﻿NO. 
  1948. 
  XEW 
  BROTULID 
  AND 
  CARAPID 
  FISHES— 
  RADGLIFFE. 
  175 
  

  

  coeca 
  absent; 
  lateral 
  line 
  indistinguishable; 
  scales 
  small, 
  cycloid, 
  

   deciduous, 
  about 
  22 
  from 
  origin 
  of 
  anal 
  to 
  dorsal. 
  

  

  Dorsal 
  and 
  anal 
  continuous 
  with 
  the 
  caudal; 
  origin 
  of 
  dorsal 
  from 
  

   tip 
  of 
  snout 
  4.10 
  in 
  total 
  length; 
  caudal 
  very 
  long 
  and 
  narrow 
  (broken 
  

   in 
  the 
  type); 
  origin 
  of 
  anal 
  from 
  tip 
  of 
  snout 
  2.67; 
  ventrals 
  absent; 
  

   pectoral 
  2.07, 
  longer 
  than 
  snout 
  plus 
  eye. 
  

  

  Color 
  in 
  alcohol: 
  Body 
  russet, 
  becoming 
  dusky 
  black 
  on 
  belly; 
  

   the 
  thin 
  outer 
  skin 
  of 
  head 
  and 
  fins 
  clove 
  brown 
  ; 
  mside 
  of 
  gill-chamber 
  

   and 
  peritoneum 
  dark 
  clove 
  brown. 
  

  

  Type.— 
  C&t. 
  No. 
  74154, 
  U.S.N.M., 
  about 
  28 
  cm. 
  in 
  length, 
  taken 
  

   with 
  a 
  beam 
  trawl 
  at 
  station 
  5647 
  (lat. 
  5° 
  34' 
  00" 
  S.; 
  long. 
  122° 
  18' 
  

   15" 
  E.), 
  in 
  Buton 
  Strait, 
  at 
  a 
  depth 
  of 
  519 
  fathoms, 
  on 
  a 
  bottom 
  of 
  

   green 
  mud. 
  

  

  This 
  species 
  appears 
  to 
  be 
  distinct 
  from 
  the 
  poorly 
  described 
  and 
  

   figured 
  H. 
  simum 
  of 
  Alcock. 
  

  

  Family 
  CARAPID^. 
  

  

  The 
  tyiDcs 
  of 
  Snyderidia 
  Gilbert 
  and 
  Pyramodon 
  Qierein 
  described) 
  

   appear 
  to 
  have 
  more 
  characters 
  in 
  common 
  with 
  Carapus 
  Rafinesque 
  

   than 
  with 
  the 
  type 
  of 
  Lycodapus 
  Gilbert, 
  and 
  in 
  our 
  opinion 
  belong 
  in 
  

   this 
  family. 
  

  

  PYRAMODON 
  Smith 
  and 
  Radeliffe, 
  new 
  genus. 
  

  

  This 
  genus 
  is 
  distinguished 
  from 
  Snyderidia 
  by 
  the 
  presence 
  of 
  

   ventral 
  fdaments; 
  by 
  the 
  position 
  of 
  the 
  vent 
  and 
  the 
  origin 
  of 
  anal, 
  

   which 
  are 
  farther 
  cephalad 
  under 
  anterior 
  dorsal 
  rays, 
  slightly 
  behind 
  

   vertical 
  from 
  axil 
  of 
  pectoral; 
  by 
  the 
  shorter 
  and 
  deeper 
  body; 
  and 
  

   by 
  the 
  larger, 
  more 
  nearly 
  horizontal 
  mouth. 
  

  

  The 
  type 
  of 
  EcModon 
  Thompson 
  is 
  slenderer, 
  more 
  elongate, 
  with- 
  

   out 
  ventral 
  filaments, 
  and 
  without 
  fang-like 
  canines 
  on 
  the 
  vomer. 
  

  

  Type 
  of 
  the 
  genus. 
  — 
  Pyramodon 
  ventralis, 
  new 
  species. 
  

  

  PYRAMODON 
  VENTRALIS 
  Smith 
  and 
  Radeliffe, 
  new 
  species. 
  

   Plate 
  17, 
  fig. 
  3. 
  

  

  Dorsal 
  about 
  140; 
  anal 
  about 
  140; 
  caudal 
  4; 
  ventrals 
  1; 
  pecto- 
  

   rals 
  26. 
  

  

  Head 
  6.43 
  in 
  total 
  length, 
  pointed, 
  compressed, 
  arched, 
  a 
  slight 
  

   concavity 
  in 
  upper 
  profile 
  above 
  eye, 
  posterior 
  line 
  of 
  occiput 
  midway 
  

   between 
  middle 
  of 
  eye 
  and 
  origin 
  of 
  dorsal; 
  body 
  deep, 
  compressed, 
  

   produced 
  into 
  a 
  long 
  slender 
  tail, 
  less 
  attenuated 
  than 
  in 
  Snyderidia 
  

   canina; 
  greatest 
  body 
  depth 
  6.76 
  in 
  total 
  length; 
  eye 
  4.84, 
  large, 
  

   subcircular; 
  snout 
  equal 
  to 
  eye, 
  low, 
  narrow, 
  laterally 
  convex; 
  

   mouth 
  large, 
  not 
  as 
  oblique 
  as 
  in 
  S. 
  canina, 
  upper 
  jaw 
  overlapping 
  

   lower 
  except 
  at 
  tip; 
  maxUlary 
  1.70, 
  extending 
  0.83 
  of 
  an 
  eye 
  diame- 
  

   ter 
  beyond 
  vertical 
  from 
  posterior 
  margin 
  of 
  eye, 
  channel 
  on 
  outer 
  

  

  