﻿MOLLUSCA. 
  49 
  

  

  Nassa 
  (Alectrioii) 
  uiiicolor, 
  A. 
  Adams, 
  P. 
  Z. 
  S. 
  \So\, 
  p. 
  100. 
  

  

  Nassa 
  unicolorata, 
  Reeve, 
  Conch. 
  Icon. 
  fig. 
  1 
  7. 
  

  

  Nassa 
  rutilaiis, 
  Reeve, 
  I. 
  c. 
  p. 
  147. 
  

  

  Nassa 
  Isevis, 
  If. 
  4' 
  -4. 
  Adams, 
  Genera 
  Mol. 
  vol. 
  i. 
  pp. 
  110 
  & 
  119, 
  

  

  pi. 
  V2. 
  fig._7. 
  

   Nassa 
  (Zeuxis) 
  unicolora, 
  Kiener, 
  Adams, 
  I.e. 
  p. 
  119. 
  

  

  Hah. 
  Cape 
  York, 
  N, 
  Australia 
  {Juices) 
  ; 
  Torres 
  Straits 
  {Brazier); 
  

   Port 
  Curtis 
  and 
  Port 
  Molle, 
  Queensland, 
  12-20 
  fms, 
  (Coppiiiijer); 
  

   Sir 
  C. 
  Hardy's 
  Island 
  (Jukes). 
  

  

  New 
  Zealand, 
  the 
  locality 
  given 
  by 
  Reeve 
  for 
  N. 
  rutilans, 
  is 
  pro- 
  

   bably 
  incorrect. 
  

  

  The 
  operculum 
  of 
  this 
  species 
  is 
  unguiculate, 
  curved, 
  with 
  a 
  ter- 
  

   minal 
  nucleus 
  and 
  simple 
  unserrated 
  edges. 
  

  

  31. 
  Nassaria 
  suturalis, 
  var. 
  

  

  Hindsia 
  suturalis, 
  A. 
  Adams, 
  Proc. 
  Zool. 
  Soc. 
  1853, 
  p. 
  183 
  ; 
  Sowerhy, 
  

   Thes. 
  Conch, 
  iii. 
  pi. 
  220. 
  tigs. 
  15, 
  IG 
  ; 
  Kobelt,in 
  Kiisters 
  Con.-Cab., 
  

   Purpwacea, 
  pi. 
  77. 
  tigs. 
  11, 
  12. 
  

  

  Iliudsia 
  bitubercularis, 
  A. 
  Adams, 
  P. 
  Z. 
  S. 
  1853, 
  p. 
  183 
  j 
  Soioerhy, 
  

   I. 
  c. 
  tig. 
  5 
  ; 
  Kubelt, 
  I. 
  c. 
  tigs. 
  9, 
  10. 
  

  

  Nassaria 
  recurva, 
  Soicerh/, 
  I. 
  c. 
  tigs. 
  17, 
  18. 
  

  

  Nassaria 
  sinensis, 
  Soiverbi/, 
  Thesaurus, 
  tigs. 
  8, 
  9; 
  Kobelt, 
  tig. 
  8. 
  

  

  Hah. 
  Port 
  Darwin, 
  North-west 
  Australia, 
  8-12 
  fms. 
  {Coppinger); 
  

   China 
  Sea, 
  Philippine 
  Islands, 
  and 
  Ceylon 
  {Adams 
  and 
  Soiverby). 
  

  

  A 
  single 
  sjiecimen 
  from 
  Port 
  Darwin 
  agrees 
  precisely 
  with 
  the 
  

   variety 
  sinensis. 
  After 
  a 
  careful 
  examination 
  of 
  the 
  so-called 
  species 
  

   which 
  I 
  have 
  united 
  above, 
  I 
  cannot 
  detect 
  any 
  constant 
  differences. 
  

   The 
  above 
  variety 
  I 
  believe 
  to 
  be 
  founded 
  on 
  non-adult 
  shells 
  for 
  

   two 
  reasons 
  : 
  — 
  first, 
  I 
  find 
  only 
  six 
  whorls, 
  exclusive 
  of 
  the 
  smooth 
  

   apical 
  ones, 
  being 
  one 
  less 
  than 
  in 
  the 
  typical 
  suturalis 
  ; 
  and, 
  

   secondly, 
  the 
  aperture 
  is 
  larger, 
  a 
  result 
  due 
  to 
  the 
  less 
  degree 
  of 
  

   thickening 
  of 
  the 
  labrum 
  and 
  columella. 
  It 
  is 
  true 
  that 
  the 
  suture 
  

   is 
  less 
  excavated, 
  but 
  this 
  concavity 
  is 
  variable 
  in 
  specimens 
  un- 
  

   doubtedly 
  normal. 
  The 
  number 
  of 
  costte 
  is 
  also 
  inconstant, 
  varying 
  

   from 
  nine 
  to 
  twelve 
  on 
  a 
  whorl 
  ; 
  in 
  the 
  former 
  case, 
  as 
  might 
  be 
  ex- 
  

   pected, 
  being 
  thicker 
  than 
  in 
  the 
  latter. 
  The 
  tuberculation 
  and 
  

   liration 
  on 
  the 
  columella 
  depend 
  for 
  the 
  amount 
  of 
  their 
  develojiment 
  

   upon 
  age, 
  adult 
  shells 
  having 
  a 
  larger 
  quantity 
  and 
  a 
  greater 
  expan- 
  

   sion 
  of 
  the 
  free 
  columellar 
  caQosity 
  than 
  young 
  specimens, 
  but 
  the 
  

   lirae 
  within 
  the 
  outer 
  lip, 
  wlien 
  countable, 
  are 
  generally 
  about 
  nine 
  

   iu 
  number, 
  

  

  32. 
  Phos 
  scalaroides. 
  

   A. 
  Adams; 
  Sowerhy'' 
  s 
  Thes. 
  Conch, 
  vul. 
  iii. 
  pi. 
  221. 
  tig. 
  13. 
  

  

  Hah. 
  Prince 
  of 
  "Wales 
  Channel, 
  Torres 
  Straits, 
  9 
  fms, 
  i^Cop- 
  

   pinr/er). 
  

  

  This 
  form 
  1 
  cannot 
  separate 
  satisfactorily 
  from 
  P. 
  plicatus 
  and 
  

   P. 
  textilis, 
  both 
  of 
  A. 
  Adams 
  ; 
  and 
  I 
  am 
  of 
  opinion 
  that 
  w 
  ere 
  tlie 
  

  

  E 
  

  

  