An analysis of the distribution of volumes amongst spores of the cellular slime mould Dictyostelium discoideum.

R E ~ N , E. REYES and J. RUfZ-HERRERA Genus Candida. By A. LETH BAK and A. STENDERUP BRAITH and J. E. SMITH . By B. L. BRADY . LIPPINCOTT and B. B. LIPPINCOTT . Influence of Oxygen on Maltose Metabolism by Mucor rouxii. By A. FLORES-CARDeoxyribonucleic Acid Homology in Yeasts. Genetic Relatedness within the Sporulation of Aspergillus niger in Submerged Liquid Culture. By J. C. GALThe Acylamide Amidohydrolase of Candida utilis : Purification and Properties. Tumour-initiating Ability and Nutrition in the Genus Agrobacterium. By J. A. Genetic Mapping of the phoR Regulator Gene of Alkaline Phosphatase in Steady State Operation of a Continuous Culture at Maximum Growth Rate by The Lysis of Cholera and El Tor Vibrios. By P. C. ADHIKARI, C. RAYCHAUDPyruvate Carboxylase in Rhodopseudomonas spheroides. By J. PAYNE and J. G. Cell-wall Proteins of Aspergillus niger and Chaetomium globosum. By A. D. End-product Control of Acetohydroxyacid Synthetase by Valine in Penicillium chrysogenum ~ 1 7 6 and a High Penicillin-yielding Mutant. By S. A. GOULDEN and F. W. CHATTAWAY Aflatoxin Production by Some Indian Strains of Aspergillus JIavus Link ex Fries. By K. K. MAGGON, L. VISWANATHAN, T. A. VENKITASUBRAMANIAN and K. G. MUKERJI . Production-of a Milk-clotting Enzyme Preparation by Aspergillus niger and the Effect of Various Factors on its Activity. By H. G. OSMAN, A. F. ABDELFATTAH, M. ABDEL-SAMIE and S. S. MABROUK . .