600 THE AMERICAN NA TURALLIST. [Vor. XXXV. 
To remedy this defect Schellenberg (Jena. Zeitschr., Bd. XXXIV, 
p. 113) has made an extended study of the medullary parts of the 
brains of goats, sheep, oxen, horses, and swine. In all these the cen- 
trum ovale is relatively small. The excessive size of the fibrous masses 
in the frontal lobes of swine is attributed to the well-developed sense 
of smell in these animals. In a similar way the great masses of 
medullary substance in the occipital lobes of the goat are supposed 
to be associated with the well-known quickness of sight of this 
animal. The fornix was about equally developed in all the ungu- 
lates studied, but the corpus callosum was relatively most prominent 
in the goat. As this organ is suspected of being connected with the 
associative operations of the cortex, its great size in the goat may be 
an indication of the rather remarkable psychical qualities of this 
animal as contrasted with sheep, etc. 
BOTANY. 
The Phytogeography of Nebraska! appears in a new and revised 
edition, in the preface to which the authors state that the greater 
portion of the first edition was destroyed in a fire that consumed the 
publisher's buildings. We cannot but rejoice in the calamity, for 
we ever felt that the form in which the work was cast was an injustice 
to its exceeding high merit and true worth. We cannot, however, but 
regret that the opportunity was not taken advantage of to carry the 
revision still farther. In our opinion it would have been better to 
have entirely reédified the structure on a new foundation. . The very 
excellent material was deserving of this. Rapid as has been the 
evolution of the two volumes, — witness the timely insertion relative 
to frequence and abundance, so conspicuously absent from the first 
edition ; the better treatment of the important factor of light, — these 
but examples of numerous improvements, — yet we cannot but feel 
that the present method of treating the habitat group is the peur 
cious root of much evil that afflicts our ecological classification. 
The habitat group should be relegated to an inferior position, OT 
better abolished altogether, than as at present producing turgidity In 
what would by a more logical treatment be perfectly clear. Without 
! Pound, Roscoe, and Clements, F. E. The 'Phytogeography of Nebraska. : 
L General Survey. Published by the Botanical Seminar of the University of 
Nebraska. Lincoln, 1900. Second edition. 422 pp., with four maps. 
