II Proceedings of the Association of American Anatomists 
stages the acoustic ganglion consists of an upper and lower division. On 
the ventral border of the latter a portion of the ganglion cells of this di- 
vision become massed together into a separate bud, and form the primitive 
ganglion cochlearis; in other words, the acoustic ganglion at this stage 
consists of an upper division entirely vestibular, and a lower division — 
partly vestibular and partly cochlear. As the differentiation proceeds the 
group of cells forming the cochlear ganglion continues to become more 
distinctly separated from the rest of the acoustic mass, and gradually as- 
sumes the spiral form, seen in the adult. 
The nervus cochlearis sprouts out from the ganglion cochlearis com- 
paratively late, and passes up along the median side of the acoustic mass, 
without joining with the nerves to the sacculus and the posterior ampulla. 
Contrary to the younger His, the author concludes that the nerves to the 
sacculus and posterior ampulla belong to the vestibular rather than the 
cochlear division of the acoustic nerve. 
PROCEEDINGS OF THE ASSOCIATION OF 
AMERICAN ANATOMISTS. 
TWENTIETH SESSION: 
In the Medical Building, Laboratories of Anatomy and Histology and 
Embryology, University of Michigan, Ann Arbor, Michigan, 
December 27, 28 and 29, 1905. 
At its business sessions the Association took the following actions: 
The minutes of the Secretary as printed in the American Journal of 
Anatomy, Vol. IV, No. 2, pages I-II, were approved. 
The Association received a communication from Prof. Burt G. Wilder, 
Chairman of the Committee on Brain Requests and Methods, stating that 
this committee had held one meeting, but were as yet not prepared to 
make a formal report. The committee asks to be continued. 
On motion this report was accepted and the committee continued. 
The permanent secretary of the American Association for the Advance- 
ment of Science, Doctor L. O. Howard, states that this association would 
be pleased to have the Association of American Anatomists meet in affili- 
ation with the A. A. A. 8S. during convocation week, 1906, in New York 
City. It was informally agreed that if the Association of American 
Anatomists should meet during convocation week (1906), they would in 
all probability meet in New York City. 
In response to a request from the secretary of the Committee of Ar- 
