. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. long. gr. Fig. 1.—Ericiolacerta parva. Four stages in the replacement cycle of cheek teeth. (Key to lettering, p. 255.) alveolus. In a later stage (II) attachment bone (at. bo.) was built up around the neck of the tooth above the longitudinal groove (long, gr.) which extended the length of the tooth row on the lingual side in the maxilla and dentary. Next, replacement teeth developed in pits in the base of the longitudinal groove (stage III), and as the replacing tooth increased in size, it m
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. long. gr. Fig. 1.—Ericiolacerta parva. Four stages in the replacement cycle of cheek teeth. (Key to lettering, p. 255.) alveolus. In a later stage (II) attachment bone (at. bo.) was built up around the neck of the tooth above the longitudinal groove (long, gr.) which extended the length of the tooth row on the lingual side in the maxilla and dentary. Next, replacement teeth developed in pits in the base of the longitudinal groove (stage III), and as the replacing tooth increased in size, it migrated labially and resorbed first the alveolar wall separating it from the alveolus and second the root of the functional tooth (stage IV). For description purposes the teeth are numbered consecutively from the front because no distinct canine is present. Lower dentition (figs. 2 A, B, 4 C) The 15th tooth from the front has a well-preserved unworn tricuspid crown. The central cusp is slightly higher than the accessory cusps. The outer surface of the tooth is convex, but due to a slight swelling on the inner surface of the crown a short distance below the apex of the main cusp the upper portion of the inner surface of the upper half of the crown is slightly concave (figs. 2 B, 14). The posterior lower teeth of Ericiolacerta behind the 8th all have this characteristic shape. The tooth is firmly held and the longitudinal groove does not extend as far posteriorly as this point. The 14th tooth is less firmly 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
