﻿12 
  SUPPLEMENT 
  TO 
  THE 
  EXTINCT 
  BATRACHIA 
  

  

  than 
  in 
  any 
  other 
  species. 
  The 
  under 
  jaw 
  of 
  the 
  right 
  side 
  is 
  partially 
  preserved, 
  and 
  displays 
  longitudinal 
  grooves. 
  

   The 
  ramus 
  is 
  stout 
  and 
  straight, 
  and 
  approaches 
  the 
  form 
  seen 
  in 
  Brachydectes 
  newberryi. 
  Its 
  teeth 
  are 
  not 
  pre- 
  

   served, 
  but 
  the 
  extremities 
  of 
  the 
  opposing 
  maxillaries 
  remain. 
  They 
  are 
  small 
  and 
  acutely 
  conic 
  ; 
  both 
  they 
  and 
  

   the 
  ramus 
  are 
  much 
  less 
  robust 
  than 
  in 
  the 
  above 
  mentioned 
  species, 
  and 
  the 
  enamel 
  preserved 
  is 
  smooth. 
  

  

  The 
  three 
  pectoral 
  shields 
  are 
  preserved, 
  and 
  as 
  the 
  exposed 
  surface 
  is 
  the 
  interior 
  it 
  is 
  smooth. 
  The 
  laterals 
  

   resemble 
  imperfectly, 
  spherical 
  triangles. 
  The 
  outer 
  margin 
  is 
  thin 
  and 
  convex, 
  and 
  the 
  anterior 
  angle 
  curves 
  round 
  

   the 
  apex 
  of 
  the 
  median 
  shield 
  and 
  joins 
  that 
  of 
  the 
  opposite 
  side 
  forming 
  a 
  coarse 
  interlocking 
  suture. 
  The 
  median 
  

   scute 
  is 
  formed 
  like 
  some 
  of 
  the 
  patterns 
  of 
  ancient 
  mirrors. 
  It 
  is 
  a 
  wide 
  oval 
  excavated 
  on 
  each 
  side 
  behind, 
  and 
  

   produced 
  from 
  between 
  these 
  concavities 
  inbo 
  a 
  long 
  flat 
  sternum-like 
  process. 
  The 
  latter 
  thus 
  resembles 
  the 
  

   xiphisternal 
  production 
  of 
  frogs 
  and 
  of 
  some 
  lizards 
  ; 
  as 
  in 
  the 
  former, 
  the 
  ribs 
  having 
  no 
  haemal 
  elements, 
  have 
  no 
  

   connection 
  with 
  it. 
  Its 
  extremity 
  is 
  simple 
  and 
  obtuse. 
  

  

  The 
  humerus 
  originates 
  at 
  the 
  outer 
  posterior 
  angle 
  of 
  the 
  lateral 
  thoracic 
  scutum. 
  It 
  is 
  relatively 
  as 
  large 
  as 
  

   that 
  of 
  a 
  frog, 
  is 
  contracted 
  medially, 
  and 
  much 
  expanded 
  distally. 
  It 
  is 
  followed 
  at 
  a 
  short 
  interval 
  by 
  a 
  shorter 
  

   ulna, 
  which 
  is 
  also 
  expanded 
  at 
  the 
  ends 
  and 
  contracted 
  at 
  the 
  middle. 
  Then 
  succeed 
  numerous 
  well 
  developed 
  

   phalanges, 
  which 
  are 
  so 
  scattered 
  as 
  to 
  render 
  it 
  impossible 
  to 
  ascertain 
  the 
  number 
  that 
  compose 
  the 
  digits 
  and 
  

   how 
  many 
  of 
  the 
  latter 
  existed. 
  

