﻿504 
  Dr. 
  L. 
  Cognetti 
  de 
  Martiis 
  on 
  the 
  

  

  o' 
  

  

  two 
  small 
  longitudinal 
  stripes, 
  which 
  are 
  interrupted 
  at 
  the 
  

   intersegmental 
  furrows. 
  The 
  stripes 
  extend 
  on 
  segments 
  

   xviii. 
  to 
  xxvi. 
  (^ 
  xxvii.) 
  and 
  on 
  segments 
  (^ 
  xxxii., 
  xxxiii.) 
  

   ljn 
  xxxiii. 
  and 
  xxxiv. 
  They 
  are 
  placed 
  laterally 
  to 
  the 
  lines 
  

   of 
  setae 
  6 
  ; 
  between 
  these 
  lines 
  and 
  stripes 
  are 
  found 
  the 
  

   paired 
  lateral 
  papilla?. 
  Close 
  ventrally 
  to 
  the 
  stripes, 
  for 
  

   their 
  whole 
  length, 
  are 
  two 
  thin 
  grey 
  bands, 
  which 
  are 
  inter- 
  

   rupted, 
  as 
  are 
  the 
  stripes, 
  on 
  the 
  space 
  between 
  segments 
  

   xxvi. 
  and 
  xxxiii. 
  or 
  xxxiv. 
  (PI. 
  XIII. 
  fig. 
  12). 
  

  

  In 
  this 
  space 
  the 
  body-depression 
  is 
  greatest, 
  and 
  the 
  lateral 
  

   margins 
  are 
  quite 
  sharp 
  and 
  expanded 
  to 
  form 
  two 
  fin-like 
  

   plates, 
  a 
  little 
  undulated, 
  which 
  extend 
  to 
  segments 
  xxvii.— 
  

   xxxii. 
  or 
  \ 
  xxxiii. 
  (or 
  xxxiii.), 
  being 
  in 
  the 
  lines 
  of 
  the 
  stripes 
  

   described 
  above 
  (PI. 
  XIII. 
  fig. 
  11). 
  Each 
  plate 
  is 
  about 
  

   1 
  mm. 
  wide, 
  their 
  margins 
  are 
  parallel, 
  and 
  their 
  ends 
  

   diminish 
  rapidly 
  in 
  breadth. 
  

  

  The 
  two 
  stripes, 
  with 
  the 
  adjacent 
  grey 
  bands, 
  are 
  similar 
  

   to 
  the 
  tubercula 
  pubertatis 
  of 
  some 
  Lumbricidae 
  — 
  for 
  example, 
  

   of 
  Octohisium 
  complanatum 
  (Ant. 
  Dug.) 
  *, 
  — 
  and 
  the 
  fin-like 
  

   plates 
  correspond 
  to 
  the 
  organs 
  which 
  in 
  other 
  species 
  of 
  

   Glyphidrilus 
  have 
  been 
  named 
  by 
  llosaf 
  "tubercula 
  puber- 
  

   tatis/' 
  by 
  Horst 
  \ 
  " 
  clitellar 
  ridges," 
  and 
  by 
  Michaelsen 
  § 
  

   " 
  Pubertatstuberkel- 
  Walle/' 
  " 
  clitelliale 
  Langswiilste," 
  

   " 
  Pubertatssaume." 
  

  

  It 
  seems 
  to 
  me 
  that 
  these 
  fin-like 
  plates 
  may 
  be 
  regarded 
  

   as 
  corresponding 
  to 
  those 
  curious 
  appendages 
  which 
  have 
  

   been 
  described 
  in 
  the 
  Criodriline 
  genera 
  Alma 
  and 
  Criodrilus 
  

   under 
  the 
  name 
  of 
  u 
  penes." 
  They 
  are 
  provided, 
  among 
  

   other 
  things, 
  with 
  a 
  rich 
  vascularization 
  || 
  like 
  the 
  last- 
  

   named 
  organs. 
  The 
  whole 
  shape 
  is 
  altogether 
  different. 
  

  

  The 
  nephridial 
  pores 
  are 
  in 
  the 
  lines 
  of 
  setse 
  b. 
  

  

  I 
  found 
  the 
  male 
  pores 
  only 
  in 
  two 
  specimens. 
  They 
  

   appear 
  as 
  two 
  point-like 
  d 
  pressions 
  on 
  intersegmental 
  furrow 
  

   xxix.-xxx. 
  in 
  the 
  lines 
  of 
  setse 
  b. 
  

  

  The 
  female 
  pores 
  are 
  not 
  visible. 
  

  

  The 
  small 
  spermathecal 
  pores 
  are 
  distributed 
  in 
  various 
  

   numbers 
  — 
  to 
  six 
  pairs 
  — 
  on 
  intersegmental 
  furrows 
  xiii.-xiv. 
  

   to 
  xvi-xvii. 
  On 
  each 
  side 
  they 
  are 
  contained 
  between 
  the 
  

  

  * 
  See 
  the 
  figur6 
  of 
  the 
  clitellar 
  region 
  of 
  this 
  species 
  given 
  by 
  Rosa, 
  

   (14) 
  pi. 
  i. 
  tig. 
  4. 
  

  

  t 
  See 
  Rosa, 
  (15) 
  p. 
  387, 
  pi. 
  xii. 
  fig. 
  1. 
  

  

  j 
  See 
  Horst, 
  (5) 
  pp. 
  38, 
  76, 
  and 
  pi. 
  ii. 
  fig. 
  18. 
  

  

  § 
  See 
  Michaelsen, 
  (6) 
  pp. 
  196, 
  197, 
  242, 
  and 
  pi. 
  xiii. 
  fig. 
  1 
  civ. 
  ; 
  

   (7) 
  pp. 
  459-461 
  ; 
  (8) 
  p. 
  36 
  ; 
  (13) 
  p. 
  102. 
  

  

  || 
  See 
  Horst, 
  (5) 
  p. 
  39. 
  The 
  structure 
  and 
  development 
  of 
  the 
  " 
  penes 
  " 
  

   of 
  the 
  Criodrilinae 
  are 
  the 
  subject 
  of 
  a 
  recent 
  paper 
  by 
  nie 
  (3). 
  

  

  