The writer has previously (1946) described microspore types from Queensland Permian coals. This work is now extended to the Triassic by a description of microspore types from the Ipswich series of south-eastern Queensland. In this investigation the technique used for isolating the microspores has been the same as described in the previous paper and also the same method of classification has been used, the initial letter T of course being substituted for P to indicate the Triassic age of each spore type.
Since publication of the writer's previous paper, Balme (1949) has described microspore types from the Permian coals of Western Australia. These types have also been classified in accordance with Dulhunty's classification, and although the work is as yet unpublished, it has been considered desirable to use letters other than the unpublished ones of Balme for the Triassic types. For example, a Triassic type close to, but not identical with Balme's P3D, is classified as T3E even though P3D has not yet been described in print