MORPHOLOGY OF THE AVIAN BRAIN. 



I.— TAXONOMIC VALUE OF THE AVIAN BRAIN AND 

 THE HISTOLOGY OF THE CEREBRUM. 



C. H. Turner. 



Introduction. — This communication is the first qf a series 

 of papers upon the avian brain. In these papers the author 

 does not think to exhaust the subject. If he succeeds in 

 directing attention to a much-neglected branch of neurology 

 he will consider that his labors have been well repaid. 



Material. — The remarks in this paper are based upon the 

 study of over one hundred and fifty birds, belonging to nine 

 orders, twenty lamilies, more than forty genera, and above . 

 fifty species. In most cases I have had several specimens of 

 the same species; in a few cases, however [Bubo virginiamis, 

 Botaurus imigitans , Butorides virescens, Ardea herodias) , I 

 have had only one specimen. The major part of the bird 

 brains were collected by me during the summer and autumn 

 of 1890. The remainder were donated. For these donated 

 specimens I am indebted to the following gentlemen: to 

 Professor C. L. Herrick, for a specimen of Ardea herodias 

 and several other brains; to Professor W. G. Tight, for a 

 specimen oi Botaurus nnigitans; and to Mr. C. J. Herrick, 

 for a specimen of Bubo virgii/ianus. 



I must confess that I have not read all that has been 

 written upon the avian brain; but, through the kindness of 



I Thesis offered for the degree of P>.iche!or of Science in Biology, liniv. of Cin- 

 cinnati. 