  

  The 
  vertebra 
  are 
  osseous 
  and 
  with 
  slightly 
  concave 
  extremities 
  on 
  a 
  lateral 
  view 
  ; 
  they 
  are 
  subquadrate 
  in 
  

   outline 
  ; 
  their 
  spines 
  are 
  not 
  distinguishable. 
  There 
  are 
  22-3 
  pairs 
  of 
  osseous 
  ribs, 
  which 
  are 
  slender, 
  rather 
  short, 
  

   and 
  strongly 
  curved 
  backwards. 
  

  

  Measurements. 
  M. 
  

  

  Length 
  of 
  specimen 
  as 
  preserved, 
  0.097 
  

  

  " 
  head, 
  .024 
  

  

  Width 
  of 
  head 
  posteriorly, 
  .020 
  

  

  Depth 
  of 
  ramus 
  mandibuli, 
  .004 
  

  

  Eight 
  apices 
  of 
  teeth 
  cover, 
  .005 
  

  

  Length 
  of 
  23 
  vertebrae. 
  .062 
  

  

  " 
  median 
  pectoral 
  scute, 
  .010 
  

  

  Width 
  " 
  " 
  " 
  .005 
  

  

  " 
  of 
  the 
  three 
  scuta, 
  .010 
  

  

  Length 
  process 
  of 
  median 
  scute, 
  .005 
  

  

  " 
  humerus, 
  .009 
  

  

  Width 
  " 
  .004 
  

  

  Length 
  ulna, 
  .006 
  

  

  Width 
  " 
  .002 
  

  

  Length 
  phalange, 
  .003 
  

  

  Expanse 
  of 
  longest 
  ribs, 
  .015 
  

  

  Length 
  of 
  a 
  long 
  rib, 
  .009 
  

  

  Besides 
  the 
  generic 
  characters 
  already 
  pointed 
  out, 
  this 
  species 
  differs 
  from 
  the 
  Sauropleura 
  longipes, 
  to 
  which 
  

   it 
  has 
  some 
  resemblance, 
  in 
  the 
  much 
  shorter 
  fore 
  limbs, 
  and 
  shorter 
  vertebral 
  column 
  in 
  the 
  anterior 
  region 
  of 
  the 
  

   body. 
  

  

  TUDITAJSTUS 
  BREVIROSTRIS,' 
  Cope, 
  Sp. 
  Nov. 
  

  

  Represented 
  by 
  two 
  individuals 
  and 
  probably 
  by 
  part 
  of 
  a 
  third. 
  Those 
  with 
  the 
  cranium 
  show 
  that 
  this 
  part 
  

   is 
  large 
  in 
  comparison 
  with 
  the 
  size 
  of 
  the 
  body, 
  and 
  is 
  as 
  wide 
  as 
  long, 
  with 
  broadly 
  rounded 
  muzzle. 
  The 
  orbits 
  

   are 
  large, 
  and 
  situated 
  for 
  the 
  greater 
  part 
  in 
  front 
  of 
  a 
  line 
  marking 
  the 
  anterior 
  third 
  of 
  the 
  length 
  of 
  the 
  head. 
  

   The 
  bones 
  of 
  the 
  head 
  are 
  coarsely 
  sculptured 
  with 
  radiating 
  ridges, 
  and 
  with 
  some 
  tubercles 
  posteriorily 
  ; 
  the 
  

   supratemporal 
  exhibits 
  radii 
  which 
  extend 
  outwards. 
  The 
  teeth 
  are 
  in 
  two 
  rows 
  on 
  that 
  part 
  of 
  the 
  maxillary 
  arch 
  

   anterior 
  to 
  the 
  orbits 
  ; 
  they 
  are 
  of 
  equal 
  sizes 
  ; 
  the 
  outer 
  row 
  appears 
  to 
  be 
  directed 
  more 
  obliquely 
  outwards 
  than 
  

   the 
  inner. 
  The 
  former 
  number 
  five 
  in 
  .002 
  M. 
  The 
  thoracic 
  shields 
  arc 
  rather 
  large, 
  and 
  have 
  coarse 
  radiating 
  

   ridges. 
  

  

  