Chromatin rings as products of chromatin diminution in Cyclops

Nuclei from the interphase preceding the 6th cleavage (=first diminution) division of Cyclops furcifer were subjected to a micro-spreading technique (Counce and Meyer, 1973) and examined by electron microscopy. In some preparations numerous chromatin rings formed by 250--300 A fibers were discovered in sizes ranging from 0.25 micrometers to more than 6 micrometers. These structures are assumed to represent the primary products of chromatin diminution.