﻿AND 
  AVES 
  .OF 
  NORTH 
  AMERICA. 
  

  

  161 
  

  

  Fig. 
  44. 
  

  

  ft. 
  

  

  Lin. 
  

  

  1 
  

  

  7.5 
  

  

  

  8. 
  

  

  2 
  

  

  0.5 
  

  

  1 
  

  

  2.5 
  

  

  1 
  

  

  4. 
  

  

  but 
  is 
  a 
  narrow 
  pit 
  with 
  the 
  margins 
  much 
  raised, 
  and 
  with 
  a 
  delicate 
  carina 
  along 
  its 
  middle; 
  sides 
  little 
  rugose. 
  

   Length 
  of 
  fossa 
  1.5 
  inches; 
  it 
  is 
  parallel 
  to 
  the 
  costal 
  suture, 
  at 
  a 
  distance 
  of 
  one 
  inch. 
  

  

  The 
  specimen 
  from 
  Birmingham 
  accompanied 
  that 
  of 
  the 
  

   Lytoloma 
  angusta, 
  and 
  a 
  femur. 
  As 
  the 
  proximal 
  region 
  of 
  

   the 
  latter 
  has 
  no 
  resemblance 
  to 
  that 
  of 
  any 
  Cheloniid, 
  I 
  

   suspect 
  it 
  belongs 
  to 
  the 
  genus 
  Taphrosphys, 
  especially 
  as 
  

   its 
  size 
  relates 
  to 
  that 
  of 
  this 
  species. 
  Its 
  peculiarity 
  con- 
  

   sists 
  in 
  the 
  head 
  being 
  very 
  much 
  compressed, 
  and 
  the 
  great 
  tro- 
  

   chanter 
  smaller 
  and 
  in 
  the 
  same 
  plane. 
  The 
  lesser 
  trochanter 
  is 
  

   opposite 
  the 
  middle 
  of 
  the 
  side 
  of 
  the 
  head, 
  its 
  plane 
  being 
  parallel 
  

  

  with 
  that 
  of 
  the 
  head, 
  and 
  connected 
  with 
  the 
  latter 
  by 
  a 
  thick 
  

  

  cross-bridge 
  ; 
  it 
  is 
  independent 
  of 
  the 
  great 
  trochanter. 
  From 
  

  

  the 
  outside 
  the 
  articular 
  face 
  of 
  the 
  head 
  extends 
  through 
  an 
  arc 
  

  

  of 
  190°. 
  The 
  distal 
  extremity 
  of 
  the 
  femur 
  is 
  considerably 
  like 
  

  

  that 
  of 
  the 
  Propleura 
  sopita. 
  The 
  shank 
  is 
  narrow, 
  and 
  rap- 
  

   idly 
  expands 
  to 
  the 
  condyles, 
  and 
  on 
  the 
  inner 
  side 
  into 
  a 
  

  

  prominent 
  rugose 
  ridge. 
  Condyle 
  quite 
  promine*nt 
  below, 
  the 
  

  

  inner 
  most 
  so; 
  shank 
  next 
  to 
  them 
  striate. 
  Middle 
  of 
  shank 
  lost. 
  

  

  Length 
  of 
  axillary 
  pit, 
  

   Greatest 
  width, 
  

   Width 
  on 
  costal 
  bone, 
  

   Diameter 
  head 
  femur, 
  

   " 
  condyles 
  do., 
  

  

  Another 
  specimen 
  from 
  Barnesboro 
  exhibits 
  an 
  azygus 
  bone 
  in 
  contact 
  with 
  the 
  caudal 
  marginal. 
  It 
  resembles 
  

   the 
  cobssified 
  proximal 
  portions 
  of 
  the 
  last 
  pair 
  of 
  costal 
  bones, 
  and 
  bears 
  with 
  the 
  penultimate 
  the 
  pit 
  for 
  attachment 
  

   of 
  the 
  crest 
  of 
  the 
  ilium. 
  It 
  appears, 
  however, 
  to 
  be 
  bounded 
  by 
  continuous 
  suture 
  posteriorly, 
  and 
  hence 
  

   is 
  perhaps 
  a 
  vertebral 
  bone. 
  Its 
  surface, 
  like 
  that 
  of 
  the 
  plastron, 
  is 
  reticulately 
  grooved. 
  Pubic 
  suture 
  grooved 
  

   medially 
  directed 
  inwards 
  from 
  lateral 
  sternal 
  margin, 
  with 
  high 
  crest 
  on 
  outer 
  edge, 
  larger; 
  margin 
  of 
  plastron 
  

   dilated, 
  thin; 
  marginal 
  bones 
  thick, 
  with 
  heavy 
  margin. 
  

