﻿68 
  Miscellaneous. 
  

  

  and 
  he 
  has 
  come 
  to 
  the 
  conclusion 
  that 
  the 
  Hersilians 
  constitute 
  a 
  

   new 
  family 
  equally 
  distinct 
  from 
  the 
  Siphon 
  ostomata 
  and 
  the 
  Pel- 
  

   tidians. 
  He 
  considers 
  that 
  in 
  the 
  ontogeny 
  of 
  the 
  most 
  diverse 
  

   types 
  the 
  first 
  rank 
  in 
  order 
  of 
  appearance 
  is 
  to 
  he 
  given 
  to 
  charac- 
  

   ters 
  drawn 
  from 
  the 
  huccal 
  appendages, 
  and 
  he 
  has 
  employed 
  these 
  

   characters 
  prominently 
  in 
  the 
  following 
  diagnoses 
  : 
  — 
  

  

  Family 
  Hersiliid^:. 
  

  

  Body 
  completely 
  segmented, 
  first 
  thoracic 
  somite 
  united 
  with 
  the 
  

   cephalic 
  segment. 
  Anterior 
  antennae 
  7-jointed, 
  similar 
  in 
  the 
  two 
  

   sexes. 
  Posterior 
  antennae 
  simple, 
  4-jointed. 
  Mandibles 
  without 
  

   palpi 
  or 
  masticatory 
  teeth, 
  furnished 
  at 
  their 
  distal 
  extremity 
  with 
  

   movable 
  accessory 
  pieces 
  in 
  the 
  form 
  of 
  a 
  solid 
  and 
  recurved 
  claw, 
  or 
  

   of 
  flattened 
  lamina? 
  with 
  the 
  margins 
  notched 
  and 
  denticulate, 
  or 
  of 
  

   bearded 
  setae. 
  Maxillae 
  rudimentary, 
  divided 
  into 
  an 
  inner 
  masti- 
  

   catory 
  lobe 
  and 
  an 
  external 
  palpiform 
  lobe. 
  Paragnathi 
  much 
  

   developed, 
  concealing 
  the 
  mandibles. 
  Thoracic 
  feet 
  biramose 
  and 
  

   with 
  triarticulate 
  rami 
  in 
  the 
  first 
  four 
  pairs 
  ; 
  simple 
  and 
  flattened 
  

   in 
  the 
  fifth. 
  

  

  * 
  Mandibles 
  having 
  at 
  their 
  distal 
  extremity 
  a 
  recurved 
  claw 
  

   and 
  

  

  A 
  . 
  Tiuo 
  accessory 
  pieces 
  : 
  — 
  

  

  1 
  . 
  Of 
  which 
  the 
  anterior 
  is 
  a 
  flattened 
  and 
  notched 
  lamina, 
  and 
  the 
  

  

  posterior 
  a 
  small 
  bearded 
  seta. 
  In 
  the 
  male 
  the 
  inner 
  maxilli- 
  

   pede 
  is 
  composed 
  of 
  two 
  joints 
  and 
  a 
  greatly 
  reduced 
  prehensile 
  

   extremity. 
  Genus 
  Hersilia, 
  Philippi. 
  

  

  One 
  species: 
  — 
  H. 
  apodiformis, 
  Phil. 
  (= 
  Glausidium 
  testudo, 
  

   Kossm.), 
  upon 
  the 
  carapace 
  of 
  Gallianassce 
  in 
  the 
  Mediterranean 
  

   and 
  Adriatic. 
  

  

  2. 
  Nearly 
  identical 
  and 
  in 
  the 
  form 
  of 
  flattened 
  denticulate 
  laminae. 
  

  

  The 
  inner 
  maxillipcde 
  of 
  the 
  male 
  contains, 
  besides 
  the 
  two 
  

   basal 
  joints, 
  a 
  long 
  recurved 
  claw. 
  Genus 
  Giardella, 
  Canu. 
  

  

  The 
  genus 
  is 
  dedicated 
  to 
  Prof. 
  A. 
  Giard. 
  There 
  is 
  one 
  species, 
  

   Giardella 
  Callianassce, 
  Canu, 
  which 
  is 
  abundant 
  in 
  the 
  galleries 
  of 
  

   Oallianassa 
  subterranea 
  in 
  the 
  sands 
  of 
  the 
  Pointe-des-Oies, 
  near 
  

   "Winiereux. 
  

  

  B. 
  Three 
  accessory 
  pieces, 
  of 
  which 
  the 
  anterior 
  is 
  a 
  long, 
  

   notched, 
  subtriangular 
  lamina, 
  and 
  the 
  others 
  two 
  long 
  

   bearded 
  and 
  flexible 
  setae. 
  Genus 
  Hersilioides, 
  Canu. 
  

  

  Three 
  species 
  : 
  — 
  

  

  1. 
  Hersilioides 
  Pelseneeri, 
  Canu, 
  found 
  in 
  the 
  tube 
  of 
  a 
  Clymenian 
  

   which 
  is 
  very 
  abundant 
  at 
  the 
  Pointe-des-Oies. 
  

  

  'J. 
  Hersilioides 
  Thomsoni, 
  Canu, 
  of 
  which 
  three 
  immature 
  ex- 
  

  

  