﻿2S 
  

  

  H. 
  S. 
  Pratt, 
  

  

  tozoa 
  stored 
  in 
  the 
  fundus 
  towards 
  the 
  ovarial 
  sacs. 
  The 
  passage 
  

   of 
  the 
  egg, 
  on 
  the 
  other 
  hancl, 
  frorn 
  the 
  ovary 
  into 
  the 
  fundus 
  would 
  

   not 
  he 
  hindered. 
  

  

  The 
  ovaries. 
  

  

  The 
  ovaries 
  of 
  Melophagus 
  have 
  mueh 
  about 
  them 
  which 
  is 
  

   peculiar 
  and 
  have 
  in 
  consequence 
  attracted 
  the 
  attention 
  of 
  entomoto- 
  

   mists 
  ever 
  since 
  the 
  time 
  of 
  Keaumur. 
  On 
  account 
  of 
  the 
  difficulties 
  

   attending 
  a 
  successful 
  dissection 
  of 
  them, 
  however, 
  it 
  was 
  Leuckart 
  

   who 
  first 
  correctly 
  described 
  them. 
  All 
  of 
  the 
  eaiiier 
  investigators, 
  

   often 
  misled 
  by 
  a 
  curious 
  desire 
  to 
  homologise 
  them 
  with 
  the 
  human 
  

   ovaries, 
  to 
  which 
  they 
  bear 
  a 
  certain 
  superficial 
  resemblance, 
  described 
  

   the 
  ovary 
  of 
  Melophagus 
  as 
  containiug 
  but 
  a 
  Single 
  ovariole 
  which 
  

   contained 
  but 
  a 
  Single 
  ovum. 
  And 
  this 
  false 
  notion 
  still 
  largely 
  

   prevails 
  and 
  is 
  propagated 
  by 
  certain 
  illustrations 
  which 
  appear 
  in 
  

   some 
  of 
  the 
  best 
  text-books. 
  Fig. 
  495 
  in 
  Claus' 
  »Lehrbuch 
  der 
  Zoo- 
  

   logie« 
  and 
  Fig. 
  160 
  in 
  Gegenbaur's 
  »Comparative 
  Anatomy« 
  (English 
  

   translation) 
  are 
  taken 
  from 
  Leuckart 
  1 
  s 
  Fig. 
  1 
  (1. 
  c.) 
  and 
  incorrectly 
  

   described, 
  conveying 
  the 
  notion 
  above 
  mentioned. 
  

  

  The 
  ovary 
  of 
  our 
  insect 
  appears 
  as 
  an 
  ovoid 
  body 
  of 
  variable 
  

   size 
  (PI. 
  II, 
  Fig. 
  2 
  ov). 
  In 
  a 
  superficial 
  examination 
  one 
  sees 
  none 
  

   of 
  the 
  parts 
  usually 
  found 
  in 
  an 
  insect's 
  ovary; 
  i. 
  e., 
  ovarioles, 
  egg- 
  

   follicles, 
  etc. 
  The 
  whole 
  organ 
  seems 
  rather 
  to 
  consist 
  of 
  but 
  a 
  

   Single 
  ovariole 
  containing 
  but 
  a 
  Single 
  follicle 
  with 
  its 
  ovum 
  and 
  

   nutritive 
  cells. 
  As 
  a 
  matter 
  of 
  fact, 
  the 
  peritoneal 
  covering 
  which 
  

   encloses 
  the 
  ovary 
  is 
  of 
  extraordinary 
  thickness, 
  thicker, 
  perhaps, 
  

   than 
  in 
  any 
  other 
  insect 
  and 
  forms 
  an 
  elastic 
  sac 
  within 
  which 
  lie 
  

   two 
  ovarioles 
  (PI. 
  III, 
  Fig. 
  12). 
  The 
  walls 
  of 
  this 
  sac 
  are 
  made 
  up 
  

   of 
  muscle 
  fibres 
  and 
  connective-tissue 
  and 
  are 
  a 
  direct 
  continuation 
  

   of 
  the 
  outer 
  covering 
  of 
  the 
  oviducts 
  and 
  the 
  uterus 
  (peri.cov). 
  Each 
  

   of 
  the 
  two 
  ovarioles 
  within 
  the 
  sac 
  consists 
  of 
  two 
  follicles 
  and 
  a 
  

   germarium 
  ; 
  no 
  distinct 
  terminal 
  thread 
  is 
  present, 
  although 
  the 
  terminal 
  

   portions 
  of 
  the 
  germarium 
  may 
  be 
  considered 
  as 
  such 
  a 
  structure. 
  

   The 
  ovarioles 
  are 
  attached 
  by 
  means 
  of 
  their 
  germaria 
  to 
  the 
  inner, 
  

   distal 
  surface 
  of 
  the 
  peritoneal 
  sac 
  and 
  at 
  no 
  other 
  place, 
  hanging, 
  

   thus, 
  free 
  within 
  the 
  sac 
  (see 
  woodcut 
  No. 
  1, 
  also 
  Fig. 
  12). 
  The 
  

   ovariole 
  is 
  bounded 
  on 
  its 
  outer 
  surface 
  by 
  a 
  structureless 
  tunica 
  

   propria 
  (Fig. 
  1 
  2 
  tun.prop) 
  and 
  by 
  an 
  inner 
  peritoneal 
  covering 
  composed 
  

   cxclusively 
  of 
  connective-tissue 
  fibres 
  which 
  project 
  from 
  the 
  inner 
  

   surface 
  of 
  the 
  distal 
  end 
  of 
  the 
  peritoneal 
  sac 
  [in. 
  peri.cov). 
  

  

  