﻿816 
  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  [28] 
  

  

  320 
  c. 
  lihinichtliys 
  cataraclcc 
  iransmonlanus 
  Copo. 
  R. 
  (315) 
  

  

  321. 
  Rhinichthys 
  atronasus 
  Mitcbill. 
  Vn. 
  (810, 
  317) 
  

  

  86.— 
  AGOSIA 
  Girard. 
  (90) 
  

   § 
  Agosia. 
  

  

  322. 
  Agosia 
  chrysogaster 
  Girard. 
  R. 
  (318) 
  

  

  323. 
  Agosia 
  metallica 
  Girard. 
  R. 
  (319) 
  

  

  324. 
  Agosia 
  novemradiata 
  1 
  Cope. 
  R. 
  

  

  § 
  Apocope 
  Cope. 
  (91) 
  

  

  325. 
  Agosia 
  carringtoni 
  Cope. 
  R. 
  (320) 
  

  

  326. 
  Agosia 
  nubila 
  2 
  Girard. 
  R. 
  (321,322,323,324) 
  

  

  327. 
  Agosia 
  oscula 
  3 
  Girard. 
  R. 
  (325) 
  

  

  87.— 
  HYBOPSIS 
  4 
  Agassiz 
  (92) 
  

   § 
  Nocomis 
  Girard. 
  

  

  328. 
  Hybopsis 
  biguttatus' 
  Kirtland. 
  V. 
  (325, 
  327) 
  

  

  § 
  Hybopsis. 
  

  

  329. 
  Hybopsis 
  cumiugi 
  Giinther. 
  T. 
  ? 
  (329) 
  

  

  330. 
  Hybopsis 
  storerianus 
  11 
  Kirtland. 
  Vw. 
  (330) 
  

  

  recoguized. 
  E. 
  fransmonianus 
  represents 
  a 
  tangiblo 
  variety, 
  occurring 
  west 
  of 
  the 
  

   Rocky 
  Mountains 
  and 
  having 
  a 
  greater 
  number 
  of 
  scales 
  below 
  the 
  lateral 
  line 
  than 
  

   I 
  have 
  ever 
  seen 
  iu 
  It..cataractCB. 
  Eh. 
  dulcis 
  has 
  the 
  snout 
  shorter 
  and 
  blunter 
  than 
  

   usual 
  in 
  cataractce, 
  projecting 
  little 
  beyond 
  the 
  mouth. 
  Garman's 
  review 
  of 
  this 
  genus 
  

   (Science 
  Observer, 
  1881, 
  57) 
  seems 
  to 
  me 
  worse 
  than 
  useless. 
  

  

  1 
  Agosia 
  novemradiata 
  Cope, 
  Proc. 
  Ac. 
  Nat. 
  Sci. 
  Phila., 
  1883, 
  141. 
  Silvery, 
  dusted 
  

   with 
  smoky 
  above 
  and 
  marked 
  on 
  sides 
  with 
  several 
  rows 
  of 
  dusky 
  spots; 
  bases 
  of 
  

   lower 
  fins 
  and 
  upper 
  lip 
  red; 
  head 
  elongate, 
  especially 
  the 
  muzzle, 
  which 
  projects 
  

   a 
  little; 
  eye 
  41 
  in 
  head, 
  1| 
  in 
  muzzle, 
  and 
  in 
  interorbital 
  width 
  ; 
  dorsal 
  inserted 
  be- 
  

   hind 
  ventrals 
  ; 
  caudal 
  peduncle 
  ratber 
  deep 
  ; 
  head 
  4 
  ; 
  depth 
  5; 
  D. 
  always 
  1, 
  9 
  ; 
  A. 
  1, 
  

   7; 
  scales 
  11-60-11. 
  Weber 
  River, 
  at 
  Echo, 
  Utah. 
  (Cope.) 
  

  

  2 
  On 
  comparison 
  of 
  many 
  examples, 
  including 
  the 
  original 
  types 
  oi 
  Apocope 
  nubila, 
  

   vulncrata, 
  and 
  heushavii, 
  I 
  am 
  unable 
  to 
  appreciate 
  any 
  permanent 
  specific 
  distinctions. 
  

   The 
  genus 
  Apocope 
  is 
  scarcely 
  distinct 
  from 
  Agosia. 
  

  

  3 
  Argyreus 
  osculus 
  Girard 
  = 
  Argyrcus 
  notabilis 
  Girard 
  = 
  Apocope 
  venlricosa 
  Cope. 
  This 
  

   species 
  differs 
  from 
  A. 
  nubila 
  chiefly 
  in 
  the 
  much 
  smaller 
  size 
  of 
  the 
  scales. 
  The 
  orig- 
  

   inal 
  type 
  of 
  A. 
  osculus 
  has 
  90 
  scales 
  in 
  the 
  lateral 
  lino, 
  which 
  is 
  nearly 
  complete. 
  

  

  4 
  There 
  is 
  little 
  doubt 
  of 
  the 
  identity 
  of 
  Hybopsis 
  gracilis 
  Agassiz 
  with 
  Ceratichthya 
  

   amblops. 
  The 
  name 
  Hybopsis 
  is 
  therefore 
  prior 
  both 
  to 
  Nocomis 
  and 
  Ceratichthys 
  as 
  the 
  

   designation 
  of 
  this 
  genus. 
  

  

  5 
  Ceratichthys 
  micropogon 
  Cope 
  is 
  probably 
  based 
  on 
  an 
  abnormal 
  individual 
  of 
  H. 
  

   biguttatus. 
  

  

  6 
  Eutilus 
  storerianus 
  Kirtland 
  = 
  Ceratichthys 
  lucens 
  Jordan. 
  By 
  a 
  curious 
  mistake, 
  

   Kirtland's 
  species 
  has 
  been 
  confounded 
  by 
  several 
  recent 
  writers 
  with 
  Notropis 
  amarus, 
  

   a 
  species 
  similar 
  in 
  appearance 
  but 
  lacking 
  barbels. 
  This 
  handsome 
  species 
  reaches 
  

   a 
  length 
  of 
  10 
  inches 
  and 
  is 
  abundant 
  in 
  the 
  lakes 
  aud 
  river 
  channels 
  of 
  the 
  Missis- 
  

   sippi 
  Valley 
  and 
  the 
  lake 
  region. 
  The 
  teeth 
  are 
  usually 
  1, 
  4-4, 
  0. 
  

  

  