﻿On 
  the 
  Genus 
  Melapium, 
  H. 
  and 
  A. 
  Adams. 
  267 
  

  

  timet, 
  Aube. 
  I 
  think 
  the 
  two 
  might 
  well 
  form 
  a 
  distinct 
  

   genus 
  on 
  account 
  of 
  the 
  Scojiceus-Yike 
  structure 
  of 
  the 
  feet. 
  

   Local 
  ; 
  under 
  seaweed, 
  Mississippi 
  Bay, 
  Yokohama. 
  

  

  Lithocharis 
  ochracea. 
  

   Pcederus 
  ochraeeus, 
  Grav. 
  Col. 
  Micr. 
  p. 
  59. 
  

  

  Mr. 
  Lewis 
  has 
  obtained 
  at 
  Nagasaki 
  and 
  Yokohama 
  a 
  few 
  

   individuals 
  which 
  I 
  think 
  belong 
  to 
  this 
  species; 
  unfortu- 
  

   nately 
  they 
  are 
  all 
  females, 
  and 
  the 
  determination 
  is 
  a 
  little 
  

   uncertain, 
  L. 
  parviceps 
  being 
  so 
  extremely 
  like 
  this 
  species 
  

   that 
  the 
  two 
  can 
  only 
  be 
  certainly 
  distinguished 
  by 
  the 
  male 
  

   characters. 
  

  

  L 
  ith 
  ocharis 
  diss 
  im 
  His. 
  

  

  Lithocharis 
  dissimilis, 
  Sharp, 
  Trans. 
  Eut. 
  Soc. 
  Loud. 
  1874, 
  p. 
  6G. 
  

  

  This 
  species 
  has 
  not 
  been 
  found 
  again 
  ; 
  there 
  is 
  little 
  doubt 
  

   that 
  it 
  will 
  form 
  a 
  new 
  genus 
  near 
  Scioporus, 
  but 
  it 
  would 
  be 
  

   scarcely 
  possible 
  to 
  ascertain 
  the 
  characters 
  sufficiently 
  with- 
  

   out 
  too 
  great 
  a 
  manipulation 
  of 
  the 
  unique 
  example. 
  

  

  [To 
  bo 
  continued.] 
  

  

  XXVI. 
  — 
  Notes 
  on 
  the 
  Genus 
  Melapium, 
  II. 
  and 
  A. 
  Adams. 
  

   By 
  Edgar 
  A. 
  Smith. 
  

  

  This 
  genus 
  of 
  Mollusca 
  was 
  founded 
  by 
  Messrs. 
  H. 
  and 
  A. 
  

   Adams 
  * 
  for 
  the 
  reception 
  of 
  the 
  Pyrula 
  lineata 
  of 
  Lamarck, 
  

   a 
  species 
  which 
  appeared 
  to 
  them, 
  even 
  on 
  conchological 
  

   grounds 
  alone, 
  generically 
  distinct 
  from 
  Pyrula. 
  An 
  exami- 
  

   nation 
  of 
  the 
  animal, 
  which 
  1 
  have 
  been 
  able 
  to 
  make 
  through 
  

   the 
  kindness 
  of 
  Mr. 
  J. 
  H. 
  Ponsonby, 
  confirms 
  the 
  correctness 
  

   of 
  their 
  judgment. 
  The 
  animal 
  may 
  be 
  described 
  thus 
  : 
  — 
  

  

  Foot 
  oval, 
  rather 
  high, 
  not 
  truncate 
  or 
  biemarginate 
  in 
  front, 
  

   in 
  length 
  about 
  one 
  and 
  a 
  half 
  times 
  the 
  width, 
  pale 
  beneath, 
  

   bordered 
  all 
  round 
  above 
  the 
  margin 
  with 
  two 
  bright 
  red 
  lines 
  

   about 
  2 
  millim. 
  apart. 
  Head 
  small, 
  compressed. 
  Tentacles 
  

   5 
  or 
  6 
  millim. 
  long, 
  acutely 
  tapering. 
  Eyes 
  minute, 
  at 
  outer 
  

   base 
  of 
  tentacles, 
  on 
  slight 
  prominences. 
  Penis 
  compressed, 
  

   10 
  to 
  12 
  millim. 
  in 
  length, 
  obtuse 
  at 
  the 
  end. 
  Siphon 
  

   shortish, 
  moderately 
  acuminate. 
  Branchial 
  in 
  two 
  plumes, 
  the 
  

   * 
  Genera 
  Moll. 
  vol. 
  i. 
  p. 
  130. 
  

  

  