. Cretaceous reptiles of the United States. Reptiles, Fossil; Paleontology; Paleontology. Jersey, belonging to the museum of the Academy of Natural Sciences. It is represented in Fig. 3, Plate X, and was previously indicated and figured by Harlan' and Morton.^ In form it resembles the corresponding portion of the teeth above described, but is slightly larger. Its dividing ridges are distinctly denticulated; the outer surface is divided towards the base of the crown into four planes, which diminish and finally disappear towards the apex; the inner surface is divided into eleven planes, which al
. Cretaceous reptiles of the United States. Reptiles, Fossil; Paleontology; Paleontology. Jersey, belonging to the museum of the Academy of Natural Sciences. It is represented in Fig. 3, Plate X, and was previously indicated and figured by Harlan' and Morton.^ In form it resembles the corresponding portion of the teeth above described, but is slightly larger. Its dividing ridges are distinctly denticulated; the outer surface is divided towards the base of the crown into four planes, which diminish and finally disappear towards the apex; the inner surface is divided into eleven planes, which also diminish and become obsolete towards the apex. The length of the crown when perfect has been about two inches and three-quarters; the antero-posterior diameter at base about thirteen lines; and the transverse diameter is fourteen lines and a half. The base of the specimen is excavated in a trumpet-like manner, extending to a thin edge at the periphery of the crown. This condition evidently indicates the specimen to have been shed during the life of the animal, notwithstanding the little wearing to which the tooth appears to have been subjected. The accompanying outlines. No. 3, represent sections from the base, middle, and near the apex of the specimen. 6. The shed crown of a tooth, from Burlington County, New Jersey, presented to the Academy of Natural Sciences by Mr. L. T. Germain. The specimen, repre- sented in Fig. 6, Plate X, has the apex and base broken, but when perfect appears to have been less than two inches and a half long, about thirteen hues in diameter antero-posteriorly and twelve lines transversely. The ridges of the crown are distinctly denticulated, but separate the surfaces less unequally than in the preceding specimens. The outer surface is subdivided into nine planes, passing into seven and then becoming obsolete towards the apex of the crown. The ^**' ^' inner surface is subdivided into about twenty planes, diminishing and finally disappearing towards t
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectpaleontology, bookyea
