﻿AND 
  OTHER 
  FAMILIES. 
  109 
  

  

  Cyrena 
  turgida. 
  Plate 
  XVIII. 
  fig. 
  53. 
  

  

  Testa 
  trigond, 
  inflatd, 
  parte 
  antica 
  turgida, 
  rugosd, 
  insequilaterd, 
  transversim 
  

   rugatd 
  ; 
  valvulis 
  crassis 
  ; 
  natibus 
  elevatis, 
  recurvis 
  ; 
  dentibus 
  cardinalibus 
  sub-bi- 
  

   fidis, 
  dente 
  anteriore 
  laterali 
  brevi 
  et 
  elevato, 
  posterior 
  e 
  longo 
  et 
  laminato 
  ; 
  rnar- 
  

   garitd 
  alba. 
  

  

  Shell 
  triangular, 
  inflated, 
  swollen 
  on 
  the 
  anterior 
  part, 
  rugose, 
  inequilateral, 
  trans- 
  

   versely 
  wrinkled 
  ; 
  valves 
  thick 
  ; 
  beaks 
  elevated, 
  recurved 
  ; 
  cardinal 
  teeth 
  disposed 
  to 
  

   be 
  bifid 
  ; 
  anterior 
  lateral 
  tooth 
  short 
  and 
  elevated 
  ; 
  posterior 
  lateral 
  tooth 
  long 
  and 
  lam- 
  

   ellar 
  ; 
  nacre 
  white. 
  

  

  Hab 
  , 
  India. 
  Rev. 
  William 
  Carey. 
  

  

  My 
  Cabinet. 
  

   Diam. 
  1-2, 
  Length 
  1-7, 
  Breadth 
  2-1 
  inches. 
  

  

  Shell 
  triangular, 
  inflated, 
  swollen 
  on 
  the 
  anterior 
  part, 
  rugose, 
  in- 
  

   equilateral, 
  transversely 
  wrinkled 
  ; 
  substance 
  of 
  the 
  shell 
  thick 
  ; 
  beaks 
  

   elevated, 
  recurved 
  ; 
  ligament 
  rather 
  long 
  and 
  narrow; 
  epidermis 
  yel- 
  

   lowish 
  brown, 
  darker 
  towards 
  the 
  margin 
  ; 
  cardinal 
  teeth 
  disposed 
  to 
  

   be 
  bifid 
  ; 
  anterior 
  lateral 
  tooth 
  short 
  and 
  elevated, 
  somewhat 
  conical 
  ; 
  

   posterior 
  lateral 
  tooth 
  long 
  and 
  lamellar 
  ; 
  cicatrices 
  scarcely 
  perceptible 
  ; 
  

   cavity 
  of 
  the 
  shell 
  deep 
  and 
  rounded 
  ; 
  cavity 
  of 
  the 
  beaks 
  angular 
  ; 
  

   nacre 
  w 
  7 
  hite. 
  

  

  Remarks. 
  — 
  To 
  the 
  kindness 
  of 
  Dr 
  Carey 
  of 
  Calcutta 
  1 
  owe 
  several 
  

   specimens 
  of 
  this 
  species. 
  In 
  the 
  teeth 
  it 
  resembles 
  the 
  C. 
  Zeylanica 
  

   (Lamarck), 
  and 
  the 
  C. 
  papua 
  (Lesson). 
  It 
  differs 
  from 
  both 
  in 
  being 
  

   more 
  triangular, 
  more 
  inflated, 
  as 
  well 
  as 
  in 
  being 
  a 
  smaller 
  species. 
  

   In 
  the 
  enlargement 
  of 
  the 
  anterior 
  part, 
  which 
  seems 
  to 
  be 
  turgid 
  or 
  

   swollen, 
  it 
  diners 
  from 
  any 
  Cyrena 
  w 
  r 
  ith 
  which 
  I 
  am 
  acquainted. 
  

   Being 
  without 
  serrulate 
  teeth, 
  it 
  belongs 
  to 
  Lamarck's 
  second 
  divi- 
  

   sion 
  — 
  " 
  dents 
  laterales 
  entieres. 
  

  

  VOL. 
  V. 
  — 
  2 
  c 
  

  

  