
I118 The American Naturalist. [December, 
Perissodactyla. The Coryphodon elephantopus Cope is figured as 
C. hamatus Marsh, If the figures of the latter given by Marsh are 
correct, it belongs to both a species and genus distinct from the 
former. The name of the creodont genus Oxyzena should not be 
spelled Oxhyzena, as the first syllable of the word hyzna does not 
enter into its composition, (Dr. Lydekker would also spell the saurian 
genus Platecarpus ‘‘ Platycarpus,’’ although its etymology was stated to 
be from zAary, an oar, and not from zdatug, flat.) The cameloid genus 
Eschatius includes only the species Æ. conidens, and not the Holomen- 
iscus vitakerianus. ‘These slight blemishes can be easily removed ; 
and we will hope that a further consideration of the subject will lead 
tosome modification of the systematic arrangement of the orders in a 

FIG. 4.—Dorcatherium aquaticum; West Africa. From Flower and Lydekker. 
future edition. Paleontological research has shown that the unguiculate 
and ungulate series are distinct from the phylogenetic standpoint, the 
former remaining tritubercular in molar dentition, while the latter 
became early quaditubercular and lophodont, and mainly continued so. 
The natural character of the order Edentata has been demonstrated 
by paleontology, and it is treated accordingly in the work before us. 
An especially valuable section is that devoted to man, which constitutes 
the most valuable popular review of the subject of physical anthro- 
pology that we have. 
This book is the only comprehensive one on the Mammalia in the 
English language, and we know of no better one in any language— 
E. D. Corr. _ 



