﻿HuTTON, 
  — 
  Description 
  of 
  some 
  new 
  Slugs, 
  331 
  

  

  Art. 
  XXXVI. 
  — 
  Description 
  of 
  some 
  new 
  Slugs. 
  By 
  Prof. 
  F. 
  W. 
  Hutton. 
  

  

  [Read 
  before 
  the 
  Otago 
  Institute, 
  2Qth 
  November, 
  1878.] 
  

   LiMAX 
  MOLESTUS, 
  

  

  Mantle 
  short 
  aucl 
  flatly 
  rounded 
  behind, 
  smooth 
  and 
  sub-concentrically 
  

   wrinkled 
  when 
  alive, 
  rugose 
  and 
  not 
  wrinkled 
  in 
  spirit. 
  Pulmonary 
  

   opening 
  in 
  the 
  posterior 
  third 
  of 
  the 
  mantle 
  ; 
  back 
  rounded 
  behind 
  the 
  

   mantle, 
  pointed 
  and 
  keeled 
  posteriorly 
  ; 
  body 
  with 
  irregular 
  longitudinal 
  

   rib-like 
  protuberances 
  ; 
  colour 
  variable 
  — 
  greyish 
  or 
  reddish-brown 
  variously 
  

   marbled 
  with 
  dusky. 
  Tentacles 
  of 
  the 
  same 
  colour 
  as 
  the 
  back 
  ; 
  loot 
  

   yellowish-white. 
  Length, 
  about 
  H 
  inches. 
  Shell 
  slightly 
  concave. 
  A 
  

   rather 
  common 
  variety 
  is 
  quite 
  black. 
  

  

  Dunediii, 
  Wellington, 
  etc. 
  Abundant 
  everywhere. 
  

  

  The 
  radula 
  has 
  33 
  rows 
  of 
  rachis 
  teeth, 
  and 
  about 
  20 
  on 
  each 
  side 
  of 
  

   lateral 
  teeth. 
  

  

  This 
  species 
  is 
  closely 
  allied 
  to 
  L. 
  agrcsiis 
  of 
  Europe, 
  but 
  is 
  larger, 
  the 
  

   keel 
  is 
  not 
  oblique, 
  the 
  pulmonary 
  opening 
  is 
  placed 
  more 
  posteriorly, 
  and 
  

   the 
  ovo-testis 
  is 
  more 
  elongated. 
  In 
  Dr. 
  Knight's 
  paper 
  on 
  the 
  Bitenta= 
  

   culate 
  Slug 
  of 
  New 
  Zealand 
  (Trans. 
  Lin. 
  Soc. 
  XXII., 
  p. 
  381) 
  figures 
  8, 
  11, 
  

   12, 
  and 
  15 
  belong 
  to 
  this 
  species. 
  

  

  MiLAX 
  EMAEGINATUS. 
  

  

  Mantle 
  slightly 
  shagreened, 
  short 
  and 
  emarginate 
  behind 
  ; 
  pulmonary 
  

   opening 
  a 
  little 
  behind 
  the 
  centre. 
  A 
  depressed 
  hue 
  runs 
  from 
  this 
  opening 
  

   forward 
  over 
  the 
  back, 
  and 
  backward 
  again 
  to 
  a 
  point 
  on 
  the 
  left 
  side 
  

   opposite 
  the 
  pulmonary 
  openiug. 
  Back 
  sharply 
  keeled 
  up 
  to 
  the 
  mantle 
  ; 
  

   body 
  smooth, 
  with 
  depressed 
  lines 
  radiating 
  from 
  the 
  mantle. 
  Colour 
  dark 
  

   grey 
  or 
  olive 
  above 
  ; 
  foot 
  and 
  lower 
  sides 
  of 
  the 
  body 
  yellowish-white. 
  

   Length 
  1 
  inch. 
  Shell 
  small, 
  nearly 
  flat 
  ; 
  length 
  -08 
  inch. 
  

  

  Dunedin 
  ; 
  common 
  in 
  gardens, 
  etc. 
  

  

  Distinguished 
  from 
  M. 
  antipodarum 
  by 
  the 
  shape 
  of 
  the 
  mantle 
  and 
  

   smooth 
  body. 
  I 
  have 
  ill. 
  antipodarum 
  from 
  Wellington. 
  The 
  radula 
  has 
  

   27 
  rows 
  of 
  rachis 
  teeth, 
  and 
  about 
  25 
  on 
  each 
  side 
  of 
  lateral 
  teeth. 
  The 
  

   transverse 
  rows 
  are 
  curved, 
  the 
  convexity 
  being 
  in 
  the 
  direction 
  of 
  the 
  

   apices 
  of 
  the 
  teeth. 
  

  

  Aeion 
  incommodus. 
  

  

  Mantle 
  rugose, 
  short 
  and 
  rounded 
  behind 
  ; 
  pulmonary 
  opening 
  in 
  front 
  

   of 
  the 
  middle 
  ; 
  back 
  rounded, 
  not 
  pointed 
  posteriorly 
  ; 
  colour 
  dark 
  lead- 
  

   grey, 
  a 
  lateral 
  stripe 
  on 
  the 
  mantle, 
  and 
  a 
  longitudinal 
  band 
  on 
  each 
  side, 
  

   black 
  ; 
  sometimes 
  the 
  whole 
  upper 
  part 
  of 
  the 
  body 
  greyish 
  black 
  ; 
  foot 
  

   yeUow. 
  Length 
  1 
  inch 
  ; 
  shell 
  rudimentary. 
  

  

  Dunedin. 
  Not 
  uncommon 
  in 
  gardens, 
  etc. 
  

  

  