﻿798 
  REPORT 
  OF 
  COMMISSIONER 
  OP 
  FISH 
  AND 
  FISHERIES. 
  f 
  1 
  J 
  

  

  Family 
  XVL— 
  RHINODONTID^. 
  . 
  (13) 
  

  

  30.— 
  MICRISTODUS 
  Gill. 
  (30) 
  

  

  54. 
  Micristodus 
  ptmctatus 
  Gill. 
  P. 
  (40) 
  

  

  Family 
  XVII.— 
  SQUATINID^. 
  (1C) 
  

   31.— 
  SQUATINA 
  Dum&ril. 
  (33) 
  

  

  55. 
  Squatina 
  squatina 
  ' 
  Linnaeus. 
  C. 
  N. 
  Eu. 
  (43) 
  

  

  Order 
  G.— 
  RAL3E. 
  (E) 
  

   Family 
  XVin.— 
  PBISTIDIDiE. 
  (17) 
  

  

  32.— 
  PRISTIS. 
  Latham. 
  (34) 
  

  

  56. 
  Pristis 
  pectinatus 
  Latham. 
  W. 
  S. 
  (44) 
  

  

  57. 
  Pristis 
  perrottetii 
  2 
  Miiller 
  & 
  Henle. 
  P. 
  

  

  Family 
  XIX.— 
  RHINOBATID^. 
  (18) 
  

  

  33.— 
  RHINOBATUS 
  Bloch 
  & 
  Schneider. 
  (35) 
  

   § 
  Rhinobatus. 
  

  

  58. 
  Rhinobatus 
  productus 
  Ayres. 
  C. 
  (45) 
  

  

  59. 
  Rhinobatus 
  glaucostigma 
  3 
  Jordan 
  & 
  Gilbert. 
  P. 
  

  

  60. 
  Rhinobatus 
  lengtiginosus 
  Garman. 
  W. 
  (45d) 
  

  

  § 
  Zapieryx. 
  Jordan 
  & 
  Gilbert. 
  

  

  61. 
  Rhinobatus 
  exasperatus 
  Jordan 
  & 
  Gilbert. 
  C. 
  P. 
  (45*) 
  

  

  $ 
  Platyrhinoidis. 
  Garman. 
  

  

  62. 
  Rhinobatus 
  triseriatus 
  Jordan 
  & 
  Gilbert. 
  C. 
  (45c) 
  

  

  'Our 
  reasons 
  for 
  retaining 
  the 
  original 
  specific 
  name, 
  even 
  when 
  identical 
  with 
  the 
  

   name 
  of 
  the 
  genus, 
  have 
  been 
  given 
  in 
  full 
  in 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  1884, 
  18. 
  Tho 
  

   same 
  view 
  of 
  the 
  case 
  has 
  been 
  adopted 
  by 
  the 
  American 
  Ornithologists' 
  Union. 
  

  

  2 
  Pristis 
  perrolteti 
  Miiller 
  & 
  Henle. 
  Rostral 
  teeth 
  in 
  18 
  or 
  20 
  pairs, 
  not 
  trenchant 
  

   behind 
  ; 
  distant 
  from 
  one 
  another, 
  the 
  base 
  of 
  each 
  tooth 
  being 
  about 
  one-third 
  the 
  

   interspaces. 
  Dorsal 
  fin 
  nearly 
  in 
  advance 
  of 
  ventrals. 
  Root 
  of 
  pectoral 
  in 
  advance 
  

   of 
  first 
  gill-opening, 
  its 
  outer 
  angle 
  a 
  right 
  one. 
  Second 
  dorsal 
  not 
  much 
  smaller 
  

   than 
  first 
  ; 
  a 
  smaller 
  lower 
  caudal 
  lobe. 
  (Giinther.) 
  Tropical 
  seas, 
  north 
  to 
  Mazatlau, 
  

   on 
  the 
  Pacific 
  coast. 
  

  

  (Miiller 
  & 
  Henle, 
  108; 
  GUnther, 
  VIII, 
  43G 
  ; 
  Jordan 
  & 
  Gilbert, 
  Bull. 
  U. 
  S. 
  Nat. 
  

   Mus., 
  1882, 
  105.) 
  

  

  ^Rhinobatus 
  glaucostigma 
  Jordan 
  & 
  Gilbert, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  1883, 
  210. 
  

   Mazatlan 
  : 
  Gulf 
  of 
  California. 
  

  

  