﻿NOTRS 
  ON 
  RHABDOPLEURA 
  NORMANI, 
  ALLMAN. 
  31 
  

  

  Fig. 
  9.— 
  The 
  right 
  longitudinal 
  muscle 
  of 
  the 
  stalk 
  appears. 
  

  

  Fig. 
  10. 
  — 
  The 
  oesophagus 
  separated 
  from 
  the 
  stoniodseuni 
  by 
  the 
  lower 
  

  

  lip. 
  

   Fig. 
  11. 
  — 
  Below 
  the 
  proboscis-stalk. 
  

  

  Fig. 
  12. 
  — 
  The 
  left 
  longitudinal 
  muscle 
  of 
  the 
  stalk 
  appears. 
  

   Fig. 
  14. 
  — 
  The 
  gymnocaulus. 
  

  

  Fig. 
  15. 
  — 
  Diagrammatic 
  reconstruction 
  of 
  the 
  foregoing 
  sections 
  as 
  a 
  longi- 
  

   tudinal 
  section 
  beginning 
  just 
  below 
  the 
  insertion 
  of 
  the 
  lophophoral 
  arms, 
  the 
  

   outline 
  of 
  the 
  trunk 
  body-cavity, 
  which 
  of 
  course 
  is 
  not 
  cut 
  in 
  a 
  median 
  dorso- 
  

   ventral 
  section, 
  being 
  marked 
  by 
  daslies. 
  The 
  numbered 
  arrows 
  indicate 
  tiie 
  

   corresponding 
  figures 
  of 
  the 
  transverse 
  sections. 
  

  

  Figs. 
  16, 
  17, 
  IS. 
  — 
  Buds 
  at 
  the 
  end 
  of 
  a 
  terminal 
  branch, 
  a 
  short 
  length 
  of 
  

   pectocaulus 
  intervening 
  between 
  the 
  successive 
  figures. 
  Of 
  these 
  fig. 
  16 
  is 
  the 
  

   growing 
  end 
  of 
  the 
  biancii, 
  and 
  tig. 
  18 
  tiie 
  oldest 
  bud 
  drawn, 
  x 
  110. 
  Tiie 
  

   lowest 
  bud 
  in 
  Fig. 
  16 
  is 
  viewed 
  from 
  the 
  right 
  side, 
  and 
  gives 
  a 
  good 
  idea 
  of 
  

   the 
  way 
  in 
  which 
  the 
  lophophoral 
  arms 
  spring 
  from 
  the 
  end 
  of 
  the 
  body 
  

   proper, 
  and 
  the 
  proboscis 
  stands 
  out 
  on 
  the 
  ventral 
  side. 
  

  

  Fig. 
  ly. 
  — 
  Successive 
  sections 
  o( 
  the 
  collar-pore 
  and 
  canal 
  of 
  tiie 
  right 
  side 
  

   of 
  an 
  adult 
  animal. 
  X 
  about 
  520. 
  

  

  