﻿58 
  THE 
  EXTINCT 
  BATRACHIA, 
  REPTILIA 
  

  

  Emmons 
  describes 
  a 
  species 
  Clepsysaurus 
  leaii, 
  from 
  the 
  coal 
  strata 
  of 
  Dan 
  River, 
  

   from 
  near 
  Leakesville, 
  N. 
  Ca., 
  which 
  appears 
  to 
  be 
  distinct 
  from 
  the 
  Rhytidodon 
  caro- 
  

   linensis. 
  It 
  is 
  represented 
  by 
  a 
  cast 
  of 
  a 
  block 
  of 
  sandstone 
  containing 
  14 
  vertebrae, 
  etc., 
  

   which 
  indicate 
  a 
  species 
  different 
  from 
  any 
  of 
  those 
  above 
  mentioned. 
  

  

  Finally, 
  although 
  the 
  Eurydorus 
  serridens, 
  Leidy, 
  from 
  its 
  locality 
  (Phcenixville, 
  

   Pennsylvania), 
  may 
  indicate 
  a 
  fifth 
  species, 
  there 
  is 
  nothing 
  in 
  the 
  type 
  specimen, 
  nor 
  in 
  

   the 
  description, 
  to 
  determinine 
  any 
  reference. 
  It 
  cannot 
  safely 
  be 
  regarded 
  as 
  the 
  same 
  

   as 
  the 
  Belodon 
  here 
  described, 
  from 
  the 
  same 
  locality, 
  since 
  the 
  strata 
  in 
  which 
  the 
  two 
  

   occur, 
  are 
  separated 
  by 
  a 
  vertical 
  thickness 
  of 
  187 
  feet 
  of 
  rock. 
  

  

  Having 
  satisfied 
  myself 
  of 
  the 
  existence 
  of 
  four 
  distinct 
  species 
  of 
  Belodonts 
  in 
  our 
  

   Triassic 
  beds, 
  their 
  generic 
  relations 
  come 
  next 
  in 
  order 
  for 
  consideration. 
  

  

  In 
  his 
  Manual 
  of 
  Geology, 
  Prof. 
  Emmons 
  figures 
  the 
  cranium 
  of 
  a 
  Reptile 
  (fig. 
  157, 
  

   page 
  179), 
  which 
  bears 
  a 
  near 
  resemblance 
  to 
  that 
  of 
  the 
  Belodon 
  plieningeri, 
  Meyer. 
  

   The 
  cast 
  of 
  this 
  cranium 
  in 
  the 
  Museum 
  of 
  the 
  Academy 
  Nat. 
  Sci., 
  confirms 
  the 
  reference 
  

   to 
  this 
  genus, 
  and 
  presents 
  no 
  characters 
  by 
  which 
  it 
  can 
  be 
  distinguished 
  from 
  it. 
  The 
  

   specimens 
  (No. 
  4) 
  consist 
  in 
  part 
  of 
  the 
  short 
  frontal 
  bones 
  with 
  part 
  of 
  the 
  orbits 
  and 
  

   cranial 
  cavity, 
  and 
  a 
  portion 
  of 
  the 
  ramus 
  of 
  the 
  mandible, 
  of 
  a 
  saurian 
  near 
  the 
  genus 
  

   Belodon, 
  perhaps 
  the 
  same. 
  The 
  ilium 
  figured 
  by 
  Emmons 
  (N. 
  Amer. 
  Geology, 
  p. 
  77, 
  

   fig. 
  47,) 
  and 
  the 
  femur, 
  (fig. 
  48), 
  with 
  portions 
  of 
  mandibular 
  ramus 
  (fig. 
  42), 
  obviously 
  

   indicate 
  Belodonts. 
  

  

  Of 
  the 
  Phcenixville 
  saurian, 
  portions 
  of 
  the 
  ilium 
  and 
  ischium 
  are 
  preserved, 
  which 
  

   indicate 
  that 
  the 
  animal 
  is 
  neither 
  a 
  Dinosaurian 
  nor 
  a 
  Dicynodont, 
  nor 
  yet 
  a 
  Crocodile. 
  

   The 
  portion 
  of 
  ilium 
  answers 
  to 
  that 
  of 
  Belodon, 
  as 
  figured 
  by 
  Meyer 
  and 
  Emmons. 
  

  

  The 
  Dan 
  River 
  species 
  is 
  referred 
  to 
  the 
  same 
  group 
  without 
  entire 
  certainty. 
  The 
  

   only 
  teeth 
  occurring 
  in 
  the 
  same 
  strata 
  are, 
  according 
  to 
  Emmons, 
  identical 
  with 
  those 
  of 
  

   the 
  smooth 
  toothed 
  Belodont 
  from 
  Deep 
  River. 
  The 
  cervical 
  vertebrae 
  are 
  quite 
  similar 
  

   to 
  those 
  of 
  the 
  Deep 
  River 
  species. 
  

  

  I 
  can 
  as 
  yet 
  find 
  no 
  generic 
  characters 
  by 
  which 
  to 
  distinguish 
  these 
  species 
  from 
  the 
  

   Belodon 
  of 
  Meyer, 
  neither 
  in 
  the 
  cranial, 
  dental, 
  pelvic 
  nor 
  extremital 
  regions. 
  Meyer 
  

   describes 
  and 
  figures 
  numerous 
  teeth, 
  both 
  smooth 
  and 
  silicate, 
  without 
  distinguishing 
  the 
  

   two 
  forms 
  specifically, 
  though 
  it 
  is 
  certain 
  that 
  three 
  species 
  of 
  the 
  genus 
  came 
  under 
  his 
  

   observation. 
  He 
  figures 
  ilia 
  of 
  two 
  species, 
  one 
  of 
  which 
  cannot 
  be 
  distinguished 
  gener- 
  

   ically 
  from 
  that 
  figured 
  by 
  Emmons 
  (1. 
  c. 
  fig. 
  47). 
  

  

  This 
  genus 
  was 
  referred 
  by 
  Owen 
  to 
  the 
  Thecodontia, 
  along 
  with 
  some 
  other 
  little 
  

   known 
  genera. 
  Some 
  of 
  the 
  latter, 
  especially 
  Bathygnathus 
  and 
  Clepsysaurus, 
  are 
  in 
  

   our 
  opinion 
  Dinosaurian, 
  while 
  others, 
  as 
  Belodon, 
  represent 
  a 
  family 
  of 
  the 
  present 
  order. 
  

  

  