﻿8 
  c. 
  BOVALLIUS, 
  lANTHE. 
  

  

  The 
  maxillipedes 
  (Pl. 
  II, 
  fig. 
  22) 
  totally 
  cover 
  tlie 
  other 
  

   organs 
  of 
  tlie 
  mouth; 
  tliey 
  are 
  fixed 
  at 
  the 
  posterior 
  margin 
  

   of 
  the 
  excavation, 
  which 
  forms 
  the 
  mouth. 
  Each 
  maxilliped 
  

   consists 
  of 
  a 
  broad 
  and 
  large 
  protopodite, 
  divided 
  into 
  a 
  

   short 
  coxa 
  and 
  a 
  long 
  basis. 
  The 
  basis 
  is 
  produced 
  at 
  its 
  

   upper 
  coruer 
  into 
  a 
  lamina, 
  nearly 
  as 
  long 
  as 
  broad, 
  straight 
  

   at 
  its 
  inner 
  and 
  upper 
  margin, 
  arched 
  at 
  the 
  outer; 
  the 
  upper 
  

   margin 
  is 
  richly 
  provided 
  with 
  denticulate 
  bristles 
  (Pl. 
  II, 
  

   lig. 
  23), 
  every 
  one 
  supported 
  by 
  a 
  little 
  tuberele. 
  At 
  the 
  

   side 
  of 
  this 
  lamina, 
  at 
  the 
  upper 
  corner 
  of 
  the 
  basis, 
  arises 
  a 
  

   five-articulated, 
  palpiform 
  appendage, 
  the 
  endopodite, 
  which 
  is 
  

   longer 
  than 
  the 
  rest 
  of 
  the 
  limb. 
  The 
  first 
  joint 
  or 
  ischium 
  

   is 
  broad 
  and 
  short; 
  the 
  second, 
  meros, 
  more 
  than 
  twice 
  as 
  

   long, 
  broad 
  and 
  flat, 
  finely 
  ciliated 
  at 
  the 
  inner 
  margin; 
  

   the 
  third, 
  carpus, 
  is 
  shorter 
  and 
  narrower, 
  with 
  a 
  .furrow 
  at 
  

   its 
  inner 
  margin 
  for 
  the 
  reception 
  of 
  the 
  following 
  joints. 
  

   The 
  edges 
  of 
  this 
  ridge 
  are 
  finely 
  ciliated. 
  Propus, 
  the 
  fourth 
  

   joint, 
  is 
  as 
  long 
  as 
  the 
  second, 
  but 
  much 
  narrower, 
  provided 
  

   with 
  long 
  hairs 
  at 
  the 
  upper 
  corner. 
  The 
  last 
  joint, 
  the 
  dac- 
  

   tylus, 
  is 
  shorter, 
  richly 
  covered 
  with 
  nairs 
  at 
  the 
  top. 
  From 
  the 
  

   basal 
  joint 
  of 
  the 
  maxilliped 
  extends 
  outwards 
  a 
  great 
  triangulär 
  

   plate, 
  the 
  exopodite, 
  (Pl. 
  II, 
  fig. 
  22); 
  the 
  inner 
  margin 
  is 
  

   feebly 
  arched, 
  the 
  outer 
  concave, 
  the 
  lower 
  is 
  nearly 
  straight. 
  

   At 
  the 
  upper 
  corner 
  the 
  exopodite 
  carries 
  some 
  short, 
  simple 
  

   hairs. 
  

  

  The 
  Jirst 
  pair 
  of 
  gnathopoda 
  (Pl. 
  III, 
  fig. 
  2&) 
  is 
  shorter 
  

   than 
  the 
  following, 
  and 
  subcheliformed. 
  They 
  are 
  attached 
  

   to 
  the 
  under 
  side 
  of 
  the 
  flattened, 
  lateral 
  corners 
  of 
  the 
  first 
  

   segment. 
  The 
  hasis 
  is 
  tolerably 
  long, 
  directed 
  towards 
  the 
  

   median 
  line 
  of 
  the 
  body. 
  The 
  Ischium 
  is 
  shorter 
  than 
  the 
  

   ' 
  basis, 
  but 
  stout. 
  The 
  meros 
  is 
  short, 
  anteriorly 
  produced 
  

   and 
  armed 
  with 
  a 
  short 
  spine. 
  The 
  carpus 
  is 
  broad 
  and 
  long, 
  

   at 
  the 
  inner 
  margin 
  armed 
  with 
  strong, 
  short 
  spines 
  and 
  

   denticulated. 
  The 
  propus 
  is 
  shorter, 
  reaching 
  fully 
  to 
  the 
  

   middle 
  of 
  the 
  carpus, 
  against 
  which 
  it 
  falls, 
  forming 
  a 
  

   subcheliform 
  hand. 
  Its 
  inner 
  margin 
  is 
  finely 
  denticulated. 
  

   The 
  dactylus 
  is 
  very 
  short 
  [a 
  fourth 
  of 
  the 
  preceding] 
  with 
  

   a 
  few, 
  simple 
  hairs. 
  At 
  its 
  top 
  are 
  fixed 
  the 
  two 
  characte- 
  

   ristic 
  ungues; 
  the 
  outer 
  stronger, 
  movable 
  (Pl. 
  II, 
  fig. 
  27). 
  

   the 
  inner 
  shorter, 
  half 
  the 
  len^th 
  of 
  the 
  outer. 
  There 
  is 
  ne 
  

   trace 
  of 
  an 
  exopodite. 
  

  

  