﻿MOLLUSCA. 
  63 
  

  

  39. 
  Turbinella 
  (Tudicula) 
  armigera. 
  (Plate 
  V. 
  fig. 
  G.) 
  

  

  Tudicla 
  armigera, 
  A. 
  Adams, 
  Proc. 
  Zool. 
  Soc. 
  1855, 
  p. 
  221 
  ; 
  Kobelt, 
  

   Conch.-Cali., 
  Furpuracea, 
  ii'i. 
  p. 
  20 
  ; 
  Tri/on, 
  Man. 
  Conch, 
  vol. 
  iii. 
  

   p. 
  144, 
  pi. 
  58. 
  fig. 
  411. 
  

  

  Hab. 
  Moreton 
  Bay 
  {Strange) 
  ; 
  Port 
  Curtis, 
  0-11 
  fms., 
  and 
  Port 
  

   MoUe, 
  14 
  fms. 
  {Coppinger). 
  

  

  As 
  the 
  Latiu 
  diagnosis 
  given 
  by 
  Adams 
  is 
  defective 
  in 
  several 
  

   important 
  points, 
  I 
  here 
  give 
  a 
  more 
  ample 
  description 
  of 
  this 
  

   remarkable 
  species. 
  Shell 
  clavately 
  fusiform, 
  whitish, 
  longitudinally 
  

   streaked 
  with 
  reddish 
  brown, 
  clothed 
  with 
  a 
  rather 
  thin, 
  somewhat 
  

   fibrous, 
  yellowish 
  ejndcrmis. 
  Spire 
  short, 
  concavely 
  conical, 
  obtuse 
  

   and 
  mamillated 
  at 
  the 
  apex. 
  Whorls 
  G 
  ; 
  the 
  two 
  nuclear 
  ones 
  

   smooth, 
  convex 
  ; 
  the 
  three 
  following 
  nearly 
  flat 
  or 
  a 
  little 
  concave 
  

   and 
  sloping, 
  angled 
  at 
  the 
  lower 
  part 
  near 
  the 
  suture, 
  bearing 
  at 
  the 
  

   angle 
  a 
  series 
  of 
  upturned, 
  slightly 
  recurved 
  hollow 
  spines, 
  orna- 
  

   mented 
  with 
  fine 
  wavy 
  spiral 
  lirations 
  both 
  above 
  and 
  below 
  the 
  

   angle. 
  Last 
  whorl 
  like 
  the 
  three 
  preceding 
  at 
  the 
  upper 
  part, 
  but 
  

   having 
  the 
  spines, 
  about 
  nine 
  in 
  number, 
  much 
  longer, 
  increasing 
  

   in 
  length 
  with 
  the 
  growth 
  of 
  tlie 
  shell 
  ; 
  body 
  of 
  whorl 
  a 
  trifle 
  

   convex, 
  indistinctly 
  variced 
  or 
  costate 
  beneath 
  each 
  spine, 
  bearing 
  

   three 
  to 
  five 
  lirse 
  armed 
  with 
  numerous 
  short 
  hollow 
  spines, 
  the 
  

   interstices 
  being 
  ornamented 
  with 
  two 
  or 
  three 
  thread-like 
  lirations 
  ; 
  

   lower 
  part 
  of 
  the 
  whorl 
  prolonged 
  into 
  a 
  straight 
  canal 
  occupying 
  

   about 
  half 
  the 
  length 
  of 
  the 
  entire 
  shell, 
  bearing 
  two 
  obli(iue 
  rows 
  

   of 
  spines, 
  those 
  of 
  the 
  upper 
  series 
  being 
  considerably 
  longest 
  : 
  a 
  

   third 
  row 
  is 
  also 
  indicated 
  at 
  the 
  lower 
  part, 
  and 
  the 
  entire 
  rostrum 
  

   is 
  obliquely 
  lirated 
  throughout. 
  Aperture 
  ovate, 
  white 
  or 
  pinkish 
  

   white. 
  Outer 
  lip 
  thickened, 
  crenulated 
  at 
  the 
  margin, 
  with 
  about 
  

   eight 
  lirse 
  within. 
  Columella 
  covered 
  with 
  a 
  large 
  erect 
  spreading 
  

   callosity 
  extending 
  from 
  the 
  upper 
  extremity 
  of 
  the 
  labrura 
  to 
  i.he 
  

   lower 
  end 
  of 
  the 
  aperture, 
  armed 
  with 
  three 
  plaits, 
  of 
  which 
  the 
  

   lowermost 
  is 
  the 
  thickest. 
  Operculum 
  ovate, 
  acute 
  at 
  the 
  nucleus, 
  

   which 
  is 
  terminal, 
  brown. 
  Length 
  G5 
  millim., 
  greatest 
  diam. 
  30. 
  

  

  This 
  beautiful 
  shell 
  was 
  originally 
  placed 
  in 
  Tudicla, 
  one 
  of 
  

   those 
  non-admissible 
  divisions 
  of 
  Bolton, 
  and 
  subsequently 
  a 
  new 
  

   genus, 
  Tudicula, 
  was 
  proposed 
  by 
  H. 
  and 
  A. 
  Adams 
  (P. 
  Z. 
  S. 
  1863, 
  

   p. 
  429) 
  for 
  the 
  reception 
  of 
  this 
  and 
  a 
  second 
  species, 
  T.spinosa, 
  also 
  

   from 
  Port 
  Curtis. 
  A 
  third 
  form, 
  T. 
  inermis, 
  has 
  more 
  recently 
  been 
  

   described 
  by 
  Mr. 
  G. 
  P. 
  Angas, 
  presumed 
  to 
  have 
  come 
  from 
  Singa- 
  

   pore. 
  All 
  of 
  these 
  species 
  have 
  the 
  plaits 
  on 
  the 
  columella, 
  the 
  

   mamillated 
  apex, 
  and 
  the 
  largely 
  developed 
  and 
  prominent 
  callosity 
  

   on 
  the 
  inner 
  lip 
  as 
  in 
  the 
  typical 
  forms 
  of 
  Turbinella., 
  e. 
  g. 
  T.pyrum 
  

   and 
  T. 
  rapa., 
  and 
  differ 
  mainly 
  in 
  the 
  greater 
  length 
  of 
  the 
  canal. 
  

   The 
  operculum, 
  too, 
  is 
  essentially 
  the 
  same 
  ; 
  and 
  therefore 
  the 
  utility 
  

   of 
  this 
  generic 
  division 
  becomes 
  very 
  questionable. 
  

  

  