﻿296 
  Miscellaneous. 
  

  

  Skeleton 
  of 
  paired 
  fins.— 
  The 
  post-temporal 
  13 
  forked, 
  

   attached 
  to 
  the 
  epiotic 
  above 
  and 
  the 
  opisthotic 
  bilow; 
  the 
  

   hypercoracoid 
  is 
  perforate 
  and 
  the 
  hypocoracoid 
  is 
  narrowed 
  

   forward 
  below, 
  meeting 
  the 
  clei 
  thrum 
  at 
  or 
  above 
  the 
  sym- 
  

   physis 
  ; 
  there 
  is 
  no 
  mesocoracoid 
  ; 
  there 
  are 
  4 
  hourglass- 
  

   shaped 
  radials, 
  only 
  the 
  lowest 
  on 
  the 
  hypocoracoid 
  ; 
  the 
  

   post-cleithruni 
  is 
  single, 
  laminar 
  above, 
  and 
  slender 
  and 
  rod- 
  

   like 
  below 
  ; 
  the 
  pelvic 
  bones 
  are 
  connected 
  with 
  the 
  post- 
  

   cleithra 
  ; 
  they 
  are 
  formed 
  of 
  transverse 
  portions 
  which 
  

   broadly 
  overlap 
  and 
  are 
  united, 
  and 
  of 
  rather 
  slender 
  pro- 
  

   cesses 
  which 
  converge 
  anteriorly 
  (fig. 
  A). 
  

  

  Two 
  families 
  may 
  be 
  recognized 
  : 
  — 
  

  

  1. 
  Percopsidse. 
  

  

  An 
  adipose 
  fin. 
  Caudal 
  of 
  19 
  principal 
  rays, 
  17 
  branched 
  ; 
  

   pel 
  vies 
  8-rayed. 
  Vent 
  just 
  in 
  front 
  of 
  anal 
  fin. 
  Palate 
  

   toothless. 
  Vertebrae 
  34 
  to 
  36 
  (16-17 
  + 
  17-19). 
  

  

  Two 
  genera 
  : 
  Percopsis 
  and 
  Columbia. 
  

  

  2. 
  Aphredoderidae. 
  

  

  No 
  adipose 
  fin. 
  Caudal 
  of 
  18 
  principal 
  rays, 
  16 
  branched 
  ; 
  

   pelvics 
  7-raved. 
  Vent 
  at 
  the 
  throat 
  (in 
  the 
  adult). 
  Teeth 
  

   ou 
  vomer 
  and 
  palatines. 
  Vertebra? 
  30 
  (13 
  + 
  17). 
  

  

  A 
  single 
  genus 
  : 
  Aphredoderus. 
  

  

  Jordan 
  and 
  Evermann 
  (Bull. 
  U.S. 
  Nat. 
  Mus. 
  xlvii. 
  1 
  S96, 
  

   pp. 
  782-786) 
  recognize 
  to 
  a 
  certain 
  extent 
  the 
  relationship 
  

   between 
  these 
  two 
  families, 
  but 
  make 
  each 
  the 
  type 
  of 
  a 
  

   separate 
  order 
  ; 
  their 
  idea 
  that 
  these 
  fishes 
  may 
  be 
  rather 
  

   closely 
  related 
  to 
  the 
  Percoid 
  families 
  Percidee 
  and 
  Centrarch- 
  

   idae 
  is 
  not 
  confirmed 
  by 
  a 
  study 
  of 
  the 
  anatomy. 
  Boulenger, 
  

   in 
  the 
  'Cambridge 
  Natural 
  History' 
  (1904), 
  includes 
  the 
  

   Percopsidse 
  in 
  the 
  heterogeneous 
  group 
  Haplomi, 
  whilst 
  

   Apliredoderus 
  is 
  placed 
  in 
  the 
  Berycidae. 
  Starks 
  (Proc. 
  U.S. 
  

   Nat. 
  Mus. 
  xxvii. 
  1904, 
  p. 
  603) 
  has 
  noted 
  some 
  of 
  the 
  cha- 
  

   racters 
  which 
  separate 
  Aphredoderus 
  from 
  the 
  Berycoids. 
  

  

  MISCELLANEOUS. 
  

  

  lioyal 
  Institution. 
  

  

  Pkofessor 
  Karl 
  Pkarson 
  being 
  unable 
  to 
  lecture 
  at 
  the 
  lioyal 
  

   Institution 
  on 
  March 
  3, 
  the 
  Friday 
  Evening 
  Discourse 
  on 
  that 
  date 
  

   will 
  be 
  delivered 
  by 
  Dr. 
  F. 
  A. 
  Dixev, 
  his 
  subject 
  being 
  " 
  Scents 
  of 
  

   Butterflies." 
  

  

  