Facet counts and measurements indicate that growth in the holochroal eyes of Isotelus iowensis and Nileus vigilans is accomplished by addition of new facets at the base, probably during molting, and by increase in the size of the largest facets; the former is the dominant process. The rate of addition of facets appears to be non-uniform in many individuals.
Proceedings of the Iowa Academy of Science
©1967 Iowa Academy of Science, Inc.
Rose, J. N.
"The Eyes of lsotelus and Nileus,"
Proceedings of the Iowa Academy of Science, 74(1), 178-185.
Available at: https://scholarworks.uni.edu/pias/vol74/iss1/28