﻿G. 
  B. 
  Wieland 
  — 
  Huge 
  Cretaceous 
  Turtles. 
  247 
  

  

  The 
  ilia 
  are 
  short 
  and 
  robust, 
  and 
  curved 
  into 
  distinct 
  elbows, 
  

   the 
  dorsal 
  angles 
  of 
  which 
  are 
  very 
  prominent, 
  though 
  liga- 
  

   mental 
  attachment 
  was 
  confined 
  to 
  the 
  distinctly 
  rounded 
  dis- 
  

   tal 
  ends. 
  

  

  There 
  are 
  few 
  pelves 
  of 
  fossil 
  marine 
  turtles 
  known 
  with 
  

   sufficient 
  exactness 
  to 
  make 
  a 
  close 
  comparison 
  with 
  the 
  present 
  

   beautiful 
  specimen 
  wholly 
  satisfactory. 
  It 
  no 
  doubt 
  conforms 
  

   quite 
  nearly 
  to 
  the 
  pelvis 
  of 
  Protostega 
  which 
  has 
  been 
  figured 
  

  

  Figure 
  6. 
  Archelon 
  ischyros 
  Wieland 
  (type 
  specimen). 
  Ventral 
  view 
  of 
  

   pelvis 
  of 
  specimen 
  12 
  feet 
  in 
  length, 
  -£- 
  natural 
  size 
  ; 
  p, 
  pubis 
  ; 
  il, 
  ileum 
  ; 
  is, 
  ischium: 
  

   o, 
  obturator 
  foramen 
  : 
  io, 
  interobturator 
  cartilaginous 
  area. 
  

  

  by 
  Case, 
  though 
  the 
  specimens 
  he 
  examined 
  did 
  not 
  disclose 
  

   the 
  interesting 
  conformation 
  of 
  the 
  obturator 
  foramen. 
  

  

  The 
  presence 
  of 
  this 
  feature, 
  still 
  seen 
  in 
  certain 
  land 
  turtles, 
  

   in 
  distinctly 
  marine 
  turtles 
  of 
  the 
  Mesozoic, 
  is 
  certainly 
  inter- 
  

   esting, 
  and 
  may 
  be 
  regarded 
  as 
  a 
  persistent 
  character 
  inherited 
  

   from 
  a 
  land 
  ancestry. 
  

  

  