Proceedings of the National Institute of Sciences of India. November-December 1948

(1902) concern the identification of the `nucleolus' of Wager as the real nucleus and a discussion as to the minor details of its structure. [...] Guilliermond's description agrees with the above while Wager and Peniston (1910) consider that the division of the 'nucleolus ' is followed by that of the 'vacuole ' and that one of the products of division of the `nucleolus' along with a 'vacuole ' containing chromatin granules passes into the bud. [...] The above changes were compared by Macallum to the divsion of the nucleus in Euglena in view of the then belief that in Euglena as in other Protozoa the division of the nucleus was by amitosis. [...] On the above assumption he tries to suggest that the stages of mitosis seen by the two investigators are merely demonstrations of the variable structure of the nuclei which present at different stages different dispositions of the chromatin network. [...] Under the circumstances we have only one of the criteria to evaluate the validity of the identification of a particular structure in the yeast cell as the nucleus.