anew Genus of Yichimyinse. 115 



spinous, the spines on the hinder back about 30 mm. in 

 length and attaining 2*3 mm. in breadth ; true hair hardly 

 perceptible anywliere, there being only a few short hairs 

 liidden among tlie bases of the spines, while the covering of 

 the lower surface is also almost wholly spinous. Whisker- 

 bristles very long. General colour above dark brown, 

 punctuated on the shoulders, sides, and rump by buffy. 

 Individually the spines on the dorsal s.iddle are greyish 

 brown darkening to blackish brown terminally, the lateral 

 and posterior ones with broad buflfy ti[)S. On the nape and 

 sides the underlying hairs, which are bright ochraceous huffy, 

 show through the spines and affect the general colour. Under 

 surface dull buffy whitish, a little darker on the clie.st. Innei- 

 sides of arms and legs buffy whitish. Hands and feet dull 

 whitish. Feet comparatively short and broad, as in Mesoviijs 

 and Echimys. Tail long, its proximal two-thirds almost 

 naked, merely with a few minute scattered bristles on it; 

 these lengthen terminally, and at the end there is a conspicuous 

 vertically distichous brush of long coarse dark brown hairs, 

 of which the longest — those of the upper side — attain over 

 70 mm. in length. 



Skull and teeth as above described. 



Dimensions of the type; — 



Head and body 177 mm.; tail 189; hind foot 30; 

 ear 13. 



Skull: greatest length 43; condylo-incisive length 39; 

 zygomatic breadth 25; nasals 12; interorbital breadth 11; 

 mastoid breadth 20*3; palatilar length 14*2 ; palatal foi'a- 

 niina 5 ; upper cheek-tooth series 8. 



Ha}), (of type). Villa Braga, o;i the left bank of the Rio 

 I'apajnz, just above the tirst rapids. 



Type. Adult male. B.M. no. 20. 6. 4. 1. Origiiia' num- 

 ber 142. Collected 8th February, 1917, by Friiulein Dr. E. 

 Snethl igc. Presented by the Goeldi Museum. 



This striking and pexuliur animal, which was captured by 

 Fiaidein Snethlage herself, forms a discovery of the utmost 

 interest, and I iuive very great pleasuie in connecting her 

 name with it, adding, as it does, another to the many remarkable 

 Amazonian mammals which she has been instrumental in 

 brinii-inii to the notice of zoologists. 



8* 



