﻿701 
  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  [6] 
  

  

  16.— 
  PSEUDOTRIACIS 
  « 
  Capello. 
  

  

  23. 
  Pseudotriacis 
  niicrodon 
  2 
  Capello. 
  P. 
  Eu. 
  

  

  17.— 
  GINGLYMOSTOMA 
  MUller 
  &. 
  Henle. 
  (13) 
  

  

  24. 
  Ginglymostoma 
  cirratum 
  Gmelin. 
  W. 
  P. 
  (18) 
  

  

  Family 
  X.— 
  GALEORHINID^. 
  (7) 
  

  

  18.— 
  GALEUS 
  3 
  (Rafinesque) 
  Leach. 
  (14) 
  

   J 
  Galeus. 
  

  

  25. 
  Galeus 
  lunulatus 
  4 
  Jordan 
  &. 
  Gilbert. 
  P. 
  

  

  1 
  Pseudotriacis 
  Capello. 
  (Pseudotriakis 
  Capello, 
  Join. 
  Sci. 
  Math. 
  Phys. 
  e 
  Nat. 
  

   Lisboa, 
  18G8, 
  321 
  ; 
  type 
  Pseudotriakis 
  microdon 
  Capello.) 
  

  

  Body 
  elongate; 
  mouth 
  wide, 
  with 
  a 
  very 
  short 
  labial 
  fold 
  near 
  the 
  angle; 
  snout 
  

   depressed; 
  nostrils 
  inferior, 
  not 
  confluent 
  with 
  the 
  mouth; 
  eyes 
  oblong, 
  lateral, 
  

   without 
  nictitating 
  membrane 
  ; 
  spiracles 
  well 
  developed 
  behind 
  the 
  eye 
  ; 
  gill 
  openings 
  

   moderate, 
  in 
  advance 
  of 
  pectoral 
  ; 
  jaws 
  with 
  many 
  rows 
  of 
  very 
  small, 
  tricuspid 
  teeth 
  ; 
  

   first, 
  dorsal 
  fin 
  long 
  and 
  low, 
  highest 
  posteriorly, 
  inserted 
  opposite 
  the 
  space 
  between 
  

   pectorals 
  and 
  ventrals; 
  second 
  dorsal 
  rather 
  large, 
  larger 
  than 
  aual; 
  vontrals 
  and 
  

   pectorals 
  well 
  developed 
  ; 
  no 
  pit 
  at 
  root 
  of 
  caudal 
  ; 
  caudal 
  fin 
  divided 
  by 
  a 
  notch 
  into 
  

   a 
  short 
  upper 
  portion 
  and 
  a 
  very 
  low 
  and 
  long 
  lower 
  portion. 
  Skin 
  with 
  minute 
  as- 
  

   perities. 
  One 
  species 
  known 
  (WevdoS, 
  false; 
  rpsiauiS, 
  triads). 
  

  

  2 
  Pseudotriacis 
  microdon 
  Capello, 
  Joru. 
  Sci. 
  Math. 
  &c, 
  Lisboa, 
  1868, 
  321; 
  Gunther, 
  

   VIII, 
  395; 
  Bean, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mas., 
  VI, 
  1883, 
  147. 
  Two 
  specimens 
  of 
  this 
  spe- 
  

   cies 
  are 
  kuown, 
  the 
  typo 
  from 
  Portugal, 
  the 
  second, 
  10 
  feet 
  in 
  length, 
  lately 
  taken 
  

   at 
  Amagansett, 
  on 
  Long 
  Island. 
  (Bean.) 
  

  

  3 
  Galeus 
  Rafinesque. 
  (.Muselus 
  Cuvier.) 
  

  

  (Rafinesque, 
  Caratteri 
  di 
  alcuni 
  nuovi 
  Generi,1810, 
  13 
  : 
  vulpeculus, 
  melaslomus, 
  catu- 
  

   lus 
  and 
  mustelns 
  : 
  Galeus 
  Leach, 
  Observ. 
  Genus 
  Squalus 
  of 
  Linnc: 
  1812, 
  62, 
  type 
  

   Squalus 
  mustelns 
  Leach 
  = 
  AS^. 
  canis 
  Mitchill.) 
  

