Ward, E. W. B., and K. W. Ciurysek. (Canada Department of Agriculture, Edmonton, Alberta.) Somatic mitosis in Neurospora crassa. Amer. Jour. Bot. 49(4): 393–399. Illus. 1962.—The process of nuclear division in the vegetative mycelium of Neurospora crassa was studied with the aid of the HCl‐Giemsa staining technique. Division followed the conventional mitotic sequence and 7 morphologically distinct chromosomes were demonstrated at metaphase. The findings are discussed in relation to other proposed schemes of nuclear division in the fungi.

The nuclei in stained preparations of the mycelium of an unidentified basidiomycete were shown to divide by mitosis. Typical stages of division with the esception of early prophase were clearly distinguished and the haploid chromosome number was shown to be 4. The view that the fungus is a basidiomycete was confirmed by the demonstration of conjugate nuclei and clamp connections.' Manuscript received March 31, 1961. Contribution No.