﻿Manus 
  Island, 
  Admi'ralfi/ 
  Group, 
  c^'c. 
  435 
  

  

  3. 
  Dohsonta 
  anderseni, 
  sp. 
  n. 
  

  

  Three 
  from 
  Manus 
  and 
  three 
  from 
  R,uk. 
  

  

  A 
  member 
  of 
  tiie 
  D. 
  moluccensis 
  oroup. 
  Size 
  intermediate 
  

   between 
  that 
  of 
  the 
  two 
  large 
  and 
  the 
  two 
  smaller 
  members 
  

   of 
  the 
  group. 
  Colour 
  of 
  head 
  and 
  mantle 
  unusually 
  dark. 
  

  

  The 
  following 
  account 
  is 
  arranged 
  as 
  in 
  Dr. 
  Andersen's 
  

   Catalogue 
  : 
  — 
  

  

  Diagnosis. 
  Allied 
  to 
  D. 
  moluccensis, 
  but 
  smaller. 
  Fore- 
  

   arm 
  in 
  adults 
  123-125 
  mm. 
  Uab. 
  Admiralty 
  and 
  link 
  

   Islands. 
  

  

  Dentition 
  as 
  in 
  D. 
  moluccensis^ 
  the 
  ridges 
  and 
  cusps 
  quite 
  

   as 
  in 
  that 
  species. 
  . 
  

  

  Colour. 
  Very 
  dark. 
  Head 
  blackish 
  brown, 
  almost 
  black; 
  

   mantle 
  dark 
  brown, 
  allied 
  to 
  but 
  much 
  darker 
  than 
  Ridgway's 
  

   " 
  niumnty-brown 
  " 
  ; 
  conspicuously 
  darker 
  than 
  in 
  any 
  of 
  the 
  

   four 
  known 
  species 
  of 
  the 
  moluccensis 
  group. 
  Under 
  surface 
  

   sepia, 
  the 
  centre 
  of 
  the 
  abdomeu 
  with 
  an 
  inconspicuous 
  wash 
  

   of 
  dull 
  ochruceous. 
  

  

  Dentition 
  as 
  in 
  D. 
  moluccensis, 
  the 
  ridges 
  and 
  cusps 
  of 
  the 
  

   teeth 
  quite 
  as 
  in 
  that 
  species. 
  

  

  Measurements 
  : 
  — 
  

  

  Forearm 
  of 
  type 
  124 
  mm., 
  other 
  specimens 
  123, 
  125 
  ram. 
  

  

  Third 
  finger, 
  metacarpal 
  79, 
  tirst 
  phalanx 
  56 
  ; 
  lower 
  leg 
  

   and 
  foot' 
  (c. 
  u.) 
  89. 
  

  

  Skull 
  : 
  greatest 
  length 
  54"5 
  ; 
  palation 
  to 
  incisive 
  foramina 
  

   25*2 
  ; 
  zygomatic 
  breadth 
  33*6; 
  interorbital 
  breadth 
  9 
  ; 
  inter- 
  

   temporal 
  breadth 
  8; 
  front 
  of 
  canine 
  to 
  back 
  of 
  ??i^ 
  20; 
  

   m' 
  5-7x3 
  ; 
  7/?i4-5x2'2. 
  

  

  JRmige. 
  Admiralty 
  Islands 
  and 
  Ruk 
  Island, 
  southern 
  

   Bismarck 
  Archipelago. 
  This 
  would 
  seem 
  to 
  involve 
  occur- 
  

   rence 
  in 
  the 
  other 
  islands 
  of 
  the 
  Bismarck 
  Archipelago 
  ; 
  but 
  

   as 
  these 
  are 
  occupied 
  by 
  D. 
  j^rcedatrix, 
  a 
  species 
  of 
  about 
  the 
  

   same 
  size, 
  but 
  of 
  quite 
  another 
  group, 
  it 
  is 
  ])Ossible 
  that 
  the 
  

   range 
  of 
  D. 
  anderseni 
  is 
  really 
  interrupted, 
  and 
  only 
  covers 
  

   the 
  two 
  islands 
  first 
  mentioned. 
  

  

  Type. 
  Adult 
  male. 
  B.M. 
  no. 
  14. 
  4. 
  1. 
  4. 
  (Collected 
  7th 
  

   October, 
  1913. 
  

  

  This 
  species 
  is 
  in 
  size 
  intermediate 
  between 
  D. 
  exoleta 
  and 
  

   moluccensis, 
  and 
  fills 
  up 
  the 
  gap 
  between 
  " 
  a. 
  Much 
  smaller 
  " 
  

   and"/^ 
  Much 
  larger" 
  in 
  Dr. 
  Andersen's 
  synopsis 
  of 
  the 
  

   species 
  (Cat. 
  p. 
  459). 
  It 
  is 
  also 
  readily 
  distinguishable 
  from 
  

   any 
  of 
  the 
  other 
  species 
  of 
  the 
  section 
  by 
  its 
  very 
  much 
  

   darker 
  colour. 
  

  

  I 
  have 
  named 
  the 
  species 
  in 
  honour 
  of 
  Dr. 
  K. 
  Andersen, 
  in 
  

   recognition 
  of 
  the 
  striking 
  monograph 
  of 
  Dohsonia 
  contained 
  

  

  30* 
  

  

  