QUARTERLY CHRONICLE OF MICROSCOPICAL 
SCIENCE. 
GERMANY.—Zeitschrift f. Wissensch. Zoologie. —Vol. 
xvii, Part III. July, 1867. 
1. “* On the Development of the Tissue of the Membranous 
Cochlea,” by Dr. C. Hasse, of Gottingen. 
2. ** Supplementary Remarks on the Anatomy of the 
Cochlea in Birds,” by the same. 
The former of these communications gives the results of 
an investigation into the development of the tissues of the 
Membranous Cochlea, undertaken with the view of com- 
pleting and establishing those which had been arrived at by 
the author in two previous memoirs, one entitled “ De 
Cochled Avium,” and the other, which has appeared in the 
present volume of the Zeitschrift ’ (p. 56), ‘* Die Schnecke der 
Vogel.” Dr. Hasse also considers that his researches may 
give a further stimulus to the study of a subject which, in 
his opinion, affords. the prospect of an abundant harvest of 
discovery. 
His inquiry has been confined entirely to the development 
of the Cochlea in the chick, but he considers that the results 
will be found equally applicable to the same part in man 
and other animals. 
The researches were made in sections, partly of the iso- 
lated membranous Cochlea, and partly of the same part 
remaining in its chamber or case. In order to isolate the 
Cochlea, the brain is to be removed and the inner wall of 
the cranium exposed, when the situation of the Cochlea will 
be readily recognised by its shining appearance through the 
walls. The surrounding tissues being then carefully torn 
away under the microscope, by means of a fine knife or 
needles, the Cochilea is easily detached. It is then placed in 
strong alcohol till nenones and thin transverse sections of it 
can be made. 
