333 
The  dorsal  surface  evenly  vaulted  from  side  to  side;  the  ventral 
surface  flat. 
The  pleurae  free  as  in  the  Glomeridae.  Legs  six-jointed,  basal 
segments  large.  The  pedal  laminae  invisible.  The  first  tergite  smaller 
than  the  second  but  resembling  it  in  shape;  the  second  tergite  like 
the  rest  in  form.  The  anal  tergite  vaulted  from  side  to  side,  incom- 
plete below,  and  forming  a  complete  hood,  which  covers  the  posterior 
legs  as  in  the  Glomeridae.  The  head  strongly  convex  from  above 
downwards:  no  eyes,  but  a  large  circular  depression  above  the  base 
of  the  antennae;  antennae  close  together,  situated  on  the  front  of  the 
face;  their  articular  socket  closed  behind.  Mouth  mandibulate. 
30.  Glomeridesmus  sumatranus,  sp.  n. 
Sumatra:  Mount  Singalang.  One  example. 
Colour.  Head  fuscous  above,  pale  below,  dorsal  surface  a  uni- 
form brown  tint;  lower  surface,  legs  and  antennae  pale. 
Head  not  sulcate  above,  smooth,  hairy  below;  antennae  hairy  along 
the  under  surface. 
Somites  overlapping,  smooth,  furnished  above  in  front  with  a  few 
fine  transverse  striae  which  below  laterally  curve  round  and  take  up 
a  longitudinal  direction.  Towards  the  posterior  end  of  the  body  the 
postero-inferior  angle  is  produced  directly  backwards  into  a  tooth 
like  prominence,  which  increases  in  size  towards  the  hinder  end, 
that  on  the  anal  tergite  being  the  largest. 
In  the  legs  the  femur  is  the  largest  segment,  the  tarsus  is  very 
slender  and  is  armed  with  a  distinct  claw. 
Length  about  6  mm.;  width  about  1.3. 
Order  helminthomorph a  ,  Pocock. 
Ann.  Mag.  Nat.  Hist.  (5),  Vol.  XX  pp.  283—295  (1887). 
Elongate  slender  Diplopoda,  capable  of  being  spirally  coiled  (exc. 
Sphaeriodesmus). 
Body  composed  of  from  19  to  over  90  segments,  the  1st  or  2*a 
segment  sometimes  larger  than  those  that  succeed  them  but  the  anal 
segment  is  nearly  always  smaller  than  those  in  front  of  it  and  only 
very  rarely  a  little  larger.  The  anal  tergite  forming  a  complete  ring, 
which  surrounds  a  pair  of  anal  valves  (?  pleurae)  and  an  unpaired 
sternite  (?  pedal  lamina).  The  pleurae  of  the  body-segments  very  ra- 
22 