  

  The 
  free 
  margins 
  of 
  the 
  xiphisternal 
  thin 
  out 
  regularly 
  to 
  the 
  flat 
  inferior 
  surface. 
  The 
  edges 
  of 
  the 
  marginal 
  

   bones 
  are, 
  on 
  the 
  contrary, 
  much 
  thicker 
  than 
  the 
  former, 
  and 
  than 
  the 
  same 
  pieces 
  in 
  P. 
  sulcatus, 
  since 
  the 
  heavy 
  

   portion 
  is 
  much 
  nearer 
  the 
  margin, 
  Sutures 
  of 
  the 
  scutes 
  are 
  apparent 
  on 
  these 
  bones, 
  and 
  the 
  anterior 
  of 
  the 
  anal 
  

   scutum 
  on 
  the 
  xiphisternal. 
  The 
  ischiadic 
  scar 
  is 
  large 
  and 
  on 
  an 
  elevation; 
  it 
  is 
  elevated 
  on 
  the 
  outer 
  margin, 
  and 
  

   deeply 
  grooved 
  in 
  the 
  middle 
  line. 
  A 
  sub-round 
  elevation, 
  with 
  cross 
  ridges, 
  situated 
  near 
  the 
  margin 
  of 
  the 
  plastron, 
  

   is 
  the 
  attachment 
  of 
  the 
  pubis. 
  

  

  In. 
  Lin. 
  

  

  Length 
  of 
  ischiadic 
  suture, 
  2 
  1.5 
  

  

  Width 
  " 
  " 
  7.3 
  

  

  Distance 
  from 
  nearest 
  margin 
  behind, 
  1 
  6.5 
  

  

  The 
  posterior 
  vertebral 
  has 
  a 
  peculiar 
  form, 
  and 
  if 
  correctly 
  identified 
  would 
  indicate 
  a 
  short 
  caudal 
  and 
  short- 
  

   ened 
  ultimate 
  costal 
  bone. 
  It 
  is 
  thicker 
  than 
  any 
  of 
  the 
  costal 
  bones 
  of 
  other 
  species, 
  and 
  has 
  at 
  its 
  anterior 
  part 
  

   below, 
  a 
  short 
  longitudinal 
  ridge. 
  Its 
  sculpture 
  is 
  like 
  that 
  of 
  the 
  sternum, 
  composed 
  of 
  inosculating 
  grooves, 
  

   forming 
  a 
  coarse 
  figure. 
  Its 
  anterior 
  outline 
  is 
  transverse; 
  antero-lateral, 
  oblique; 
  latero-posterior, 
  straight 
  longitudi- 
  

   nal 
  not 
  continuous 
  with 
  the 
  former, 
  but 
  with 
  a 
  short 
  margin 
  at 
  an 
  obtuse 
  angle, 
  which 
  proceeds 
  from 
  the 
  antero- 
  

   lateral 
  at 
  a 
  projecting 
  right 
  angle. 
  Posterior 
  suture 
  concave, 
  to 
  meet 
  the 
  posterior 
  or 
  caudal 
  marginal. 
  Latero- 
  

   posterior 
  margin 
  bevelled 
  below. 
  Penultimate 
  costal 
  narrowing 
  proximally, 
  and 
  supporting 
  the 
  longitudinal 
  

   elevation 
  which 
  bounds 
  the 
  iliac 
  pit 
  anteriorly. 
  

  

  AMERI. 
  PHILO. 
  SOC 
  VOL. 
  XIV. 
  

  

  -41 
  

  

  