468 Analytical Notices of Books. 
the entire skeletons and skulls which he was enabled to bring with him 
to Europe. 
From these materials he has produced a very interesting volume, not 
merely to the scientific reader, but also to the world at large ; adding 
as it does to very minute descriptions, and valuable discussions on the 
synonymy of the species, extensive details of their habits and modes of 
life, derived chiefly from personal observation. In this latter part of 
his subject, which renders his book as amusing as it is instructive, he 
frequently corrects his predecessor D’Azara, who appears to have 
relied more on accounts furnished by natives than is either safe or 
prudent. 
The volume commences with the physical description of the native 
inhabitants of Paraguay, which the authour limits to the kind of penin- 
sula formed by the rivers Paraguay and Parana, from their union as far 
North as 21° S. lat. Within this tract of country he has met with 68 
species of Mammalia, which we shall proceed to enumerate, making a 
few observations on those which seem to require elucidation, Only 
three species of Monkeys are noticed: viz. 1. Mycetes Caraya, Desm. ; 
2. Cebus Azare, Rengg.; and 3. Myctipithecus trivirgatus: the Caraya, 
Cay, and Mirikina of the natives. The first and last are now well 
known species; the second is meant to include all the varieties, as the 
authour considers them, of the Paraguayan species of Cebus. In corro- 
boration of this opinion he describes numerous individuals varying 
greatly in the nature and intensity of their colouring, even in the same 
family ; thus affording strong grounds of suspicion that the number of 
species in this genus has been greatly and unnecessarily augmented by 
the adoption of slight differences of colour as a sufficient ground of 
separation. The Chetroptera observed are more numerous: they are 
4. Phyllostoma superciliatum, Wied; 5. Phyll. lineatum, Geoff.; 6. 
Phyll. infundibuliforme, Rengg. : 7. Phyll. Lilium, Geoff. ; 8. Glosso- 
phaga villosa, Rengg.; 9. Vespertilio villosissima, Geoff.; 10. Vesp. 
nigricans, Wied; 11. Molossus laticaudatus, Geoff.; 12. Mol. 
cecus, Rengg.; 13. Mol. crassicaudatus, Geoff.; 14. Mol. casta- 
neus, Geoff.; 15. Noctilio dorsatus, Wied; and 16. Woct. ruber, 
