. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. EASTMAN : CARBONIFEROUS SHARKS. G7 injured considerably by weathering and other destructive agencies. In all, portions of about 20 fused teeth are preserved, but only four of this number still remain in their entirety or nearly so. These occur near the distal end, and have been utilized for the construction of the adjoin- ing text-figures nos. 3 and 4, which may be instructively compared with Karpinsky's text-figures nos. 23-34, or with Dr. Henry Woodward's illustrations of C. davisii. The teeth are much laterally com
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. EASTMAN : CARBONIFEROUS SHARKS. G7 injured considerably by weathering and other destructive agencies. In all, portions of about 20 fused teeth are preserved, but only four of this number still remain in their entirety or nearly so. These occur near the distal end, and have been utilized for the construction of the adjoin- ing text-figures nos. 3 and 4, which may be instructively compared with Karpinsky's text-figures nos. 23-34, or with Dr. Henry Woodward's illustrations of C. davisii. The teeth are much laterally compressed, closely apposed, and their lower portions are curved forward in such manner as to override one an- other. The latter character is more pronounced than in Campodus, less so than in Edestus and other species of Campyloprion. That the an- gulation dr curvature of the teeth is toward the front in- stead of posteriorly, is demon- strated from the arrangement known to obtain in Campodus and Helicoprion. A forward inflection is attributable to Campyloprion davisii and C. lecontei, where the smallest teeth of the series are un- questionably the oldest; and it is unlikely that the seg- ments of C. annectans were reflected in the contrary direction. The whole of the lateral surface of the crown appears to have been covered with enamel, but this has been removed in most places subse- quent to fossilization. In like marnier the curiously curved patches of dentine occurring along the sides of the principal series toward the base have been largely denuded of their enamelled coating. Some of the symphysial teeth are worn, especially toward the proximal (posterior) end, but hardly to such an extent as to suggest attrition against mutually interlocking series of the opposite jaw. The coronal outlines are every- where smooth and regular, except along the apical margin, which appears to have been coarsely serrated. This serration is best indicated on the opposite side of the series from
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