346 THE ZOOLOGIST. 



aureus, Felis ocreata, Hystrix cristata, Lepus mediterraneus, &c, 

 semble un residu de la faune de l'Epoque Tertiaire." 



In the treatment of species a binomial and analytical method 

 is employed. The genus Mus is liberally treated, though M. 

 flavicollis, Melch., is not considered as distinct from M. sylvaticus, 

 as recently advocated by a writer in these pages. But all these 

 different representatives of Mus, whether regarded as species, 

 varietal or geographical forms, are clearly diagnosed and their 

 localities detailed. Difference of view on these questions seems 

 to be as clearly found among mammalogists as among other 

 zoological specialists, and will probably continue as the classi- 

 ficatory pendulum sways between the analytic and synthetic 

 foundations. 



Prof. Trouessart's volume will sustain the reputation of its 

 writer ; it is published at a time when we believe other works 

 of a similar or somewhat similar character will also shortly 

 appear. 



