﻿MUREX. 
  ^ 
  Panama 
  Shells. 
  347 
  

  

  figure 
  of 
  M. 
  amUguus. 
  So 
  far, 
  therefore, 
  as 
  we 
  can 
  judge 
  from 
  

   the 
  100 
  specimens 
  collected 
  in 
  one 
  locality, 
  the 
  M. 
  amhiguus 
  

   appears 
  to 
  be, 
  not 
  a 
  dominant 
  type, 
  but 
  the 
  extreme 
  limit 
  of 
  

   variation. 
  It 
  is 
  quite 
  possible, 
  however, 
  that 
  a 
  greater 
  number 
  

   of 
  specimens 
  collected 
  in 
  various 
  localities 
  would 
  confirm 
  the 
  

   opinions 
  of 
  Mr. 
  Eeeve. 
  

  

  Dr. 
  Menke, 
  in 
  distinguishing 
  M. 
  amhiguus 
  from 
  M. 
  nigritus, 
  

   among 
  the 
  shells 
  from 
  Mazatlan, 
  (Zeitschr. 
  fiir 
  Malak, 
  1850, 
  

   p. 
  188,) 
  finds 
  nine 
  varices 
  in 
  his 
  specimens 
  of 
  the 
  former. 
  

   M. 
  radix 
  is 
  not 
  mentioned 
  as 
  occurring 
  among 
  them. 
  

  

  Station. 
  — 
  On 
  mud 
  banks 
  at 
  low 
  water 
  ; 
  Cuming 
  : 
  Eeeve. 
  

  

  Our 
  specimens 
  were 
  found 
  in 
  part 
  in 
  the 
  crevices 
  of 
  rocks, 
  

   but 
  chiefly 
  about 
  stones, 
  where 
  there 
  was 
  more 
  or 
  less 
  of 
  sandy 
  

   mud, 
  near 
  low 
  water 
  mark. 
  

  

  Habitat. 
  — 
  East 
  Indian 
  Seas 
  ; 
  Dillwyn. 
  

  

  Shores 
  of 
  Acapulco 
  ; 
  Humboldt 
  and 
  Bonpland 
  ! 
  La- 
  

   marck 
  : 
  also 
  Valenciennes. 
  

  

  Acapulco 
  ; 
  Say 
  in 
  Catal. 
  Mus. 
  

  

  Shores 
  of 
  Acapulco 
  and 
  of 
  Panama 
  ; 
  Kiener. 
  

  

  Bay 
  of 
  Caraccas 
  ; 
  Cuming 
  ! 
  Sowerby 
  : 
  also 
  Eeeve. 
  

  

  Bay 
  of 
  Caraccas 
  ; 
  Jay. 
  

  

  Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   We 
  collected 
  100 
  specimens 
  on 
  the 
  reef. 
  Two 
  of 
  them 
  weigh 
  

   22 
  ounces 
  each, 
  and 
  one 
  of 
  these 
  is 
  bh 
  inches 
  long. 
  

  

  Habitat 
  of 
  M. 
  ambiguus. 
  — 
  Unknown 
  ; 
  Eeeve. 
  

  

  Mazatlan 
  ; 
  Melchers 
  ! 
  Menke. 
  

   Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   Murex 
  nigritus 
  Phil, 
  we 
  were 
  unable 
  to 
  find 
  at 
  Panama. 
  

  

  139. 
  ITIurei: 
  rectirostris. 
  

  

  Synonymy. 
  

  

  Murex 
  rectirostris 
  Sowb. 
  in 
  Proc. 
  Zool. 
  Soc. 
  Lond. 
  p. 
  138. 
  Nov. 
  1840. 
  

  

  Sowb. 
  Conch. 
  111. 
  pi. 
  197. 
  f. 
  111. 
  1841. 
  

  

  Reeve 
  Conch. 
  Icon, 
  pi, 
  22. 
  f. 
  91. 
  June 
  1845. 
  

  

  