﻿r)02 
  rnncKEDiXGs 
  of 
  the 
  xatioxal 
  musevm. 
  

  

  being 
  darker 
  tliaii 
  Sciiirus 
  fossor 
  (typical), 
  is 
  mucli 
  paler, 
  as 
  well 
  as 
  

   somewhat 
  smaller. 
  Mr. 
  Bryant 
  described 
  ' 
  a 
  very 
  dark 
  form 
  of 
  8. 
  fos- 
  

   tior 
  — 
  the 
  subspecies 
  nif/ripes 
  — 
  inhabiting- 
  the 
  redwood 
  belt 
  of 
  the 
  coast 
  

   region 
  of 
  California, 
  south 
  of 
  San 
  Francisco, 
  from 
  specimens 
  taken 
  in 
  

   San 
  Mateo 
  County. 
  Through 
  the 
  courtesy 
  of 
  Mr. 
  F. 
  W. 
  True 
  and 
  

   Doctor 
  J. 
  A. 
  Allen 
  I 
  have 
  been 
  able 
  to 
  compare 
  topo-types 
  of 
  Sciurus 
  

   fosHor 
  nigripes 
  witli 
  the 
  present 
  form, 
  and 
  with 
  true 
  Sciurus 
  fossor 
  from 
  

   the 
  Sierra 
  Nevada 
  and 
  other 
  mountains 
  of 
  northern 
  California 
  and 
  

   Oregon 
  north 
  as 
  far 
  as 
  the 
  Columbia 
  Eiver, 
  with 
  the 
  result 
  that 
  three 
  

   distinct 
  geographic 
  phases 
  of 
  H. 
  fos.sor 
  are 
  recognized. 
  The 
  typical 
  

   form 
  is 
  large, 
  without 
  reddish-brown 
  on 
  the 
  back 
  or 
  blackish 
  feet, 
  and 
  

   the 
  caudal 
  hairs 
  are 
  so 
  thickly 
  ringed 
  with 
  black 
  that 
  there 
  is 
  no 
  dis- 
  

   tinctly 
  tricolored 
  pattern 
  to 
  the 
  under 
  surface 
  of 
  the 
  tail. 
  Its 
  colora- 
  

   tion 
  is 
  darker 
  than 
  that 
  of 
  the 
  i)resent 
  form 
  and 
  paler 
  than 
  in 
  S.fo.ssor 
  

   Higript's. 
  Xamed 
  in 
  honor 
  of 
  Mr. 
  A. 
  W. 
  Anthony, 
  of 
  San 
  Diego, 
  

   California. 
  

  

  CASTOR 
  CANADENSIS 
  FRONDATOR, 
  new 
  sixbspecies. 
  

   BROAD-TAILED 
  BEAVER. 
  

  

  Type. 
  — 
  ^o. 
  t^Mh 
  U.S.N.M, 
  (Collection 
  International 
  Boundary 
  Com- 
  

   mission.) 
  Adult 
  male, 
  from 
  the 
  San 
  Pedro 
  Eiver, 
  Sonora, 
  Mexico, 
  near 
  

   monument 
  No. 
  08 
  of 
  the 
  Mexican 
  boundary 
  line. 
  Collected 
  by 
  Doctor 
  

   Edgar 
  A. 
  Mearns 
  and 
  Mr. 
  F. 
  X. 
  Holzner, 
  October 
  24, 
  1892. 
  Original 
  

   number, 
  2151. 
  

  

  Description 
  of 
  Type. 
  — 
  Larger 
  than 
  the 
  beaver 
  of 
  Canada, 
  paler 
  and 
  

   different 
  in 
  coloration, 
  with 
  a 
  much 
  broader 
  tail. 
  Above 
  russet, 
  chang- 
  

   ing 
  to 
  chocolate 
  on 
  the 
  caudal 
  peduncle 
  above, 
  and 
  to 
  burnt 
  sienna 
  on 
  

   the 
  feet; 
  toes 
  reddish 
  chocolate. 
  Below 
  grayish 
  cinnamon, 
  brightening 
  

   to 
  ferruginous 
  on 
  the 
  under 
  side 
  of 
  the 
  caudal 
  peduncle. 
  Sides 
  wood- 
  

   brown, 
  enlivened 
  by 
  tlie 
  tawny-olive 
  color 
  of 
  the 
  overhair. 
  Length 
  

   1,070 
  mm.; 
  length 
  of 
  tail, 
  measured 
  from 
  anus, 
  oOO; 
  length 
  of 
  bare 
  por- 
  

   tion 
  of 
  tail, 
  290; 
  width 
  of 
  bare 
  portion 
  of 
  tail, 
  125; 
  height 
  of 
  ear 
  from 
  

   crown, 
  31; 
  height 
  of 
  ear 
  from 
  anterior 
  base, 
  35; 
  distance 
  from 
  tip 
  of 
  

   nose 
  to 
  eye, 
  68 
  ; 
  from 
  tip 
  of 
  nose 
  to 
  ear. 
  125 
  ; 
  nose 
  to 
  occiput, 
  1(!5 
  ; 
  length 
  

   of 
  mauus, 
  with 
  claw, 
  82; 
  lemgth 
  of 
  pes, 
  with 
  claw, 
  185. 
  Weight, 
  02 
  

   pounds 
  avoirdupois. 
  Skull, 
  133 
  by 
  09. 
  

  

  EemarJcs. 
  — 
  Tlie 
  beaver 
  of 
  Canada 
  and 
  the 
  northeastern 
  United 
  States 
  

   is 
  of 
  a 
  beautiful 
  glossy 
  bay 
  on 
  the 
  upper 
  surface, 
  paling 
  to 
  chestnut 
  on 
  

   the 
  head 
  and 
  rump. 
  The 
  under 
  surface 
  is 
  seal 
  brown. 
  Sometimes 
  the 
  

   color 
  is 
  still 
  darker, 
  the 
  back 
  being 
  blackish 
  brown, 
  the 
  caudal 
  jjeduncle 
  

   burnt 
  umber, 
  and 
  the 
  under 
  side 
  of 
  head 
  vandyke 
  brown. 
  The 
  feet 
  are 
  

   seal 
  brown. 
  1 
  have 
  examined 
  thirty 
  three 
  skulls 
  and 
  a 
  larger 
  number 
  

   of 
  skins 
  of 
  this 
  race 
  of 
  the 
  beaver 
  from 
  Arizona 
  and 
  Sonora. 
  In 
  old 
  

   males 
  the 
  total 
  length 
  reaches 
  1,1-30 
  mm.; 
  and 
  the 
  bare 
  and 
  scaly 
  por- 
  

  

  ' 
  Proc. 
  C;il. 
  Acad. 
  Sci., 
  2d 
  ser., 
  II, 
  1SS9, 
  p. 
  25. 
  

  

  