1880.] MR. O. THOMAS ON MAMMALS FROM ECUADOR. 



393 



6. On Mammals from Ecuador. By Oldfield Thomas, 

 F.Z.S., Assistant in the Zoological Department, British 

 Museum. 



[EeceiTed April 19, 1880.] 

 (Plate XXXVIII.) 



The collectiou to which this paper chiefly refers was brought from 

 Ecuador by Mr. Clarence Buckley, together witi, a large uSmber of 

 birds and other animals obtained by him during his four years' resi- 

 dence m that country. It consists of 141 specimens, belonging to 

 ^8 species Ihe specimens are all in an excellent state of meser- 

 vation; and a nearly complete set has been selected for the British 

 Museum. I have also included in my notes a small collection from 

 the same region received by the British Museum from Mr. Illiu<.wordi 

 contaming 12 specimens belonging to 10 species-the total numbei' 

 Of species being thus increased to 41. 



The collection onlj contains one undoubted new species, Bassari- 

 cyon allem, an animal especially interesting both by its beino- the 

 only known specimen of the genus which shows the e.Kternafcha- 

 S? T \^?:'^o ^^"^'Ykable instance of mimicry which it 

 exhibits. TwooftheSqmrrelsare also interesting as forming the 

 bng^-expected links between 5". cestuans, L., and 8. griseoyenys, 



On the whole this collection confirms the correctness of the views 

 expressed by Messrs. Newton and Salvia on the division of the 

 Aeotropical Region mto subregions, as published in the new edition 

 of the Encyclopaedia Britannica." In their opinion the eastern 

 part of Ecuador belongs to the Amazonian subregion ; and we there- 

 fore find in this collection a very great preponderance of Amazonian 

 lorms with a k^ species belonging to other subregions, such as 

 Mycetesmger, which is a South -Brazilian type, Tapirus roulini, a 

 Sub-Andean, m<i tariacus rufnus, tlie range of which, according to 

 Sir Victor Brooke-, extends from Guatemala to Ecuador. 



llie only papers hitherto published on the Mammals of Ecuador 

 so far as I am aware, are those by Mr. Tcmes^ referring to the sne-' 

 cimens obtained by Mr. Eraser at Gualaquiza and Palatanga These 

 papers, however, deal almost entirely with the Chiroptera and Ro- 

 dentia, m which orders Mr. Buckley's collection is especially defi- 

 cient, so that I am unable to draw any comparisons between the two 

 Ihe localities and dates at which the collections were made were 

 as tollows : — 



Sarayacu^ on the Bobonasa river. Upper Pastasa river. 

 Copataza river about 50 miles S.E. of Sarayacn, a tributary of the 

 Pastasa The specimens from this locality were obtained be- 

 tween December 18/7 and February 1878. 

 ^ Vol. iii. p. 744. 2 p 7 Q 1 070 n.i- 



; P Z. S. isoB, p. 54G ; 1860, pp. 211 & 260 '^^' ^' ^''• 



on the UeT5 rpSr'""'"' "'*'^ '^^ ^^^^ ^^^'S^^- '^^ ''^^*- ^-- ^arayacu 



