98 ARKIV FÖR ZOOLOGI. BAND 14. NIO 4. 



Nasua nasua söderströmii n. subsp. 



1 c? ad., near Baeza, road to Napo, -77 1920. 



Snout and oheeks including the orbital region are grizzled 

 brovvnish grey (whitish hairs with blackish tips). Crown and 

 sides of head behind orbital region buff, overlaid with dark 

 brown or blackish tips to the hairs. Chin whitish, throat 

 more brownish, a dirty brownish white band on the sides of 

 the neck bordered on the iipper side by a black band from 

 the ear backwards. Ears black behind, white on anterior 

 margin and inside. Orbital markings obsolete except that 

 the postorbital spöt can be traced as a greyish white spöt 

 in the buffy surroundings. Nape, npper neck, anterior back, 

 sides of body and shoulders nist red, deepest on the back, 

 somewhat paler on the flanks, and on före legs partlv mixed 

 with black. On the centre of the back a black mesial stripe 

 begins and extends backwards to the tip of the tail. The 

 hind quarters are very much darker than the före quarters 

 with the long hairs partly very dark rufous, partly blackish 

 and with the brown under-fur shining through. Före- as 

 well as hind-feet blackish. Lower side with scattered dirty 

 whitish long hairs and brown under-fur, belly paler. Lower 

 side of tail with well defined whitish rings between the black. 

 Seven such rings are present but as the tip of the tail is 

 broken the total number cannot be stated. Hind-foot, dry, 

 (s. u.) about 8 cm. The fur is rather short, generally about 

 20 mm. the longest hairs on the back about 27 mm. 



The rich rufous colour of this animal reminds about 

 the rufous Coati of northeastern Brazil which of ten is termed 

 »Nasua rufa Desm.», and the skull as well has a similar 

 shape as in the latter. For comparison I have used the 

 skulls of six adult raales from Miritiba, Maranhäo. The 

 cranial measurements of three (the smallest and largest) of 

 these are recorded below together with the corresponding 

 ones of the present type specimen from Baeza. An exami- 

 nation of these measurements reveals that these skulls are 

 all rather broad and stout with comparatively short pre- 

 orbital portion and also rather broad palate. But at the 

 same time the Coati from Baeza has a smaller skull in every 

 dimension than even the smallest one from Miritiba. The 

 raaxillary portion of the jaw is so much shortened in the 



