482 Bibliographical Notices. 
Prof. C. $8. Roy contains the clearest explanation of aerial motion 
with which we are acquainted; and Dr. Shufeldt, formerly of the 
United States Army, has assisted. It only remains to say, as an 
indication of the care bestowed upon the work, that the Notanda et 
Corrigenda occupy nearly 4 pp. of small print. 
Trouessart’s ‘ Catalogus Mammalium. Fasciculus III., completing 
the Rodentia, pp. 453-664, Berlin, 1897. 
Tue issue of the third fasciculus of this important work so closely 
following the second shows that the author is well advanced with 
his material, Needless to say, the present part maintains the high 
level of its predecessors, and Dr. Trouessart is to be congratulated 
on having got through such a difficult group as the Rodentia, 
especially when fossil forms have to be wedged in among their 
recent relatives. 
In this section the author has had the advantage of consulting 
Mr. Thomas’s recent revision of the Rodentia, which appeared too 
late for incorporation in the preceding part. While adopting the 
revision to a great extent, Dr. Trouessart has seen reason to depart 
from it in some particulars: notably, he refuses to admit the super- 
session of the familiar Myovus by the forgotten Glis, and conse- 
quently retains Myoxide in place of Gliride. Whether the reasons 
he gives for the retention will be accepted by the “innovation 
school” remains to be seen: it is to be hoped they will. Most, 
zoologists will be glad to see that Cricetus retains its place against 
Hamster; and it appears that this settlement rests on a firmly 
established basis of fact. The adoption of the barbarous Cowendu 
for the South-American Tree-Porcupines is, however, distinctly to 
be regretted, and still more so the substitution of the new Coendide 
for the Erithizontide of Mr. Thomas. It appears that the reason 
for this substitution is the mistaken notion that the earliest generic 
name in a family must necessarily be the one from which the 
family name is taken. 
In regard to extinct forms, it isa pity that the author regards 
the Tertiary beds of Patagonia as of Eocene age, and still more so 
that he admits the endless host of nominal species which have been 
named by the Argentine paleontologists. 
It is also a subject for regret that the references to the various 
genera throughout the work have not been given, instead of merely 
the date of publication. Errors and misprints are exceedingly few ; 
but since the author adheres to the original spelling of names, there 
is no doubt that Limacomys (p. 470) should stand as Leimacomys, 
although the former is really the proper way of transliterating. 
We look forward to have ere long the pleasure of congratulating 
Dr, Trouessart on the completion of his arduous task. R. LL. 
