REPORT OF 
THE PROSECTOR 
TO THE BOARD OF MANAGERS 
BEG to submit the following Report covering the operations 
of the Prosector’s Department for the past year. 
The material received from the Society’s Collections con- 
sisted of seventy-seven mammals distributed among the orders 
as follows: 
| BAT ert a2 TOPS ns econ tras cA Ere Pee oe ME es ee a ee RD 24 
(CEB ANIA 0) Ge aren APRS nthe A ert reise AOR RRL URE 5" Rr Rallies oe hD a PPO oar 18 
| Eb 3 (SS ALES eis Be So Oe ont Or Fook PP OL eds Sala, <1 Pony ae ERR 3 
1BOY0 (LOE eRe Res ARAN SND: Bey SMS ole eeaiate Cae Shoe EZ 
AVE AT Sta MUTA vacee coca ceee auacreseiaes Manto doocer hen eerie cane ie 
PO Pallas ecatines viet ene eee cead de naa ected ke tor a nome ee Wel 
There was also received one specimen of the Australian lung- 
fish, Ceratodus. 
A number of living specimens of Acanthias were supplied 
for anatomical and experimental work on the nervous system 
by the New York Aquarium. 
The material has been used, as in previous years, in prose- 
cuting the work of the Department in morphological research 
and teaching. 
Especial reference should be made to the progress of the in- 
vestigation of the primate brain stem carried out by the depart- 
ment under Professor Tilney. This has advanced to a very satis- 
factory stage making it possible to establish the absolute nuclear 
homologies in the anthropoid and human brain. The scope of 
this work includes reconstructions of the gray matter of the 
brain stems, based on complete serial sections, from the medulla 
up to and through the optic thalamus, permitting a comparative 
analysis of the active substance (gray matter) in the brain of 
the following forms: 
