﻿114 
  

  

  more 
  like 
  a 
  spot, 
  oa 
  tbo 
  poduacb 
  of 
  the 
  tail. 
  Iris 
  reddish- 
  

   browu, 
  with 
  a 
  vertical 
  bar 
  of 
  brown. 
  A 
  large 
  and 
  subcircu- 
  

   hir 
  black 
  patch 
  is 
  observed 
  at 
  the 
  upper 
  angle 
  of 
  the 
  opercu- 
  

   kim, 
  extending 
  over 
  the 
  gill-flap, 
  upon 
  which 
  a 
  double 
  

   crescent 
  is 
  seen 
  ; 
  this 
  is 
  golden 
  at 
  the 
  base, 
  with 
  a 
  liorizontal 
  

   blue 
  or 
  golden 
  line 
  below. 
  Length, 
  3 
  to 
  4 
  inches. 
  

  

  Fin-rajs 
  :-D. 
  9, 
  11 
  ; 
  P. 
  11 
  ; 
  Y. 
  1, 
  5 
  ; 
  A. 
  3, 
  11 
  ; 
  C. 
  17. 
  

  

  Pomotis 
  obesus, 
  Girard 
  Proc. 
  Bost. 
  Soc. 
  Nat. 
  Hist. 
  V, 
  1854, 
  

   p. 
  40 
  ; 
  Baird, 
  Smiths. 
  Eep. 
  IX, 
  p. 
  324. 
  

  

  This 
  pretty 
  little 
  Sun-fish 
  is 
  very 
  common 
  in 
  the 
  dark-col- 
  

   ored 
  streams 
  of 
  Worcester 
  county. 
  Though 
  confining 
  itself 
  

   usually 
  to 
  the 
  muddy 
  creeks, 
  it 
  is 
  often 
  found 
  in 
  clear 
  water, 
  

   but 
  in 
  sueli 
  case, 
  frequents 
  only 
  such 
  places 
  where 
  the 
  differ- 
  

   ent 
  water-plants 
  grow 
  very 
  luxuriantly. 
  

  

  EnneacantJins 
  chcetodon, 
  Baird, 
  and 
  E. 
  margarotiSf 
  Jord., 
  

   occur 
  in 
  similar 
  places; 
  the 
  little 
  Mud-fish, 
  Umbra 
  pygmcea, 
  

   (DeKay), 
  Bean., 
  frequents 
  also 
  those 
  dark, 
  sluggish 
  or 
  stag- 
  

   nant 
  streams, 
  burrowing 
  into 
  the 
  mud. 
  

  

  Acad. 
  Collection. 
  

  

  XXXIIIa— 
  ETHEOSTOMATA, 
  Agass, 
  

  

  BOLEICHTHYS. 
  

   Ti. 
  erochrous. 
  

  

  Mud-Loving 
  Darter. 
  

  

  The 
  length 
  from 
  the 
  opercie 
  to 
  the 
  tip 
  of 
  the 
  tail 
  is 
  ecjual 
  

   to 
  4 
  heads 
  ; 
  the 
  greatest 
  elevation 
  without 
  the 
  dorsal 
  fin 
  is 
  

   three-fourths 
  of 
  the 
  head. 
  This 
  small 
  fish 
  has 
  an 
  elongated, 
  

   slender 
  and 
  compressed 
  body, 
  which 
  is 
  thicker 
  below 
  than 
  

   above. 
  The 
  head 
  is 
  small, 
  short, 
  compressed, 
  narrow 
  between 
  

   the 
  eyes, 
  with 
  a 
  rounded 
  and 
  full 
  snout, 
  though 
  not 
  so 
  broad 
  as 
  

   the 
  occiput 
  ; 
  it 
  is 
  smooth 
  above, 
  though 
  covered 
  with 
  scales 
  on 
  

   the 
  sides. 
  The 
  eye 
  is 
  very 
  large, 
  and 
  is 
  placed 
  half 
  the 
  diame- 
  

   ter 
  of 
  its 
  orbit 
  from 
  the 
  snout, 
  and 
  two 
  diameters 
  from 
  the 
  angle 
  

  

  