1897. SOME NEW BOOKS. 340 



and admirably selected number of references he has given and on the 

 way in which he has been able to bring them absolutely up to date. 

 We notice, however, that in the part on the Bats, no reference to 

 Blanford's "Mammals of India" is given, while in that on the 

 Primates the work is referred to continually, but as 1891 instead of 

 1888, the latter date being correctly quoted in the Prosimiae and 

 Insectivora. 



We do not quite understand on what grounds Dr. Trouessart 

 rejects all the names recently given by Mr. Lydekker to genera of bats 

 and returns to the pre-occupied names used by Dobson, and similarly 

 adopts Brachyuvus for the Ouakari monkeys. If he does not admit that 

 pre-occupation invalidates a name, he ought surely to use the widely- 

 known Troglodytes for the Chimpanzee, instead of the technically 

 correct Anthropopithecus. He has also often rightly re-named pre- 

 occupied names himself. 



These slight blemishes apart, Dr. Trouessart has given us a work 

 which will have to be in the library of every mammalogist, and, when 

 there, will probably be of more use than the great majority of more 

 pretentious works. O.T. 



A Guide to Geological Literature. 

 Catalogue des Bibliographies Geologiques. Par E. de Margerie. Pp. xx., 733. 

 Paris : Gauthier-Villars, 1896. 



This most useful work is produced under the auspices of the Inter- 

 national Geological Congress, which in i8gi and again in 1894. 

 appointed a Committee for the purpose. Though help has been 

 received from the members of this Committee, every item has been 

 checked and the whole arranged by Mr. de Margerie himself. There 

 are nowadays so many bibliographies or bibliographic lists published 

 for the guidance of the student, that they themselves require a 

 bibliography. A geologist wishing to consult the literature of any 

 subject will therefore begin with the present work, which will tell him, 

 not what books have actually been written about the subject, but what 

 books contain lists of the literature pertaining to the subject ; to such 

 books he will next turn, and so be guided ultimately to the literature 

 itself. 



The work is divided into a " Partie Generale" and a " Partie 

 Regionale." The former contains histories and bibliographies of 

 general geology, periodical bibligraphies, personal bibliographies (i.e., 

 author-catalogues), subject-bibliographies, and geographical geology 

 including map-lists. The regional part is divided according to 

 countries, and each of these is subdivided in much the same way as 

 the general part, but contains in addition lists of Survey publications 

 and library-catalogues. In both sections the term bibliography has 

 received a wide interpretation ; thus, the list includes H. S. Williams : 

 "The scope of paleontology" which is really historical, as well 

 as many items that have little more than a biographical interest. 

 Bibliographies still in MS. are also entered : thus, we find C. D. 

 Sherborn's " Index Animalium." There are three indices : of 

 authors, subjects, and countries. 



In a work so embracing, perhaps too much so, one could hardly 

 fail to note many omissions, some of them serious. It seems, however, 

 more profitable to send additions and corrections to Mr. de Margerie, 

 at 132 rue de Grenelle, Paris, and we hope that other users of the 

 work will follow our example. Copies of the work are presented to 

 geologists who attended the congresses at Washington and Zurich, 

 while others may purchase it for (we believe) £1. 