  

  The 
  name 
  Galeus 
  was 
  first 
  used 
  in 
  binomial 
  nomenclature 
  by 
  Rafinesque, 
  for 
  a 
  

   genus 
  thus 
  defined 
  : 
  

  

  "VIII. 
  G. 
  Galeus. 
  — 
  Due 
  spiragli, 
  due 
  ale 
  dorsali, 
  un 
  ala 
  auale, 
  cinque 
  branchie 
  

   da 
  ogni 
  lato 
  ; 
  coda 
  diseguale, 
  obliqua. 
  

  

  "Osservazionc. 
  La 
  maggior 
  parti 
  delli 
  Squali 
  degli 
  autori 
  si 
  annoverano 
  in 
  questo 
  

   genere, 
  il 
  quale 
  si 
  distingue 
  dal 
  vcro 
  genere 
  Squalus 
  della 
  prezenza 
  di 
  uu 
  ala 
  anale." 
  

  

  Four 
  species 
  are 
  mentioned, 
  rulpeculus 
  : 
  melastomus 
  : 
  catulus 
  and 
  mustelns. 
  Although 
  

   the 
  species 
  which 
  the 
  author 
  had 
  in 
  mind 
  was 
  probably 
  Squalus 
  galeus 
  L., 
  it 
  is 
  improper 
  

   to 
  assume 
  this 
  species 
  as 
  the 
  type, 
  as 
  no 
  mention 
  is 
  made 
  of 
  it 
  by 
  the 
  author 
  in 
  ques- 
  

   tion. 
  

  

  In 
  1812, 
  Leach 
  proposed 
  a 
  genus 
  Galeus, 
  to 
  include 
  sharks 
  with 
  the 
  anal 
  fin 
  present 
  

   and 
  the 
  caudal 
  fin 
  irregular 
  (i. 
  e., 
  not 
  lunate). 
  But 
  one 
  species, 
  Galeus 
  musielus, 
  is 
  

   mentioned 
  by 
  Leach. 
  Still 
  later, 
  a 
  subgenus, 
  Galeorhinus, 
  was 
  proposed 
  by 
  Blain- 
  

   ville 
  for 
  sharks 
  distinguished 
  from 
  Carcharinus 
  Blainv. 
  (=Carcharias 
  Cuvier), 
  by 
  tho 
  

   presence 
  of 
  spiracles. 
  Iu 
  this 
  group 
  are 
  included 
  with 
  others, 
  Squalus 
  musielus 
  and 
  

   Squalus 
  galeus 
  of 
  Linnams. 
  Still 
  later 
  (1817), 
  the 
  genera 
  Mustelns, 
  Carcharias, 
  and 
  

   Galeus 
  were 
  defined 
  by 
  Cuvier, 
  and 
  with 
  his 
  definition 
  have 
  been 
  accepted 
  by 
  nearly 
  

   all 
  later 
  authors. 
  

  

  Tho 
  rules 
  of 
  nomenclature 
  seem 
  to 
  me 
  to 
  require 
  the 
  retention 
  of 
  the 
  genus 
  Galeus 
  

   Rafinesque, 
  for 
  the 
  group 
  for 
  which 
  the 
  same 
  name 
  was 
  used 
  by 
  Leach, 
  i 
  e., 
  instead 
  of 
  

   Musielus 
  Cuvier. 
  

  

  4 
  Mnstclus 
  lunulatus 
  Jordan 
  <fc 
  Gilbert, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  1882, 
  108; 
  Mazatlan, 
  

   Mexico. 
  

  

  In 
  this 
  paper 
  is 
  given 
  an 
  analysis 
  of 
  the 
  distinctive 
  characters 
  of 
  tho 
  four 
  North 
  

   American 
  species 
  of 
  Galeus: 
  — 
  lunulatus, 
  canis, 
  dorsalis, 
  and 
  californicus. 
  

  

  