  as 
  in 
  any 
  way 
  normally 
  

   hermaphrodite, 
  for 
  Spengel 
  has 
  actually 
  observed 
  a 
  

   true 
  hermaphrodite 
  specimen 
  of 
  the 
  common 
  toad, 
  in 
  

   which 
  the 
  problematic 
  organ 
  was 
  developed 
  in 
  addition 
  

   to 
  the 
  ovary, 
  and 
  that 
  author 
  therefore 
  regards 
  it 
  as 
  a 
  

   division 
  of 
  the 
  testicle, 
  endorsing 
  the 
  view 
  of 
  Bidder, 
  

   its 
  discoverer. 
  

  

  Rudimentary 
  oviducts, 
  the 
  Miillerian 
  ducts, 
  occur 
  

   in 
  the 
  males 
  ; 
  most 
  developed 
  in 
  Alytes, 
  where, 
  as 
  

   we 
  have 
  seen 
  above, 
  they 
  are 
  functional, 
  viz. 
  act 
  as 
  

   seminal 
  ducts, 
  and 
  in 
  Biijf^o 
  ; 
  absent 
  in 
  the 
  Pelobatidx 
  

   and 
  Hylidse. 
  

  

  The 
  followiug 
  comparison 
  is 
  instituted 
  on 
  specimeus 
  

   examined 
  during 
  the 
  breeding 
  period 
  : 
  

  

  In 
  Biscoglossus 
  the 
  testes 
  are 
  remarkably 
  large, 
  

   elongate, 
  oval, 
  ivory-white, 
  longitudinally 
  striated, 
  

   measuring 
  two-thirds 
  to 
  five-sixths 
  the 
  length 
  of 
  the 
  

   kidneys. 
  Contrary 
  to 
  what 
  exist 
  in 
  all 
  other 
  Ecau- 
  

   data, 
  there 
  is 
  but 
  oue 
  vas 
  eff 
  evens, 
  of 
  large 
  calibre, 
  

   which 
  does 
  not 
  open 
  into 
  the 
  kidney, 
  but 
  is 
  continued 
  

   uninterruptedly 
  into 
  the 
  seminal 
  duct, 
  which 
  extends 
  

   up 
  to 
  the 
  front 
  extremity 
  of 
  the 
  kidney, 
  terminating 
  

   in 
  a 
  short 
  blind 
  process. 
  The 
  vesicula 
  seminis 
  is 
  very 
  

   large, 
  and 
  extends 
  high 
  up 
  the 
  side 
  of 
  the 
  kidney. 
  

  

  In 
  Bomhinator 
  ijcwliypus 
  the 
  testes 
  are 
  yellow, 
  un- 
  

   pigmented, 
  twice 
  to 
  twice 
  and 
  a 
  half 
  as 
  long 
  as 
  broad, 
  

   slightly 
  flattened 
  and 
  rounded 
  at 
  both 
  ends, 
  nearly 
  

   half 
  as 
  long 
  as 
  the 
  kidneys. 
  The 
  vasa 
  efferentia 
  open 
  

   into 
  a 
  canal 
  along 
  the 
  inner 
  edge 
  of 
  the 
  kidney. 
  This 
  

   canal 
  communicates 
  with 
  the 
  seminal 
  duct 
  at 
  the 
  

   anterior 
  extremity 
  of 
  the 
  kidney, 
  beyond 
  wdiich 
  the 
  

   duct 
  extends 
  forwards 
  as 
  a 
  blind 
  process. 
  A 
  vesicula 
  

   seminis 
  is 
  absent. 
  B. 
  igneus 
  differs 
  in 
  having 
  the 
  

   testicles 
  more 
  or 
  less 
  pigmented, 
  sometimes 
  wholly 
  

   black. 
  Thev 
  measure 
  two-fifths 
  to 
  one-half 
  the 
  length 
  

  

  