﻿new 
  S.- 
  American 
  Mammals. 
  575 
  

  

  Dr. 
  Allen, 
  in 
  his 
  recent 
  paper, 
  considers 
  his 
  M. 
  peruanus 
  

   as 
  only 
  doubtfully 
  distinguishable 
  from 
  Gray's 
  ^^ 
  Macro 
  xus 
  

   l-uhlii," 
  said 
  to 
  have 
  been 
  collected 
  by 
  Castelnau, 
  and 
  there- 
  

   fore 
  thought 
  by 
  Dr. 
  Allen 
  to 
  have 
  come 
  from 
  somewhere 
  on 
  

   the 
  Upper 
  Amazons. 
  But 
  Dr. 
  Allen 
  has 
  quite 
  misunderstood 
  

   the 
  characters 
  of 
  kuhli*, 
  which 
  is 
  beyond 
  question 
  the 
  

   " 
  Sciurus 
  pusilhis'''' 
  oi 
  Q^m-wx-A, 
  w\\itTiCQ 
  the 
  type 
  must 
  have 
  

   come 
  — 
  probably 
  accidentally 
  mixed 
  with 
  Castelnau 
  material 
  

   b}' 
  the 
  dealer 
  (Paizudaki) 
  from 
  whom 
  it 
  was 
  bought. 
  Tlie 
  

   fact 
  that 
  the 
  hind 
  foot 
  of 
  the 
  type 
  of 
  kuhli 
  is 
  only 
  2G 
  mm. 
  in 
  

   length 
  would 
  alone 
  distinguish 
  it 
  from 
  any 
  of 
  the 
  Andean 
  

   Microsciurl. 
  

  

  Most 
  opportunely 
  three 
  specimens 
  of 
  the 
  Guianan 
  pigmy 
  

   squirrel 
  have 
  just 
  been 
  received 
  from 
  the 
  late 
  Mr. 
  McConnelPs 
  

   collector 
  Cozier, 
  one 
  of 
  them 
  having 
  a 
  perfect 
  skull, 
  and 
  I 
  

   am 
  now 
  able 
  to 
  state 
  that 
  this 
  animal 
  is 
  not 
  a 
  Microsciurus 
  at 
  

   all, 
  but 
  represents 
  a 
  new 
  genus 
  allied 
  to 
  the 
  Malayan 
  and 
  

   W. 
  -African 
  pigmy 
  squirrels. 
  Its 
  description 
  is 
  given 
  else- 
  

   where, 
  but 
  a 
  new 
  subspecies 
  of 
  it 
  may 
  be 
  here 
  described 
  : 
  — 
  

  

  Sciurillus 
  pusiUus 
  glaucinuSj 
  subsp. 
  n. 
  

  

  Like 
  S. 
  pusillus, 
  but 
  much 
  paler 
  througliout. 
  

  

  General 
  colour 
  above 
  " 
  neutral 
  grey 
  " 
  instead 
  of 
  greyish 
  

   hair-brown. 
  Under 
  surface 
  pale 
  grey 
  washed 
  with 
  light 
  

   buffy, 
  instead 
  of 
  dark 
  grey 
  washed 
  with 
  fulvous. 
  Crown, 
  

   muzzle, 
  and 
  inner 
  side 
  of 
  ears 
  pale 
  grizzled 
  buffy, 
  many 
  

   shades 
  lighter 
  than 
  the 
  almost 
  ferruginous 
  colour 
  of 
  pusillufi. 
  

   Back 
  of 
  ears 
  and 
  patches 
  behind 
  them 
  prominently 
  snowy 
  

   white. 
  Feet 
  grizzled 
  buffy. 
  Tail-hairs 
  tipped 
  with 
  whitisii, 
  

   a 
  number 
  of 
  hairs 
  in 
  the 
  terminal 
  pencil 
  black, 
  a 
  line 
  alono^ 
  

   the 
  centre 
  below 
  also 
  black. 
  

  

  Skull 
  apparently 
  rather 
  smaller 
  than 
  in 
  pusillus, 
  but 
  the 
  

   type 
  is 
  not 
  as 
  old 
  as 
  the 
  avidlable 
  examples 
  of 
  that 
  animal. 
  

  

  Dimensions 
  of 
  the 
  type 
  (measured 
  on 
  the 
  skin) 
  : 
  — 
  

  

  Head 
  and 
  body 
  104 
  mm.; 
  tail 
  113; 
  hind 
  foot 
  27-7. 
  

  

  Skull: 
  greatest 
  length 
  27'5; 
  condylo-incisive 
  length 
  25 
  ; 
  

   zygomatic 
  breadth 
  20 
  ; 
  nasals 
  (on 
  outer 
  edge) 
  7x4*7 
  ; 
  inter- 
  

   oibital 
  breadth 
  12'5 
  ; 
  breadth 
  of 
  brain-case 
  15 
  ; 
  palatilar 
  

   length 
  10; 
  upper 
  tooth-series 
  (exclusive 
  of 
  /y^) 
  3*8. 
  

  

  Hab. 
  Great 
  Falls 
  of 
  Demerara 
  River, 
  British 
  Guiana. 
  

  

  Tppe. 
  Adult 
  mal-. 
  B.M. 
  no. 
  14.4.21.1. 
  Collected 
  

   by 
  Cozier 
  in 
  August 
  1913, 
  and 
  presented 
  by 
  Mis. 
  F. 
  V. 
  

   McConnell. 
  

  

  * 
  If 
  this 
  has 
  been 
  at 
  all 
  due 
  to 
  any 
  statement 
  or 
  omission 
  in 
  my 
  letters 
  

   to 
  him 
  on 
  the 
  subject, 
  I 
  must 
  ask 
  his 
  pardon. 
  

  

  