﻿254 
  Bulletin 
  of 
  the 
  British 
  

  

  and 
  named 
  A. 
  hatvkinsi 
  (after 
  his 
  correspondent 
  who 
  had 
  

   brought 
  him 
  the 
  first 
  fragments 
  of 
  its 
  cranium) 
  , 
  he 
  was 
  now 
  

   inclined 
  to 
  place 
  in 
  a 
  new 
  genus_, 
  which 
  he 
  proposed 
  (at 
  the 
  

   suggestion 
  of 
  Prof. 
  A. 
  Newton^ 
  F.E-.S.) 
  to 
  call 
  Diaphorapteryx 
  

   (Sia^opo9=: 
  different). 
  Diapho7'apteryx 
  hawkinsi 
  belonged 
  to 
  

   the 
  Ocydromine 
  group 
  of 
  the 
  Rallidse, 
  and 
  was 
  nearly 
  related 
  

   not 
  only 
  to 
  Ocydromus 
  itself, 
  but 
  even 
  more 
  closely 
  to 
  Aphan- 
  

   apteryx 
  of 
  Mauritius. 
  It 
  appeared, 
  indeed, 
  to 
  be 
  nearer 
  to 
  

   Aphanapteryx 
  than 
  the 
  latter 
  genus 
  was 
  lo 
  Erythromachus 
  of 
  

   Rodriguez. 
  

  

  Erythromachus 
  differed 
  from 
  Diaphorapteryx 
  and 
  Aphan- 
  

   apteryx 
  in 
  the 
  greater 
  length 
  of 
  its 
  nasal 
  aperture, 
  which 
  was 
  

   less 
  than 
  one 
  third 
  of 
  the 
  length 
  of 
  the 
  beak 
  inDiaphorajAeryx. 
  

   The 
  latter 
  also 
  differed 
  from 
  both 
  these 
  genera 
  and 
  from 
  

   Ocydromus 
  in 
  the 
  large 
  protuberances 
  on 
  the 
  basi-temporal 
  

   region 
  of 
  the 
  skull 
  ; 
  and 
  from 
  Ocydromus 
  in 
  its 
  widely 
  sepa- 
  

   rated 
  palatine 
  bones, 
  which, 
  as 
  they 
  did 
  not 
  meet 
  posteriorly 
  

   in 
  the 
  middle 
  line, 
  disclosed 
  the 
  whole 
  of 
  the 
  post-vomerine 
  

   parasphenoidal 
  rostrum 
  as 
  seen 
  from 
  the 
  palatal 
  surface. 
  It 
  

   had 
  a 
  strong, 
  thick, 
  short 
  tarso-metatarsus, 
  shorter 
  than 
  the 
  

   metatarsus 
  as 
  figured 
  by 
  M. 
  Milne-Edwards 
  in 
  his 
  ' 
  Oiseaux 
  

   Possiles 
  de 
  France.^ 
  The 
  beak 
  was 
  highly 
  arched 
  — 
  as 
  in 
  

   Aphanapteryx 
  and 
  Erythromachus, 
  — 
  and 
  was 
  longer 
  than 
  

   the 
  tarso-metatarsus. 
  

  

  Palceocorax 
  moriorum. 
  — 
  This 
  species 
  of 
  the 
  Corvidse, 
  

   established 
  on 
  the 
  wing- 
  and 
  limb-bones, 
  had 
  been 
  originally 
  

   placed 
  in 
  the 
  genus 
  Corvus 
  {cf. 
  ' 
  Nature,^ 
  xlvi. 
  p. 
  252), 
  as 
  

   these 
  bones 
  presented 
  no 
  characters 
  distinguishing 
  them 
  from 
  

   those 
  of 
  the 
  most 
  typical 
  Crow. 
  The 
  cranium, 
  however, 
  

   differed 
  from 
  that 
  of 
  every 
  known 
  species 
  of 
  that 
  genus, 
  so 
  

   that 
  Mr. 
  Forbes 
  had 
  found 
  it 
  necessary 
  to 
  establish 
  a 
  new 
  

   genus, 
  Palceocorax, 
  for 
  its 
  reception. 
  

  

  There 
  were 
  present 
  minute 
  rudiments 
  of 
  the 
  basipterygoid 
  

   processes 
  on 
  the 
  parasphenoid. 
  The 
  vomer 
  was 
  broad, 
  flat, 
  

   three-pointed 
  in 
  front. 
  The 
  maxillaries 
  were 
  anchylosed 
  to 
  

   the 
  premaxillaries; 
  the 
  latter 
  were 
  anchylosed 
  to 
  the 
  expanded 
  

   ossified 
  base 
  of 
  the 
  nasal 
  septum. 
  The 
  ossified 
  mesethmoid 
  

   stretched 
  backward 
  and 
  was 
  lodged 
  in 
  the 
  concavity 
  of 
  the 
  

  

  