100 ARKIV FÖR ZOOLOGI. BAND 1-1:. NIO 4. 



Chaco 

 E. Ecuador, Brazil, S. Brazil, Austral, 



Baeza Miritiba S:a Catharina Rio de 



^^ . Oro 



Transverse diameter o fm^ 7,5 8,2 8 84 7 7 



'"^^ 7,5 7,7 — 7,6 7,6 7,8 



-v' 7,2 7,3 - 7,5 7,4 7,1 



Length of m^ 6,4 7,3 ~ 7 7,5 7^0 



'^ ^' 8,5 7,4 - 7,5 8,0 7,2 



'' v' 7,8 6,9 ■ - 7,7 7,5 7,2 



To prove the variation of the molars of the Coati from 

 Miritiba the foUowing measurements of a fourth male may 

 be recorded: 



right, left right, left 



m^• breadth .... 7,0 (7,3) length C,8 (7,0) 



^^'' ->-> .... 7,0 (7,8) » 7,2 (7,0) 



V^-' » .... 7,5 (7,2) » 6,8 (7,0) 



Since it has been set forth, that the rufous Coati of 

 Baeza represents a subspecies of the rufous Coati of North- 

 eastern Brazil, it may be suitable to discuss the relationship 

 of that one to other Brazilian Coatis. It appears to me, 

 that in spite of the very great variability of the Coatis, it 

 is quite easy to distinguish two well defined forms, which 

 really deserve to be regarded as speoies, and one of which 

 is to be regarded as Nasua nasua of Linnaeus. The other 

 has generally been included under the same name and both 

 have also been mixed up under the names »socialis» and 

 y>solitaria», which latter name, as has been shown by Hensel 

 and others, only belongs to single living old males of the 

 same kind as »socialis». The nomenclature of the Nasuas in 

 the oider literature has been very confused, but J. A. Allén 

 has in a very thorough manner discussed^ this and satis- 

 factorily proved that all names given to Brazilian Coatis 

 were synonymous with Nasua nasua Lin. Hensel, who 

 worked in Southern Brazil, really observed that Coatis, which 

 he saw ta med in Rio Janeiro, differed from those he had 

 met with in a wild state by their reddish colour, and he 

 believed them to have been brougth there from Bahia or 



^ On the Coatis (Genus Nama Storr), Bull. U. S. Geol. & Geocr. 

 Survey. Vol. V, 1879, Art. X. ^ 



