00 On Mammals from the Loiccr Amazon, 



the peculiar rose-colour referred to in Fraulein Siiethlage's 

 note below. Crown and face dull fulvous brown, the side of 

 tlie face in front of the ear also fulvous. Ears short, rounded, 

 practically naked, their few minute hairs fulvous. Rump 

 rich rufous, almost " orano^e-rufous.'" Fore limbs greyish 

 buffy above, pinkish buff on inner aspect ; hind limbs 

 rufous to ankles, buffy on inner aspect and feet. Tail rich 

 rufous, in continuation with rump, above, pinkish buffy 

 below ; line of demarcation not sharply marked. 



In specimens 11 and 12 the colour is darker throughout, 

 the rump and tail being rather rufous brown than rufous. 



Skull not of the peculiar slender muzzled shape of that of 

 P. scaloi^s, but more normal in outline, the muzzle evenly 

 conical. Nasals long, greatly expanded behind. Supra- 

 orbital edges square, though not sharply so, thickened, but 

 not forming postorbital processes. Palatal vacuities small, 

 opposite the first two molariform teeth. 



Teeth of normal size, larger tliroughout than in P. scaJop-t, 

 the three upper premolars evenly increasing in size backwards. 



Dimensions of the type (measured in flesh) : — 



Head and body 129 mm. ; tail 60 ; hind foot 21 ; ear 15. 



Skull: condylo-basal length 33'3 ; basal length 31*3; 

 zygomatic breadtii 18*4: ; nasals 16 x 5'7 ; interorbital breadth 

 7"3 ; intertemporal breadth 6'1 ; ))alatal length 18"2 ; front of 

 canine to back of last molar lo"3 ; breadth between outer 

 corners oi m^ 11'4; three anterior molariform teeth 6. 



Hah. as above. 



Tyjie. Adult male. B.M. no. 11. 12. 22. 16. Original 

 number 4. Collected 13th September, 1911, 



This very pretty little opossum, which is named in honour 

 of its discoverer, has the general colour-scheme of P. scalops, 

 although the rufous of head and rump is not so bright and 

 the belly-hairs are not plumbeous basally. The skull, how- 

 ever, is quite different in shape. 



With regard to the peculiar rose-colour now shown on the 

 belly of no. 4 and in part of no. 11, Fiiiulein Snethlage 

 writes : — "The first one that I got (no. 4) had the underparts 

 oi' a rather vivid rusty red, which changed during the night 

 to the rose-colour that it now shows. No. 11 was shot by 

 my preparator among dry palm-leaves on the ground, and he 

 assures me that its belly was already rose-colour when he 

 picked it up ; it certainly was when 1 saw it half an hour 

 later." No. 12 has no trace of this rose-colour, which would 

 seem to be akin to the fugitive purplisli colour visible on 

 ircshly killed examples of LntreoVma crassicaudata, as I have 

 myself seen in La IMata. 



