'Fossil Aggregation' Referring especially to statistical studies of assemblages of smaller foraminifera

1., An aggregation of foraminifera considered in two previfus showed many differences from recent aggregations which are being studied by ecologists., 2., The author discussed the characteristic nature of "fossil aggregations", the relation betweent tne fossil aggregation itself and the amount of sample to be used in its statistical study, and the influence of size of foraminifera, etc., ., 3., This paper is a supplement to the two former papers on statistical studies of foraminifera aggregations.