70 
of  them  consists  of  a  large  globular  pouch  and  a  rather  long,  coiled, 
tubular  diverticulum. 
18.  Perichaeta  sp. 
Flores:  Kotting  and  Wukur. 
Celebes:  Luwu. 
In  the  isles  of  Flores  and  Celebes  some  examples  of  Perichaeta  were 
collected,  which  are  not  in  a  state  of  complete  sexual  maturity  and 
therefore  could  not  be  identified.  Among  them  there  is  one  specimen 
from  Flores  with  only  a  single  spermatheca  of  a  peculiar  shape  at 
the  rigth  side  of  segment  VII.  It  is  a  rather  long,  slender  worm,  with 
the  cephalic  and  caudal  region  much  dilated;  it  measures  about  120 
mm.  in  lenght.  The  buccal  cavity  is  everted,  therefore  the  cephalic 
lobe  could  not  be  recognized 
The  setae  are  arranged  in  a  continuous  row,  on  a  prominent  ridge; 
each  segment  shows  one  or  two  transverse  grooves  in  front  of  and 
behind  the  row,  except  on  the  clitellum.  The  male  pores  are  situated 
on  prominent  papillae.  The  dorsal  pores  commence  in  the  interseg- 
mental groove  XII/XIII;  they  are  also  visible  upon  the  clitellum. 
The  5th,  6th  and  7th  dissepiment  are  much  thickened,  connected 
with  each  other  by  several  muscle- fascicles  and  entirely  hide  the  oeso- 
phagus; the  8th  and  9th  septum  are  absent. 
The  single  spermatheca  (Pl.  Ill  fig.  28)  is  a  rather  large  oval 
pouch,  with  a  long  excretory  duct  and  somewhat  resembles  a  scotch 
bagpipe;  a  tubular  diverticulum,  coiled  in  a  zigzag  line,  is  connected 
with  it.  The  internal  structure  shows  no  particularity  and  agrees  with 
that  of  other  Perichaeta-species. 
Megascolex  Templeton. 
Setae  numerous,  arranged  in  a  row  round  each  segment,  interrup- 
ted in  the  median  dorsal  and  ventral  lines.  Clitellum  consisting  of 
more  than  three  segments.  Gizzard  in  front  of  segment  VII.  No  in- 
testinal coeca.  Diffuse  nephridial  tufts  present. 
Presently  only  three  l)  species  of  this  genus  are  known  with  cer- 
tainty, though  I  have  no  doubt,  that  before  long  more  Perichaetidae 
will  prove  to  belong  to  it  ;  perhaps  P.  intermedia  Bedd. 8)  must  be 
1)  M.  brachycyclus  Schmarda  is  a  dubious  species,  there  being  nothing  but  the  colour 
to  distinguish  it. 
2)  Quartl.  Journ.  Microsc.  Science,  Vol.  XXX,  p.  467. 
