1891.] Recent Literature. IIIJ 
tism, a quality which is 
of great value in restrain- 
ing the tendency to 
excessive subdivision 
usual among tyros in 
| zoology. In some cases, 
however, we incline to 
think it carried too far : 
as, for instance, when 
the African rhinoceroses 
are retained in the same 
genus with the“ Indian 
species ; and where all 
ungulate Mammalia are 
included in a single 
order. A little more con- 
N l servatism would have 
rol, Tilecelencarnfes Owen, Extinct earte been consistently shown 
natural size in the treatment of the 
Artiodactyla, where the two untenable families Giraffidee and Anti- 
locapride are admitted, and the long list of genera of antelopes is 
adopted. In the matter 
of the genera of ante- 
lopes, European authors 
have been apparently un- 
consciously influenced 
y the number of species 
at their disposal, rather 
than by an observance 
of the rules they have 
followed in other divi- 
sions. 
A few points where 
the authors have fallen 
into error in the matter 
of American forms may 
be noticed for the bene- 
fit of future editions of 
the book. Tillodontia 
are placed under Un- 
gulata, but they are dis- 
tinctly unguiculate ; so 
also are Chalicotheriidz 


ee 

FIG. 3.—Dinotherium giganteum Kaup. Extinct probo- 
which are placed in the sidian from Germany ; one-tenth natural size, From Kaup. 



