THE KARROO SYSTEM AND ITS EQUIVALENTS At a meeting held in Nairobi in September, 1954, the Association of Mrican Geological Surveys discussed, and approved in principle, a suggestion for the compilation of a bibliography oi African geology. The Scientific Council for Africa, at its Vth Meeting in Pretoria (September, 1954), drew special attention to this matter, and considered that so large an undertaking might be appropriate for financial assistance from the Inter-African Research Fund. As a matter of personal Interest, the compiler has maintained for a number of years a card catalogue, under authors' names, of papers dealing with the stratigraphy and palaeontology of the Karroo system.......: but not of the petrology of the igneous rocks associated with it-which have come to his notice. It appeared that this catalogue might form a satisfactory foundation on which to build a complete bibliography of papers dealing with this system in Africa south of the Sahara; excluding the igneous rocks. In order to assure its completeness, Directors of Geological Surveys of the territories included in the region were requested to scrutinise, amend and, if necessary, enlarge the lists of entries referring to their countries which were submitted to them. Their cordial cooperation in the task of checking was readily forthcoming and, as a result, it is expected that the present list, which extends to the end of_ the year 1954, has few lacunae.