. Breviora. BREVIORA No. 399 Ai eje|e||e • •••••••oo ooooooooooo oooooooooo All eeeeeeeeeee Bi o o e °-°»:» Bi eeeeeeeeeee Ci. Cii '/ '^ 'j C Dm/ Dm^ Dnrij Dm^ M/M^ M^ h h h c Pm^ Pnrij Pm^ FigTire 1. Ai represents Bolk's concept of the sets of alternat- ing teeth present in a reptile. All members of a set develop at the same time. Aii shows what he considered to be the homologies be- tween polyphyodont reptilian and diphyodont mammalian dentitions. Bi (reptile) and Bii (mammal) illustrate Edmund's (1960, 1962) concepts. He suggested that teeth develop in the sequence showTi by t
. Breviora. BREVIORA No. 399 Ai eje|e||e • •••••••oo ooooooooooo oooooooooo All eeeeeeeeeee Bi o o e °-°»:» Bi eeeeeeeeeee Ci. Cii '/ '^ 'j C Dm/ Dm^ Dnrij Dm^ M/M^ M^ h h h c Pm^ Pnrij Pm^ FigTire 1. Ai represents Bolk's concept of the sets of alternat- ing teeth present in a reptile. All members of a set develop at the same time. Aii shows what he considered to be the homologies be- tween polyphyodont reptilian and diphyodont mammalian dentitions. Bi (reptile) and Bii (mammal) illustrate Edmund's (1960, 1962) concepts. He suggested that teeth develop in the sequence showTi by the arrows. (Time is represented by a vertical axis.) Ci shows the actual sequence of tooth development in a primitive reptilian dentition (note alternation of teeth). Cii (arrows) shows the actual sequence in mammalian postcanine dentitions (Osborn, 1970). In all diagrams anterior is to the left and the mouth 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. , Museum of Comparative Zoology, Harvard University
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