﻿Mr. 
  E. 
  A. 
  Smith 
  on 
  the 
  Genus 
  Lobiger. 
  309 
  

  

  5' 
  

  

  covered 
  by 
  the 
  shell. 
  This 
  is 
  the 
  case 
  with 
  three 
  Sicilian 
  

   specimens 
  in 
  the 
  Museum 
  and 
  the 
  two 
  examples 
  from 
  Ceylon. 
  

   None 
  exhibit 
  parapodia, 
  and 
  all 
  have 
  the 
  foot 
  sharply 
  trun- 
  

   cate 
  behind, 
  so 
  that 
  I 
  am 
  of 
  opinion 
  that 
  this 
  animal 
  has 
  not 
  

   only 
  the 
  power 
  of 
  casting 
  off 
  the 
  lateral 
  lobes, 
  as 
  described 
  by 
  

   Krohn, 
  but 
  also, 
  like 
  the 
  genera 
  Ilarpa 
  and 
  Gena, 
  is 
  able 
  

   spontaneously 
  to 
  detach 
  the 
  hinder 
  portion 
  of 
  the 
  foot. 
  

  

  Not 
  one 
  of 
  the 
  five 
  specimens 
  has 
  the 
  parapodia 
  remain- 
  

   ing, 
  so 
  that 
  it 
  must 
  be 
  concluded 
  that 
  they 
  have 
  either 
  been 
  

   cast 
  off 
  or 
  have 
  not 
  been 
  developed. 
  The 
  character 
  of 
  the 
  

   cephalic 
  or 
  tentacular 
  lobes 
  is 
  quite 
  the 
  same 
  in 
  all 
  ; 
  the 
  sides 
  

   of 
  the 
  foot 
  are 
  more 
  or 
  less 
  tubercular, 
  and 
  > 
  when 
  closely 
  

   examined, 
  are 
  seen 
  to 
  be 
  minutely 
  speckled. 
  

  

  I 
  have 
  extracted 
  the 
  odontophore 
  from 
  one 
  of 
  the 
  Ceylonese 
  

   specimens 
  and 
  find 
  that 
  it 
  corresponds 
  precisely 
  with 
  the 
  

   figure 
  given 
  by 
  Vayssiere 
  of 
  that 
  of 
  L. 
  Philippii. 
  

  

  From 
  the 
  similarity 
  of 
  habitat 
  I 
  conclude 
  that 
  the 
  two 
  

   specimens 
  sent 
  by 
  Mr. 
  Thurston 
  belong 
  to 
  L. 
  viridis 
  of 
  G. 
  

   and 
  H. 
  Nevill. 
  Beyond 
  difference 
  of 
  locality 
  and 
  the 
  inter- 
  

   rupted 
  linear 
  markings 
  on 
  the 
  mantle 
  there 
  appear 
  to 
  be 
  no 
  

   distinguishing 
  features 
  in 
  this 
  so-called 
  species. 
  

  

  I 
  have 
  made 
  tracings 
  of 
  all 
  the 
  figures 
  which 
  have 
  ap- 
  

   peared 
  of 
  the 
  different 
  species 
  of 
  the 
  genus, 
  and, 
  on 
  com- 
  

   parison, 
  it 
  is 
  curious 
  to 
  note 
  what 
  slight 
  variation 
  exists 
  in 
  

   the 
  shells 
  ; 
  indeed, 
  taking 
  the 
  figures 
  which 
  represent 
  L. 
  

   Serradifalci, 
  one 
  may 
  observe 
  more 
  difference 
  of 
  outline 
  

   among 
  them 
  than 
  between 
  some 
  of 
  them 
  and 
  the 
  other 
  

   so-called 
  species. 
  Allowing 
  for 
  alteration 
  of 
  form 
  in 
  respect 
  

   of 
  size 
  and 
  age, 
  I 
  cannot 
  discover 
  valid 
  conchological 
  dis- 
  

   tinctions 
  in 
  any 
  of 
  the 
  species. 
  

  

  In 
  the 
  British 
  Museum 
  a 
  specimen 
  from 
  Sicily 
  received 
  

   from 
  the 
  late 
  Robert 
  MacAndrew 
  curiously 
  enough 
  more 
  

   nearly 
  resembles 
  the 
  figure 
  given 
  by 
  Pease 
  of 
  L. 
  pictus 
  from 
  the 
  

   Society 
  Islands 
  than 
  any 
  other. 
  

  

  Below 
  is 
  given 
  the 
  synonymy 
  of 
  all 
  the 
  described 
  species. 
  

   Lobiger 
  Gumingii, 
  A. 
  Adams 
  *, 
  as 
  pointed 
  out 
  by 
  G. 
  and 
  H 
  

   Nevill 
  f, 
  should 
  be 
  removed 
  to 
  the 
  genus 
  Volvatella 
  of 
  Pease. 
  

  

  Lobiger 
  Serradifalci 
  (Calcara). 
  

  

  1840. 
  Bullea 
  ? 
  Serradifalci, 
  Calcara, 
  Monogr. 
  Clausilla 
  &c. 
  p. 
  44. 
  

   1845. 
  Dolabella 
  Serradifalci, 
  Calcara, 
  Rev. 
  Zool. 
  p. 
  280. 
  

  

  * 
  Thesaurus 
  Couch, 
  vol. 
  ii. 
  p. 
  399, 
  pi. 
  cxxi. 
  fig. 
  58. 
  

   f 
  Jouru. 
  As. 
  Soc. 
  Beng. 
  1869, 
  vol. 
  xxxviii. 
  pt. 
  2, 
  p. 
  06. 
  

  

  Ann. 
  & 
  Mag. 
  N. 
  Hist. 
  Ser. 
  6. 
  Vol. 
  iii. 
  22 
  

  

  