﻿smith: 
  PELECri'ODA. 
  FEOM 
  THE 
  PHILIPPINES. 
  17 
  

  

  The 
  young 
  of 
  P. 
  lapicida 
  (Chemnitz) 
  Gmelin, 
  has 
  soniewliat 
  tlie 
  

   form 
  of 
  this 
  species, 
  but 
  the 
  sculpture 
  is 
  different, 
  being 
  coarser, 
  and 
  

   it 
  has 
  no 
  definite 
  lunular 
  area. 
  A 
  single 
  valve 
  from 
  Flinders 
  Passage, 
  

   North 
  Australia, 
  recorded 
  in 
  my 
  report 
  on 
  the 
  Cliallenger 
  Lamelli- 
  

   branchiata, 
  p. 
  118, 
  belongs 
  to 
  the 
  present 
  species 
  and 
  not 
  to 
  P. 
  lapicida. 
  

  

  DosiNiA. 
  STJBALATA, 
  n.sp. 
  PL 
  I, 
  Figs. 
  11-13. 
  

  

  Shell 
  subcircular, 
  moderately 
  convex, 
  rather 
  thin, 
  white 
  with 
  rosy 
  

   tips 
  to 
  the 
  umbones, 
  very 
  delicately 
  concentrically 
  striated 
  at 
  first 
  

   and 
  then 
  rather 
  more 
  distantly 
  towards 
  the 
  base, 
  the 
  threads 
  between 
  

   the 
  striae 
  smooth 
  upon 
  the 
  central 
  part 
  of 
  the 
  valves 
  and 
  becoming 
  

   finely 
  lamellar 
  both 
  anteriorly 
  and 
  behind 
  ; 
  lunule 
  elongate-cordate, 
  

   prominent 
  in 
  the 
  middle, 
  fairly 
  striated; 
  escutcheon 
  raised 
  and 
  keeled 
  

   down 
  the 
  middle, 
  defined 
  by 
  a 
  shallow 
  depression 
  in 
  each 
  valve 
  

   extending 
  from 
  near 
  the 
  umbones 
  nearly 
  the 
  whole 
  length 
  of 
  tlie 
  

   posterior 
  dorsal 
  margin 
  ; 
  the 
  valves 
  at 
  this 
  part 
  consequently 
  exhibit 
  

   a 
  narrow 
  wing-like 
  prominence; 
  interior 
  of 
  valves 
  whitish 
  ; 
  anterior 
  

   adductor 
  scar 
  narrow, 
  elongate, 
  posterior 
  pyriform 
  ; 
  pallial 
  sinus 
  

   long, 
  tongue-like, 
  extending 
  some 
  way 
  beyond 
  the 
  middle 
  of 
  the 
  

   valves, 
  blunt 
  at 
  the 
  end 
  ; 
  hinge 
  normal. 
  

  

  Length 
  25, 
  height 
  24, 
  diameter 
  11 
  mm. 
  

  

  Allied 
  to 
  D. 
  lucinalis, 
  Lamarck, 
  of 
  which 
  D. 
  sfriattssima, 
  Sowerby, 
  

   is 
  a 
  synonym. 
  The 
  concentric 
  sculpture 
  of 
  the 
  present 
  species, 
  

   however, 
  is 
  finer, 
  and 
  it 
  lacks 
  the 
  radiating 
  striae 
  of 
  D. 
  lucinalis. 
  The 
  

   form 
  of 
  the 
  latter 
  is 
  somewhat 
  different, 
  being 
  shorter 
  in 
  proportion 
  to 
  

   the 
  height. 
  The 
  pallial 
  sinus 
  is 
  considerably 
  longer 
  in 
  P. 
  subalata. 
  

  

  P. 
  ccelata, 
  lleeve, 
  is 
  even 
  more 
  closely 
  related, 
  and 
  differs 
  only 
  in 
  

   having 
  stronger 
  lamellae 
  in 
  front 
  and 
  behind, 
  a 
  larger 
  and 
  much 
  

   deeper 
  dorsal 
  area 
  marked 
  off 
  by 
  a 
  sharper 
  cristate 
  keel, 
  and 
  a 
  slightly 
  

   shorter 
  pallial 
  sinus. 
  

  

  Antigona 
  (Venteicola) 
  mindoroensis, 
  n.sp. 
  PL 
  I, 
  Figs. 
  1-3. 
  

  

  Shell 
  sub-globose, 
  very 
  inequilateral, 
  white, 
  with 
  four 
  curved, 
  

   sub-equidistant, 
  reddish 
  rays, 
  concentrically 
  delicately 
  lamellated, 
  the 
  

   lamellae 
  being 
  thin, 
  erect, 
  and 
  cross-striated 
  on 
  the 
  lower 
  side 
  ; 
  between 
  

   the 
  lamellas 
  the 
  surface 
  exhibits 
  fine 
  thread-like 
  lines, 
  four 
  or 
  five 
  

   in 
  each 
  interval, 
  also 
  excessively 
  minute 
  curved 
  radiating 
  striae 
  ; 
  lunule 
  

   broadly 
  cordiform, 
  brown, 
  sunken 
  except 
  in 
  the 
  middle, 
  where 
  it 
  is 
  

   a 
  little 
  raised 
  ; 
  marked 
  with 
  fine 
  raised 
  lines 
  of 
  growth 
  ; 
  escutcheon 
  

   deep, 
  defined 
  by 
  a 
  sharp 
  keel 
  in 
  the 
  left 
  valve, 
  upon 
  which 
  the 
  lamellte 
  

   terminate 
  ; 
  the 
  portion 
  of 
  the 
  escutcheon 
  in 
  the 
  right 
  valve 
  is 
  smaller 
  

   than 
  that 
  of 
  the 
  left 
  and 
  less 
  sharply 
  defined, 
  the 
  lamellae 
  extending 
  

   further 
  over 
  towards 
  the 
  edge 
  of 
  the 
  valve 
  ; 
  umbones 
  yellowish 
  or 
  

   pale 
  brown 
  at 
  the 
  smooth 
  tips 
  which 
  curve 
  forward 
  over 
  the 
  lunule 
  ; 
  

   interior 
  of 
  the 
  valves 
  white 
  outside 
  the 
  pallial 
  line, 
  ver}' 
  faintly 
  

   tinted 
  with 
  a 
  kind 
  of 
  flesh 
  tint 
  within 
  the 
  pallial 
  line, 
  which 
  is 
  shortly 
  

   angularly 
  sinuated 
  ; 
  inner 
  edge 
  of 
  the 
  valves 
  very 
  finely 
  crenulated 
  

   all 
  round 
  excepting 
  on 
  the 
  hinder 
  dorsal 
  margin, 
  the 
  crenulations 
  on 
  

   the 
  edge 
  of 
  the 
  lunule 
  being 
  finer 
  than 
  those 
  on 
  the 
  ventral 
  edge 
  ; 
  

   anterior 
  adductor 
  scar 
  ovate, 
  posterior 
  larger, 
  sub-reniform. 
  

  

  VOL. 
  Xll. 
  — 
  MARCH, 
  1916. 
  2 
  

  

  