﻿524 
  Panama 
  Shells. 
  solenid^. 
  

  

  Of 
  this 
  species, 
  hitherto 
  unique 
  in 
  the 
  Cumingian 
  collection, 
  

   we 
  obtained 
  only 
  1 
  specimen 
  of 
  the 
  convex 
  valve. 
  Col. 
  Jewett 
  

   also 
  brought 
  a 
  convex 
  valve 
  to 
  Dr. 
  Gould, 
  and 
  retained 
  another 
  

   odd 
  valve 
  from 
  Mazatlan. 
  

  

  508. 
  Corbula 
  . 
  Sp. 
  indet. 
  'a. 
  

  

  , 
  This 
  species 
  has 
  some 
  resemblance 
  to 
  G. 
  Taheitensis. 
  We 
  

   obtained 
  at 
  Panama 
  but 
  1 
  valve, 
  which 
  is 
  probably 
  immature. 
  

  

  509. 
  Corbtlla 
  . 
  S^x 
  indet. 
  6. 
  

  

  Two 
  left 
  valves 
  were 
  obtained 
  at 
  Panama, 
  

  

  Family— 
  SOLENIDJS. 
  

  

  510. 
  iSolecurtus 
  affiniis. 
  Nov. 
  sp. 
  

  

  Shell 
  much 
  elongated, 
  compressed 
  cylindric, 
  well 
  rounded 
  at 
  

   both 
  extremities; 
  ventral 
  edge 
  straight 
  or 
  slightly 
  arcuated: 
  

   white 
  beneath 
  a 
  deep 
  yellowish 
  brown 
  epidermis 
  : 
  with 
  unequal 
  

   striae 
  of 
  growth 
  : 
  beaks 
  not 
  prominent, 
  a 
  little 
  behind 
  the 
  mid- 
  

   dle 
  of 
  the 
  shell 
  : 
  umbones 
  compressed 
  along 
  the 
  middle: 
  liga- 
  

   ment 
  broad, 
  with 
  stout 
  nymphteal 
  callosities 
  : 
  teeth 
  small, 
  one 
  

   in 
  the 
  left, 
  and 
  two 
  in 
  the 
  right 
  valve. 
  This 
  is 
  the 
  analogue 
  of 
  

   S. 
  Cariboeus. 
  

  

  Length 
  2.25 
  inches; 
  height 
  ,8 
  inch; 
  breadth 
  .55 
  inch. 
  

  

  Station. 
  — 
  Unknown. 
  

  

  Habitat. 
  — 
  Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   10 
  specimens 
  were 
  collected. 
  

  

  511. 
  ISoleii 
  riidis. 
  Nov. 
  sp. 
  

   Shell 
  solid, 
  straight 
  or 
  slightly 
  recurved 
  ; 
  with 
  the 
  posterior 
  

   extremity 
  abruptly 
  truncated 
  nearly 
  perpendicularly 
  ; 
  ante- 
  

   riorly 
  with 
  very 
  thick 
  rounded 
  margins: 
  white 
  beneath 
  a 
  

   brown 
  deciduous 
  epidermis, 
  which 
  is 
  produced 
  much 
  beyond 
  

   the 
  margins 
  : 
  with 
  only 
  indistinct 
  stria) 
  of 
  growth 
  on 
  the 
  shell 
  ; 
  

   with 
  some 
  radiating 
  lines 
  on 
  the 
  epidermis 
  : 
  beaks 
  inconspicu- 
  

  

  