﻿AND 
  AVES 
  OF 
  NORTH 
  AMERICA. 
  157 
  

  

  BOTH 
  REM 
  YS, 
  Leidy. 
  

  

  Cretaceous 
  Reptiles, 
  p. 
  110—113, 
  which 
  differs 
  from 
  Podocnemis 
  as 
  Chelys 
  does 
  from 
  

   other 
  Hydraspidae, 
  i. 
  e., 
  in 
  having 
  an 
  osseous 
  vomer. 
  This 
  is, 
  however, 
  only 
  a 
  generic 
  

   character. 
  Its 
  characters 
  are 
  more 
  fully 
  pointed 
  out 
  under 
  Euclastes, 
  while 
  we 
  refer 
  to 
  

   Leidy's 
  excellent 
  description 
  and 
  figure 
  for 
  other 
  details. 
  

  

  BOTHREMYS 
  COOKII, 
  Leidy. 
  

  

  Is 
  only 
  known 
  from 
  a 
  cranium 
  from 
  the 
  Cretaceous 
  Green 
  Sand 
  of 
  Gloucester 
  Co., 
  N. 
  J. 
  It 
  is 
  in 
  unusually 
  

   good 
  preservation, 
  but 
  has 
  not 
  yet 
  been 
  associated 
  with 
  its 
  carapace 
  and 
  other 
  elements. 
  It 
  will 
  probably 
  be 
  found 
  

   to 
  belong 
  to 
  either 
  the 
  following 
  genus, 
  or 
  Prochonias, 
  in 
  which 
  case 
  the 
  latter 
  becomes 
  a 
  synonyme. 
  

  

  Probably 
  to 
  the 
  Podocnemididae 
  also 
  is 
  to 
  be 
  referred 
  the 
  new 
  genus, 
  

  

  TAPHROSPHYS, 
  Cope. 
  

  

  American 
  Naturalist, 
  1869, 
  90. 
  

  

  Which 
  presents 
  the 
  characters 
  of 
  Podocnemis 
  in 
  several 
  respects. 
  It 
  has 
  like 
  it 
  an 
  

   inter-marginal 
  sternal 
  bone 
  on 
  each 
  side, 
  which 
  does 
  not 
  extend 
  to 
  the 
  median 
  line, 
  as 
  in 
  

   Sternothaerus. 
  The 
  other 
  characters 
  are 
  as 
  follows 
  : 
  

  

  Ischium, 
  with 
  a 
  small 
  attachment 
  on 
  the 
  posterior 
  margin 
  of 
  the 
  xiphisternal 
  bone 
  ; 
  

   pubis, 
  with 
  a 
  linear 
  attachment 
  on 
  the 
  same, 
  each 
  well 
  separated 
  from 
  the 
  other. 
  Ilium 
  

   received 
  into 
  a 
  deep, 
  elongate 
  pit 
  on 
  the 
  last 
  two 
  costal 
  elements 
  of 
  the 
  carapace. 
  Antero- 
  

   external 
  angle 
  of 
  the 
  hyosternal 
  bone 
  received 
  into 
  a 
  strong 
  pit 
  near 
  the 
  margin 
  of 
  the 
  

   first 
  costal. 
  Postero-superior 
  or 
  inguinal 
  prolongation 
  of 
  the 
  hyposternal 
  received 
  into 
  a 
  

   deep 
  linear 
  groove 
  of 
  the 
  corresponding 
  costal 
  bone. 
  Intergiilar 
  dermal 
  plate, 
  intermar- 
  

   ginal 
  ; 
  nuchal 
  plate, 
  none. 
  

  

  The 
  marginal 
  bones 
  at 
  the 
  sterno-costal 
  bridge 
  have 
  somewhat 
  expanded 
  margins, 
  

   though 
  their 
  inferior 
  aspect 
  is 
  not 
  in 
  the 
  plane 
  of 
  the 
  sternum. 
  This 
  point, 
  and 
  the 
  ab- 
  

   sence 
  of 
  the 
  nuchal 
  scute, 
  are 
  points 
  of 
  resemblance 
  to 
  Podocnemis. 
  The 
  latter 
  genus 
  

   differs 
  in 
  having 
  a 
  marginal 
  intergiilar 
  and 
  round 
  pubic 
  suture 
  scar. 
  The 
  anterior 
  or 
  nu- 
  

   chal 
  marginal 
  bone 
  is 
  much 
  larger 
  than 
  the 
  first 
  or 
  second 
  lateral, 
  and 
  is 
  opbyriform. 
  

   being 
  much 
  wider 
  behind 
  than 
  at 
  the 
  margin. 
  The 
  vertebral 
  bones 
  are 
  continued 
  to 
  be- 
  

   tween 
  the 
  costal 
  bones 
  which 
  support 
  the 
  ilia 
  in 
  one 
  example 
  of 
  T. 
  molops 
  only. 
  There 
  

   are 
  strong 
  vertical 
  inguinal 
  and 
  axillary 
  supports 
  of 
  the 
  carapace, 
  which 
  are 
  transverse 
  

   continuations 
  of 
  the 
  hyo- 
  and 
  hyposternal 
  bones 
  in 
  those 
  positions, 
  and 
  their 
  articulations 
  

   with 
  the 
  carapace 
  are 
  by 
  a 
  strong 
  gomphosis. 
  

  

  In 
  this 
  genus, 
  as 
  well 
  as 
  in 
  Podocnemis, 
  the 
  attachment 
  of 
  the 
  marginal 
  bones 
  to 
  the 
  

  

  AMERICA. 
  PHII.O. 
  SOC. 
  — 
  VOf,. 
  XIV. 
  40. 
  

  

  