These lobes are cut longitudinally. Ideally each section of a single lobe contains practically all of the maturational steps in sperm development. These sections are missing the initial stage, spermatogonia. These testis consists of many lobes, the pointed ends open into the vas deferens, or sperm ducts. Each lobe contains many cysts, separated from each other by connective tissue partitions or septa. These cysts are composed of cells in the same stage of development. At the blunt or apical end of the lobe there are many small primordial germ cells, each known as a spermatogonium, and all undergoing mitosis. This mitotic activity produces the cysts. From the blunt to the pointed end the cysts show progressive stages of maturation. Differentiating and mature spermatozoa can be seen where the lobe is to join the vas deferens. These testis are from the lubber grasshopper, Rhomaleum