Some Notes on the Brain and Pineal Structures of Polyodon folium

Abstract

Some time about 1888 the writer of these notes made several dissections of the brain of this interesting- fish and drawings of them were made by Magnus Westergren, at that time Artist of the Illinois State Laboratory of Natural History. Other duties have until recently prevented further prosecution of the study, but I have now to present some of the results of a reexamination
of these dissections, kindly placed in my hands by Professor Forbes, together with some facts gained by a study of fresh material obtained by me from the Ohio River. For purposes of comparison I have dissected out the brain of our common sturgeon {Acipenser rubicundus).