ZOOLoGY JOURNAL CLUB Rebstock 518 4:00 P.M. November 10, 1942 PHOTOFLASH OF SQUID GIANT AXONS Dr. H. Burr Steinbach Department of Zoology, Washington University Because of their size the giant axons of the squid have proven very favorable material for electrical and chem- ical studies. It has also been possible to gain some infor- mation about the localization of certain enzyme systems. Ear- lier work will be reviewed and some electron microscope stu- dies discussed. In the axoplasm small particulate units have been observed which apparently align themselves under certain conditions to form microfibrils.