﻿[117] 
  CATALOGUE 
  OF 
  THE 
  FISHES 
  OF 
  NORTH 
  AMERICA. 
  905 
  

  

  Family 
  CXXXI.— 
  TBICHODONTLMJ. 
  (102 
  &.) 
  

  

  462.— 
  TRICHODON 
  Steller. 
  (337) 
  

  

  1422. 
  Trichodon 
  trichodon 
  Tilesius. 
  A. 
  (975) 
  

  

  1423. 
  Trichodon 
  japonicus 
  1 
  Steiudachner. 
  A. 
  

  

  Family 
  CXXXIL— 
  LEPTOSCOPIDJE. 
  (113) 
  

  

  463.— 
  DACTYLOSCOPUS 
  Gill. 
  (400) 
  

  

  1424. 
  Dactyloscopus 
  mundus 
  a 
  Gill. 
  P. 
  

  

  1425. 
  Dactyloscopus 
  pectoralis 
  3 
  Gill. 
  P. 
  

  

  1426. 
  Dactyloscopus 
  tridigitatus 
  Gill. 
  W. 
  (1151) 
  

  

  464.— 
  MYXODAGNUS 
  * 
  Gill. 
  

  

  1427. 
  Myxodagnus 
  opercularis 
  Gill. 
  P. 
  

  

  Family 
  OXXXIII.— 
  UEAXOSCOPLD^. 
  (103) 
  

  

  465.— 
  UPSILONFHORUS 
  6 
  Gill. 
  (338) 
  

  

  1428. 
  TJpsilonphorus 
  y-graecum 
  Cuv. 
  & 
  Val. 
  S. 
  (976) 
  

  

  1429. 
  Upsilonphorus 
  guttatus 
  Abbott. 
  N. 
  S. 
  (977; 
  

  

  1 
  Trichodon 
  japonicus 
  Steiudachner. 
  

  

  Form 
  of 
  body 
  and 
  coloration 
  of 
  T. 
  trichodon. 
  First 
  dorsal 
  high, 
  triangular, 
  formed 
  

   of 
  ten 
  slender 
  spines, 
  and 
  separated 
  by 
  a 
  long 
  interval 
  from 
  the 
  second 
  dorsal. 
  Pre- 
  

   opercle 
  with 
  five 
  sharp 
  spines 
  ; 
  the 
  two 
  spines 
  on 
  the 
  preorbital 
  very 
  small. 
  Pectoral 
  

   well 
  developed, 
  all 
  its 
  rays 
  simple, 
  the 
  lower 
  a 
  little 
  thickened 
  ; 
  the 
  fin 
  considerably 
  

   longer 
  than 
  the 
  head 
  and 
  reaching 
  past 
  the 
  last 
  spine 
  of 
  the 
  dorsal. 
  Anal 
  fin 
  with 
  

   its 
  rays 
  gradually 
  longer 
  posteriorly. 
  Dentition 
  as 
  in 
  T. 
  trichodon, 
  the 
  mouth 
  rather 
  

   more 
  oblique 
  than 
  in 
  the 
  latter. 
  Head 
  3| 
  : 
  depth 
  3f 
  . 
  D. 
  X-13 
  ; 
  A. 
  31 
  ; 
  P. 
  25 
  ; 
  L. 
  4$ 
  

   inches. 
  Strietok, 
  in 
  the 
  sea 
  of 
  Japan, 
  and 
  Sitka, 
  Alaska 
  (Steindachner). 
  

  

  (Steindachner, 
  Ichth., 
  Beitr., 
  X, 
  4, 
  1881.) 
  

  

  2 
  Dactylagnus 
  mundus 
  Gill, 
  Proc. 
  Ac. 
  Nat. 
  Sci. 
  Phila., 
  1862, 
  505. 
  Jordan 
  & 
  Gilbert, 
  

   Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  1882, 
  628. 
  Cape 
  San 
  Lucas 
  to 
  Panama. 
  

  

  We 
  find 
  very 
  small 
  pseudobranchiae 
  present 
  in 
  living 
  examples 
  of 
  Dactyloscopus 
  

   tridigitatus. 
  Probably 
  none 
  of 
  the 
  family 
  are 
  wholly 
  destitute 
  of 
  these 
  organs. 
  

  

  3 
  Dactyloscopus 
  pectoralis 
  Gill, 
  Proc. 
  Ac. 
  Nat. 
  Sci. 
  Phila., 
  1861,267. 
  Cape 
  San 
  Lucas. 
  

  

  * 
  Myxodagnus 
  Gill. 
  

  

  (Gill, 
  Proc. 
  Ac. 
  Nat. 
  Sci. 
  Phila., 
  1861, 
  269, 
  270 
  ; 
  type 
  Myxodagnus 
  opercularis 
  Gill.) 
  

  

  This 
  genus 
  differs 
  from 
  Dactyloscopus 
  in 
  the 
  form 
  of 
  the 
  head, 
  which 
  is 
  elongate- 
  

   conoid, 
  the 
  lower 
  jaw 
  obtusely 
  pointed 
  and 
  provided 
  with 
  a 
  short 
  flap 
  in 
  front. 
  The 
  

   pseudobranchige 
  are 
  well 
  devt 
  loped 
  and 
  the 
  dorsal 
  fin 
  commences 
  far 
  behind 
  the 
  nape. 
  

   One 
  species 
  known. 
  (Myxodes, 
  a 
  genus 
  of 
  blennies 
  ; 
  ayvoi, 
  an 
  old 
  name 
  of 
  Uranoscopus 
  

   scaber.) 
  Myxodagnus 
  opercularis 
  Gill, 
  1. 
  c, 
  270. 
  Cape 
  San 
  Lucas. 
  

  

  8 
  Instead 
  of 
  genus 
  Astroscopus 
  as 
  given 
  in 
  the 
  Synopsis 
  (p. 
  627) 
  read: 
  

  

  Upsilonphorus 
  Gill. 
  

  

  (Gill, 
  Proc 
  U. 
  S.Nat. 
  Mus., 
  1861,113; 
  type 
  Uranoscopus 
  y-gro3cum 
  Cuv. 
  & 
  Val.) 
  

  

  The 
  definition 
  of 
  Astroscopus 
  in 
  the 
  text 
  applies 
  entirely 
  to 
  this 
  genus. 
  (Tipt\ov 
  t 
  

   V) 
  cpopsoo, 
  to 
  bear. 
  ) 
  

  

  The 
  species 
  of 
  this 
  genus 
  should 
  stand 
  as: 
  

  

  Upsilonphorus 
  y-grcecum 
  (C. 
  & 
  V.) 
  Gill. 
  

  

  The 
  comparison 
  made 
  on 
  page 
  941 
  between 
  A. 
  y-gracum 
  and 
  A. 
  anoplus 
  should 
  be 
  

   suppressed, 
  as 
  the 
  specimens 
  there 
  called 
  anoplus 
  were 
  the 
  young 
  of 
  y-graecum, 
  and 
  

   the 
  differences 
  noted 
  are 
  the 
  changes 
  produced 
  by 
  age. 
  

  

  Upsilonphorus 
  guttatus 
  (Abbott) 
  Gill. 
  

  

  This 
  is 
  the 
  species 
  called 
  Astroscopus 
  anoplus 
  by 
  Bean 
  (Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  1879, 
  60) 
  

   and 
  by 
  us 
  in 
  the 
  text 
  on 
  page 
  629. 
  The 
  original 
  anoplus 
  is, 
  however, 
  very 
  different. 
  

  

  