﻿CANYON 
  FERRY 
  FOSSIL 
  VERTEBRATES 
  — 
  ^WHITE 
  415 
  

  

  Eumys 
  cf. 
  exiguus 
  Wood 
  

  

  USNM 
  18866 
  and 
  18867, 
  2 
  mandibular 
  fragments 
  with 
  Mj-s; 
  

   USNM 
  18865, 
  1 
  maxillary 
  fragment 
  with 
  Mi-j. 
  All 
  specimens 
  are 
  

   from 
  locality 
  No. 
  24LC17. 
  

  

  This 
  material 
  is 
  provisionally 
  referred 
  to 
  this 
  species 
  on 
  the 
  basis 
  

   of 
  the 
  tooth 
  cusp 
  arrangement. 
  "While 
  these 
  specimens 
  are 
  larger 
  

   than 
  the 
  type, 
  the 
  sample 
  is 
  too 
  small 
  to 
  furnish 
  grounds 
  for 
  separate 
  

   designation. 
  Measurements 
  of 
  teeth 
  (in 
  millimeters) 
  : 
  

  

  Af 
  J 
  All 
  Mi 
  

  

  Mi-3 
  — 
  

  

  USNM 
  No. 
  Length 
  Width 
  Length 
  Width 
  Length 
  Width 
  

  

  18867 
  7.1 
  2.7 
  1.6 
  2.2 
  1.7 
  2.3 
  1.7 
  

  

  18866 
  _ 
  6.4 
  2.3 
  1.4 
  2.1 
  1.5 
  1.8 
  1.5 
  

  

  18865 
  .- 
  2.7 
  1.9 
  2.0 
  1.6 
  

  

  Order 
  LAGOMORPHA 
  

   Family 
  Leporidae 
  

  

  Paleolagus 
  temnodon 
  Douglass 
  

  

  USNM 
  18869, 
  right 
  maxiUa 
  with 
  P^-M'; 
  USNM 
  18875, 
  right 
  

   maxilla 
  with 
  P^-M^; 
  USNM 
  18876, 
  right 
  maxilla 
  with 
  P^-P*; 
  USNM 
  

   18877, 
  right 
  mandible 
  with 
  P3-M3. 
  Specimens 
  are 
  from 
  locality 
  Nos. 
  

   24LC16 
  and 
  24BW18. 
  

  

  This 
  material 
  does 
  not 
  permit 
  any 
  additions 
  to 
  Wood's 
  (1940, 
  p. 
  

   320) 
  discussion 
  of 
  the 
  species. 
  

  

  Paleolagus 
  intermedius 
  Matthew 
  

  

  USNM 
  18872, 
  left 
  mandible 
  with 
  P3-M3; 
  USNM 
  18873, 
  left 
  man- 
  

   dible 
  with 
  P4-M2; 
  USNM 
  18874, 
  right 
  maxilla 
  with 
  P'-M^ 
  Speci- 
  

   mens 
  are 
  from 
  locahty 
  Nos. 
  24LC15 
  and 
  24LC17. 
  

  

  This 
  species 
  appears 
  to 
  be 
  relatively 
  rare 
  in 
  these 
  deposits 
  and 
  the 
  

   limited 
  material 
  does 
  not 
  permit 
  a 
  satisfactory 
  comparision 
  with 
  the 
  

   specimens 
  from 
  the 
  plains. 
  

  

  Paleolagus 
  burkei 
  Wood 
  

  

  USNM 
  18879-18894, 
  4 
  upper 
  and 
  12 
  lower 
  dentitions. 
  All 
  of 
  the 
  

   specimens 
  are 
  from 
  locality 
  Nos. 
  24LC15 
  and 
  24LC17. 
  

  

  The 
  upper 
  dentitions 
  are 
  slightly 
  larger 
  than 
  the 
  measurements 
  

   given 
  for 
  the 
  type 
  (Wood, 
  1940, 
  p. 
  327), 
  but 
  they 
  agree 
  quite 
  closely 
  

   in 
  the 
  details 
  of 
  the 
  tooth 
  form 
  and 
  do 
  not 
  agree 
  with 
  P. 
  haydeni 
  

   Leidy. 
  I 
  have 
  not 
  seen 
  any 
  material 
  from 
  the 
  Middle 
  Ohgocene 
  of 
  

   this 
  area 
  referable 
  to 
  the 
  latter 
  species. 
  It 
  is 
  possible 
  that 
  this 
  

   species 
  could 
  have 
  been 
  restricted 
  to 
  the 
  mountains 
  and 
  P. 
  haydeni 
  

   Leidy 
  restricted 
  to 
  the 
  plains 
  during 
  the 
  Middle 
  Oligocene 
  and 
  that 
  

   P. 
  burkei 
  Wood 
  did 
  not 
  spread 
  to 
  the 
  plains 
  until 
  the 
  Upper 
  Ohgocene. 
  

  

  