Bulletins of American paleontology . the uprising of that one whichis opposite the vacant space. The teeth, though very numer-ous, differ but little in form, though tliey differ more in most remarkable difference may be observed on compar-inothe symphysal teeth, or middle row with those on eacl;-iile. Thus. Fig. -id. shows a front section of the lower jawti the (lalrocerdo ardicus; the outer Iow standing ujuight. Fig. tlxtse behind lying flat, and the middle teeth consisting of aseries of small ones. This figure, therefore, is a type bywhich the reader may compare the prevailing
Bulletins of American paleontology . the uprising of that one whichis opposite the vacant space. The teeth, though very numer-ous, differ but little in form, though tliey differ more in most remarkable difference may be observed on compar-inothe symphysal teeth, or middle row with those on eacl;-iile. Thus. Fig. -id. shows a front section of the lower jawti the (lalrocerdo ardicus; the outer Iow standing ujuight. Fig. tlxtse behind lying flat, and the middle teeth consisting of aseries of small ones. This figure, therefore, is a type bywhich the reader may compare the prevailing arrangementsin the existing, as w^ell as in this extinct family of fishes. 136 Bulletin 249 north-caeolina geological survey. 227 GENUS CARCIIAEGDON. SMITH. Teeth very large, broad, triangular and rather iiniformiydentated in both jaAvs. The enamel is usually cracked longi-tudinally; roots massive and divergent; inside nearly flat:surfaces smooth, and scarcely ever striated. CARCIIARODON MEGALODON.—AGASS. (Fig. 50.) This species has the form of an equilateral triangle, thougl
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