. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. CRANIAL MORPHOLOGY OF PRISTERODON BUFFALOENSIS 133 Skull No. 339 was serially sectioned by means of the parallel grinding method, leaving exposed transverse sections at intervals of 200 micron. As it was possible to determine the general outline of the skull the specimen could be orientated for sectioning without removal of the matrix. This had the advantage that clear definition was obtained between matrix and bones and obviated the possibility of accidental grooving or pitting of the bones t
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. CRANIAL MORPHOLOGY OF PRISTERODON BUFFALOENSIS 133 Skull No. 339 was serially sectioned by means of the parallel grinding method, leaving exposed transverse sections at intervals of 200 micron. As it was possible to determine the general outline of the skull the specimen could be orientated for sectioning without removal of the matrix. This had the advantage that clear definition was obtained between matrix and bones and obviated the possibility of accidental grooving or pitting of the bones through mechanical cleaning. Three thin metal rods, fixed parallel to the cranial axis, served as base-lines for the transverse orientation of the skull before imbedding in 'Callistone' plaster of Paris. In this investigation use was made of a Croft Parallel Grinder. Under normal circumstances the grinding method offers an accurate and satisfactory picture of the relationships of the bones, and supplies information about the internal structures which are not readily available from other methods of. Fig. 1. Pristerodon buffaloensis. Dorsal view of skull reconstructed from serial sections. Abbrevia- tions on p. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
