Aldmm. 1 
MAMMALIA. 
BY 
R. Lydekker, B.A., F.G.S. 
The work of the year 1891 has been unusually heavy for the Recorder, on 
account of the excessive number of new generic and specific names pro- 
posed for the Tertiary Mammals of South America — names which in many 
instances are scarcely published by one writer, when they are relegated 
to the rank of synonyms by another. In addition to the above, a number 
of new generic terms have been proposed for recent forms — the majority 
to replace preoccupied names, but a few for new types. 
The great event of the year has been the full description of the new 
Marsupial, Notoryctes , from the deserts of Australia ; but the discovery 
of a new type of African Gazelle ( Ammodorcas ), described by Mr. O. 
Thomas, likewise calls for special notice. A circumstance which is per- 
haps unique in the annals of mammology, is the description of a new 
genus ( Trichomanis ) of living Mammals, of which the type and only 
known example has been lost. 
Kukenthal’s researches on the teeth of foetal Mammals — more 
especially Marsupials and Cetaceans— promise to revolutionize the pre- 
valent ideas as to the relationship of the permanent with the deciduous 
dentition. 
Among works calling for especial notice, we may refer to the com- 
pletion of Blanford’s “ Mammals of British India” ; to W. L. Sclater’s 
“ Catalogue of Mammalia in the Indian Museum ” ; to the “Introduction , 
to the Study of Mammals,” by Flower and the present writer ; and also 
to the third edition of c ‘ Brehm’s Tierleben,” in which the Mammals are 
completed. Weber’s monograph of Manis may also be referred to as an 
exhaustive treatise on its subject. 
Among fossil Mammals, F. Major has made an important contribution 
to our knowledge of the Giraflklaz ; while l)Eptf,RET and Lemoine in 
* An asterisk prefixed to a quotation indicates that the Recorder has not seen 
the work referred to. 
1891. [vol. xxviii.] o 1 
