﻿14 
  SUPPLEMENT 
  TO 
  THE 
  EXTINCT 
  BATRACHJA 
  

  

  Measurements. 
  M. 
  

  

  Length 
  to 
  middle 
  of 
  supra-occipital, 
  .055 
  

  

  " 
  " 
  angle 
  of 
  quadrate, 
  .0711 
  

  

  Width 
  at 
  " 
  " 
  .069 
  

  

  " 
  " 
  orbits 
  (approximate), 
  .031 
  

  

  Interorbital 
  widlh, 
  .0085 
  

  

  No 
  teeth 
  are 
  preserved 
  with 
  this 
  cranium. 
  A 
  second 
  specimen 
  exhibits 
  nothing 
  more 
  distinctly 
  than 
  the 
  

   one 
  described. 
  

  

  TUDITANUS 
  OBTUSUS, 
  Cope. 
  

  

  Proceed. 
  Amer. 
  Philos. 
  Soc, 
  1871, 
  p. 
  177. 
  Bendrerpeton 
  obtusum, 
  Cope, 
  Transac. 
  Amer. 
  Philos. 
  Soc, 
  1889, 
  

   XIV., 
  p. 
  12. 
  

  

  TUDITANUS 
  MORDAX, 
  Cope, 
  Sp. 
  Nov. 
  

  

  Represented 
  by 
  a 
  partially 
  complete 
  cranium 
  and 
  some 
  other 
  fragments. 
  

  

  The 
  muzzle 
  is 
  broadly 
  rounded 
  as 
  in 
  T. 
  obtusus, 
  and 
  the 
  premaxillary 
  teeth 
  are 
  relatively 
  much 
  larger. 
  The 
  

   bones 
  are 
  sculptured 
  with 
  delicate 
  acute 
  radiating 
  and 
  inosculating 
  ridges. 
  The 
  maxillary 
  bone 
  is 
  preserved 
  for 
  the 
  

   length 
  of 
  an 
  inch 
  ; 
  its 
  teeth 
  are 
  smaller 
  than 
  those 
  of 
  the 
  premaxillary 
  bone 
  ; 
  I 
  count 
  four 
  in 
  a 
  line, 
  which 
  have 
  a 
  

   simple 
  conic 
  crown. 
  The 
  external 
  surface 
  of 
  the 
  maxillary 
  is 
  not 
  very 
  strongly 
  sculptured. 
  The 
  orbits 
  and 
  nares 
  

   are 
  not 
  well 
  defined 
  in 
  the 
  specimen. 
  

  

  TUDITANUS 
  HUXLEYI, 
  Cope, 
  Sp. 
  Noo. 
  

  

  Represented 
  by 
  a 
  considerable 
  portion 
  of 
  the 
  face 
  and 
  muzzle 
  of 
  a 
  single 
  individual. 
  A 
  portion 
  of 
  the 
  left 
  

   mandible, 
  supporting 
  three 
  teeth 
  remains 
  in 
  place, 
  and 
  almost 
  the 
  entire 
  boundary 
  of 
  the 
  right 
  orbit 
  is 
  preserved. 
  

  

  The 
  fragment 
  indicates 
  a 
  much 
  larger 
  species 
  than 
  any 
  other 
  referred 
  to 
  the 
  genus, 
  and 
  next 
  to 
  the 
  Lepto- 
  

   phractus 
  obsoletus, 
  the 
  largest 
  of 
  the 
  Batrachians 
  of 
  the 
  Ohio 
  Coal 
  Measures. 
  Without 
  more 
  complete 
  remains 
  it 
  is 
  

   not 
  easy 
  to 
  determine 
  its 
  generic 
  relations 
  finally. 
  It 
  differs 
  from 
  the 
  Leptoplir 
  actus 
  in 
  the 
  absence 
  of 
  the 
  symmetri- 
  

   cal 
  scutellation 
  of 
  the 
  cranium. 
  

  

  The 
  form 
  of 
  the 
  head 
  is 
  probably 
  elongate 
  and 
  the 
  muzzle 
  neither 
  very 
  obtuse 
  nor 
  elongate. 
  The 
  orbit 
  is 
  

   rather 
  small 
  and 
  near 
  the 
  middle 
  of 
  the 
  length 
  of 
  the 
  specimen, 
  which 
  is, 
  however, 
  incomplete 
  at 
  both 
  ends. 
  The 
  

   sculpture 
  of 
  the 
  surface 
  of 
  the 
  head 
  posterior 
  to 
  the 
  orbits, 
  as 
  well 
  as 
  round 
  their 
  borders 
  and 
  for 
  some 
  distance 
  in 
  

   front 
  of 
  them, 
  consists 
  of 
  a 
  rather 
  coarse 
  pitting. 
  On 
  the 
  middle 
  line 
  between 
  the 
  orbits 
  and 
  on 
  the 
  muzzle, 
  the 
  

   intervals 
  become 
  narrower, 
  and 
  are 
  confluent 
  into 
  transverse 
  ridges 
  or 
  a 
  delicate 
  reticulation. 
  The 
  surface 
  of 
  the 
  

   mandible 
  displays 
  a 
  coarse 
  reticulation. 
  

  

  The 
  teeth 
  are 
  stoutly 
  conic, 
  and 
  -with 
  delicately 
  striate 
  grooved 
  cementum. 
  They 
  are 
  slightly 
  recurved. 
  

   This 
  species 
  differs 
  from 
  the 
  T. 
  radiatus 
  and 
  T. 
  obtusus, 
  in 
  the 
  absence 
  of 
  the 
  segmental 
  areae 
  into 
  which 
  the 
  

   sculpture 
  is 
  thrown 
  in 
  them. 
  

  

  Measurements. 
  M. 
  

  

  Longitudinal 
  diameter 
  of 
  orbit, 
  0.019 
  

  

  Length 
  of 
  alveolar 
  border 
  supporting 
  three 
  teeth, 
  .013 
  

  

  Diameter 
  of 
  basis 
  of 
  tooth, 
  .003 
  

  

  Eight 
  pits 
  in, 
  .010 
  

  

  Dedicated 
  to 
  Professor 
  Thomas 
  H. 
  Huxley, 
  facile 
  princeps 
  among 
  English 
  systematists, 
  and 
  an 
  important 
  con- 
  

   tributor 
  to 
  the 
  knowledge 
  of 
  the 
  extinct 
  Batrachia. 
  

  

  LEPTOPHR 
  ACTUS, 
  Cope. 
  

   Proceed. 
  Acad. 
  Nat. 
  Sci., 
  1873, 
  340. 
  

  

  LEPTOTHRACTUS 
  OBSOLETUS, 
  Cope. 
  

   Loc. 
  cit., 
  1873, 
  p. 
  341. 
  

  

  