﻿GUDE 
  : 
  ON 
  GENERA 
  OF 
  ZONITIB^. 
  271 
  

  

  vol. 
  xlvi, 
  p. 
  322,' 
  1827, 
  a 
  new 
  designation 
  becomes 
  necessary. 
  Type 
  

   Helix 
  Massoni, 
  Behn., 
  from 
  the 
  Nicobar 
  Islands. 
  

  

  Kee^a," 
  n.n. 
  

  

  This 
  name 
  is 
  proposed 
  for 
  Julus, 
  Wollaston, 
  Testacea 
  Atlantica, 
  

   1878, 
  p. 
  80, 
  not 
  Julus, 
  Leach, 
  Zool. 
  Misc., 
  vol, 
  iii, 
  p. 
  32, 
  1817, 
  

   a 
  genus 
  of 
  Myriopoda. 
  Type 
  Patula 
  GaracMcoensis, 
  Woll., 
  from 
  

   Tenerife, 
  Canary 
  Islands. 
  Pilsbry 
  places 
  Julus 
  as 
  a 
  section 
  of 
  

   Pyramidula 
  {Man. 
  Condi. 
  (2), 
  vol. 
  ix, 
  p. 
  341, 
  1894). 
  

  

  IluTHVENiA, 
  n.n. 
  

  

  When 
  this 
  writer 
  proposed 
  tlie 
  name 
  Syhesia^ 
  in 
  lieu 
  of 
  Atistem'a,* 
  

   a 
  sub-penus 
  of 
  Pledopijlis, 
  Mr. 
  E. 
  Iluthven 
  Sykes 
  pointed 
  out 
  that 
  

   Pomel 
  had 
  already 
  in 
  1883* 
  published 
  a 
  genus 
  of 
  Echinoderms 
  under 
  

   this 
  appellation. 
  Thus 
  a 
  new 
  name 
  is 
  required 
  for 
  this 
  group, 
  and 
  

   I 
  propose 
  that 
  Syhesia 
  be 
  replaced 
  by 
  Ruthvenia. 
  

  

  Pomel's 
  work, 
  which 
  contains 
  176 
  new 
  generic 
  names, 
  appears 
  to 
  

   have 
  escaped 
  the 
  notice 
  of 
  the 
  recorders, 
  and 
  although 
  a 
  careful 
  

   search 
  has 
  failed 
  to 
  reveal 
  any 
  other 
  instances 
  of 
  names 
  of 
  Helicoids 
  

   being 
  invalidated 
  by 
  this 
  publication, 
  malacologists 
  working 
  in 
  other 
  

   divisions 
  of 
  MoUusca 
  should 
  not 
  fail 
  to 
  consult 
  the 
  work 
  in 
  question 
  

   in 
  addition 
  to 
  the 
  usual 
  records. 
  

  

  In 
  1899, 
  when 
  splitting 
  iip 
  the 
  genus 
  Plectopylis 
  into 
  several 
  

   subdivisions, 
  I 
  expressed 
  the 
  opinion^ 
  that 
  when 
  the 
  anatomy 
  of 
  the 
  

   species 
  referred 
  to 
  this 
  section 
  should 
  be 
  investigated, 
  they 
  would 
  

   probably 
  be 
  found 
  to 
  differ 
  considerably 
  from 
  typical 
  Plectopylis, 
  and 
  

   that 
  they 
  would 
  rank 
  as 
  a 
  separate 
  genus. 
  This 
  has 
  since 
  been 
  

   confirmed 
  by 
  Lieut.-Colonel 
  Godwin-Austen, 
  who 
  has 
  examined 
  the 
  

   soft 
  parts 
  of 
  Syhesia 
  hiciliata, 
  Pfr.,'' 
  and 
  is 
  of 
  opinion 
  that 
  it 
  is 
  closely 
  

   related 
  to 
  Thysanota. 
  

  

  Arch^oplecta, 
  n.g. 
  

  

  Shell 
  trochoid, 
  finely 
  ribbed, 
  margins 
  of 
  peristome 
  acute, 
  columellar 
  

   margin 
  reflected, 
  overhanging 
  the 
  narrow 
  umbilical 
  perforation. 
  

  

  Nanina 
  (Gray), 
  auct. 
  (in 
  part). 
  

  

  Type 
  : 
  Helix 
  stenotrypta, 
  A. 
  Braun, 
  from 
  the 
  Lower 
  Miocene 
  

   (Aquitanian), 
  Mayence 
  Basin. 
  

  

  The 
  type-species 
  of 
  this 
  new 
  genus 
  has 
  been 
  stated 
  by 
  Sandberger 
  

   to 
  be 
  related 
  to 
  Eulota 
  ravida, 
  Bens., 
  from 
  China, 
  but 
  the 
  specimens 
  in 
  

   the 
  British 
  Museum 
  (Nat. 
  Hist.), 
  to 
  which 
  I 
  have 
  had 
  access, 
  do 
  not 
  

   bear 
  out 
  this 
  view, 
  as 
  they 
  show 
  no 
  trace 
  of 
  spiral 
  sculpture 
  and 
  the 
  

   columella 
  is 
  different 
  in 
  character. 
  It 
  bears 
  a 
  greater 
  resemblance, 
  in 
  

   my 
  opinion, 
  to 
  some 
  species 
  of 
  Hemiplecta, 
  notably 
  H. 
  Everetti, 
  Smith, 
  

  

  ' 
  Not 
  p. 
  231 
  as 
  given 
  in 
  Scudder's 
  Nomenclator 
  . 
  

  

  '^ 
  Kepaia, 
  a 
  trifle. 
  

  

  ^ 
  Science 
  Gossip., 
  N.s., 
  vol. 
  iii, 
  p. 
  332, 
  1897. 
  

  

  ^ 
  Tom. 
  cit., 
  p. 
  300. 
  

  

  ^ 
  Classif. 
  meth. 
  et 
  gen. 
  Ech. 
  viv. 
  et 
  foss., 
  p. 
  88. 
  

  

  ^ 
  Science 
  Gossip, 
  N.S., 
  vol. 
  vi, 
  p. 
  149. 
  

  

  ' 
  Land 
  and 
  Freshivater 
  Mollusca 
  of 
  India, 
  vol. 
  ii, 
  p. 
  196, 
  1907. 
  

  

  