theca.  Its  enlarged  terminal  portion  wants  the  thick  muscular  coat ,  which 
envelops  the  remaining  part  of  the  spermatheca  and  is  lined  with  a 
layer  of  tall  colummar  cells,  containing  a  fine  granular  protoplasma, 
which  no  doubt  secrete  the  fluid  with  fine  granules,  found  in  this 
portion  (Pl.  II.  fig.  5).  The  cells  lining  the  tubular  portion  have  a 
somewhat  different  appearance;  they  are  not  only  narrower,  but  con- 
sist of  a  more  homogeneous  protoplasma,  that  contains  no  granules 
and  is  stained  diffusedly.  The  diverticulum  shows  an  epithelium  of 
very  low,  quadrangular  cells.  I  have  not  observed  the  curious  alte- 
rations, described  by  Beddard  in  the  epithelium  of  the  spermathecae 
in  sexually  mature  specimens  of  A.  georgianus  and  A.  rosae  1). 
A  pair  of  rather  large  ovaries,  containing  numerous  mature  ova, 
occupy  segment  XIII;  opposite  to  them  the  funnels  of  the  oviducts  are 
situated.  The  external  apertures  of  these  ducts  however  I  could  not 
find.  The  funnels  of  the  sperm-ducts  lie  free  in  segments  X  and  XI; 
the  spermatozoida  are  contained  partially  in  the  body-cavity,  partially 
they  are  enclosed  in  vesiculae  séminales,  occupying  segments  IX  —  XII. 
The  prostates  are  long,  tubular  organs,  consisting  of  pyriform glan- 
dular cells,  which  open  between  the  tall  columnar  cells,  lining  their 
central  canal. 
2.  Benhamia  floresiana  n.  sp. 
Flores:  Maumeri,  Kotting,  Wukur,  several  specimens. 
Sumatra:  Fort  de  Kock,  a  single  specimen. 
The  length  of  the  largest  specimens  is  35  to  40  mm.  ;  the  number 
of  their  segments  is  about  125.  The  body  is  usually  discoloured;  only 
the  region  behind  the  clitellum  is  blackish ,  owing  to  the  transparency 
of  the  body-wall  and  the  consequent  visibility  of  intestinal  contents. 
The  cephalic  lobe  is  small,  somewhat  wedge-shaped,  embedded 
into  the  buccal  segment  to  about  the  half  of  its  length  (Pl.  IL  fig.  6). 
The  anterior  five  segments  have  a  greater  longitudinal  diameter  than 
the  succeeding  ones.  Each  segment  shows  in  its  middle  a  circular 
ridge;  beneath  this  ridge  the  skin  appears  to  contain  a  double  row 
of  glands ,  visible  through  the  body- wall  in  some  specimens.  The  dor- 
sal pores  commence  in  the  intersegmental  groove  VI/ VII. 
The  cl  it  ell  am  is  very  obvious,  occupying  segment  XIII  -XXI; 
it  is  incomplete,  its  ventral  side  being  not  or  not  very  glandular. 
1)  Quarter.  Journ.  of  Microsc.  Science,  Vol.  XXX,  p.  435,  pi.  30. 
