264 New Mammals from New Guinea kc. 
Hab. Doormanpad-bivak, N.W. New Guinea (W. C. van 
fTeurn). 
Type. Male. B.M. no. 22. 2.2.44. Original number 90. 
Hydromys esox illuteus, subsp. n. 
Like esoa, but greyer and less suffused with fulvous. 
Head and body 260 mm.; tail 215; hind foot 50:5. 
Skull-length 48°5. 
Hab. Idenburg River (W. C. van Heurn). 
Type. Male. B.M. no. 22. 2. 2. 61. Original number 45. 
Dorcopsis hagent caurina, subsp. n. 
Like hageni, but the colour browner and the sides as dark 
as the back. 
Head and body 640 mm. ; tail 440; hind foot 143. Skull- 
length 144. 
Hab. Mamberano River (W. C. van Heurn). 
Type. B.M. no. 22. 2. 2. 63. Original-number 218. 
Dorcopsis vanheurnt, sp. n. 
Allied to D. macleay?, but smaller and with finer, softer fur. 
Head and body 390 mm. ; tail 300; hind foot 100; ear 35. 
Skull-length 82. 
Hab. Doormanpad-bivak (W. C. van Heurn). 
Type. Adult female. B.M. no. 22. 2.2.64. Original 
number 16. 
Pseudochirus dammermani, sp. 0. 
Smallest species of the genus; allied to P. schlegehi, but 
smaller, and with end of tail naked below; ears pale, not 
blackish. 
Head and body (young) 152 mm.; tail 173. First two 
molariform teeth 6. 
Hab. Dutch North New Guinea. 
Type. Young. B.M.no. 22.2.2.69. Original number 89. 
Peroryctes dorsalis, sp. 0. 
Like P. ornatus, but the striping on head and rump praceti- 
cally confined to the median line; tail almost completely 
naked. 
Head and body 270 mm.; tail 185; hind foot 54. Skull- 
length 63. 
