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  THE 
  KADULA 
  OF 
  THE 
  GENUS 
  COMINELLA, 
  H. 
  & 
  A. 
  ADAMS. 
  

   Ey 
  the 
  Rev. 
  A. 
  H. 
  Cooke, 
  Sc.D., 
  F.Z.S. 
  

  

  Eead 
  9th 
  March, 
  1917. 
  

  

  The 
  genus 
  Cominella 
  appears 
  to 
  occur 
  in 
  two 
  principal 
  nuclei 
  of 
  

   geographical 
  distribution, 
  (1) 
  the 
  Cape, 
  (2) 
  South 
  Australia, 
  Tasmania, 
  

   and 
  New 
  Zealand. 
  It 
  has 
  not 
  been 
  reported 
  from 
  South 
  American 
  

   waters, 
  where, 
  in 
  the 
  extreme 
  south, 
  it 
  appears 
  to 
  be 
  replaced 
  by 
  

   a 
  considerable 
  development 
  of 
  tlie 
  genus 
  Euihria, 
  and, 
  though 
  there 
  is 
  

   an 
  outlying 
  species 
  {Jncata, 
  A. 
  Ad.) 
  said, 
  on 
  inconsiderable 
  authority, 
  

   to 
  come 
  from 
  Japan,' 
  it 
  has 
  not 
  been 
  recorded 
  from 
  Western 
  North 
  

   America. 
  The 
  Philippines 
  is 
  another 
  doubtful 
  locality 
  for 
  another 
  

   doubtful 
  species 
  {crocea, 
  A. 
  Ad.). 
  

  

  Kobelt, 
  in 
  1878, 
  enumerated'' 
  34 
  species 
  in 
  all: 
  Cape 
  12, 
  New 
  

   Zealand 
  9, 
  Chatham 
  Is. 
  1, 
  Port 
  Western 
  1, 
  South 
  Australia 
  4, 
  

   Tasmania 
  1, 
  Swan 
  R. 
  1, 
  Darnley 
  Is. 
  1, 
  doubtful 
  localities 
  4. 
  Tryon's 
  

   sweeping 
  methods 
  ' 
  reduced 
  these 
  to 
  about 
  20. 
  G. 
  R. 
  Sowerbv 
  

   listed* 
  17 
  species 
  in 
  all 
  from 
  South 
  Africa, 
  the 
  generic 
  position 
  of 
  

   4 
  of 
  which 
  was 
  doubtful. 
  Paul 
  Bartsch, 
  in 
  1915, 
  added* 
  4 
  rhore 
  

   species 
  to 
  this 
  list, 
  making 
  21 
  in 
  all. 
  H. 
  Suter 
  ^ 
  recognizes 
  10 
  species 
  

   from 
  New 
  Zealand 
  and 
  the 
  outlying 
  island 
  groups, 
  from 
  the 
  Kermadecs 
  

   to 
  Campbell 
  Is., 
  two 
  at 
  least 
  of 
  which 
  (costata, 
  Quoy, 
  lineolata, 
  Lam.) 
  

   are 
  also 
  found 
  in 
  Australian 
  waters.' 
  

  

  For 
  the 
  purposes 
  of 
  the 
  present 
  paper 
  the 
  radulae 
  of 
  the 
  following 
  

   species 
  (all 
  from 
  the 
  collection 
  of 
  the 
  late 
  Professor 
  H. 
  M. 
  Gwatkin) 
  

   have 
  been 
  examined 
  : 
  — 
  

  

  AuSTRO-NEOZEALANIAIf 
  SPECIES. 
  CaPE 
  SPECIES. 
  

  

  adelaidensis, 
  Crosse. 
  delalandii, 
  Kien. 
  

  

  alveolata, 
  Kien. 
  elongata. 
  Dunk. 
  

  

  costata, 
  Quoy. 
  lagenaria, 
  Lam. 
  

  

  Jilicea, 
  Cr. 
  & 
  Fisch. 
  limbosa, 
  Lam. 
  

  

  hiittoni, 
  Kob. 
  porcata, 
  Gmel. 
  

  

  lineolata, 
  Lam. 
  tigrina, 
  Kien. 
  

  

  lun'da, 
  Phil. 
  

   viactdata, 
  Mart. 
  

   maculosa, 
  Mart. 
  

   virgata, 
  H. 
  & 
  A. 
  Ad. 
  

  

  I. 
  The 
  general 
  facies 
  of 
  the 
  radula 
  of 
  the 
  Austro-Neozealanian 
  

   group 
  is 
  as 
  follows 
  : 
  Rhachidian 
  tooth 
  with 
  three 
  sharp 
  narrow 
  cusps 
  

  

  ^ 
  Cominella 
  fortilirata, 
  Sowb., 
  from 
  Urup, 
  Kurile 
  Is., 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  

  

  ser. 
  VIII, 
  vol. 
  xi, 
  1913, 
  p. 
  557, 
  seems 
  a 
  very 
  doubtful 
  Cominella. 
  

   '^ 
  Jahrb. 
  Deutsch. 
  Malak. 
  Gesell., 
  Bd. 
  v, 
  p. 
  231. 
  

   ^ 
  Man. 
  Conch., 
  vol. 
  iii, 
  1881, 
  pp. 
  201-7. 
  

  

  * 
  Marine 
  Shells 
  of 
  South 
  Africa, 
  1892, 
  pp. 
  9-11. 
  

  

  * 
  Report 
  on 
  the 
  Turton 
  Collection 
  of 
  South 
  African 
  Marine 
  Mollusks 
  

  

  (Smithsonian 
  Inst. 
  Bulletin 
  91). 
  

  

  * 
  Manual 
  of 
  the 
  Netv 
  Zealand 
  Mollusca, 
  1913, 
  pp. 
  381-91. 
  

   '' 
  W. 
  L. 
  May, 
  Vict. 
  Nat., 
  vol. 
  xxx, 
  1913, 
  pp. 
  55-60. 
  

  

  