. Annual report of the Regents of the University on the condition of the State Cabinet of Natural History, with catalogues of the same. State Cabinet of Natural History (N. Y. ); Science; Museums. No. 109. 183 posterior, one large and strongly impressed, the otlicr smaller, lying above and between tlie larger one and Hie liinge-line ; pallial impression 1, 2, 3 : Tellinomya nasjita. 4,5: T. dubia. 0, 7 : T. cuneata' In the larger species known, the hinge-line is only slightly arcuate; while among the other species we find many variations in the curvature, and it sometimes becomes dist
. Annual report of the Regents of the University on the condition of the State Cabinet of Natural History, with catalogues of the same. State Cabinet of Natural History (N. Y. ); Science; Museums. No. 109. 183 posterior, one large and strongly impressed, the otlicr smaller, lying above and between tlie larger one and Hie liinge-line ; pallial impression 1, 2, 3 : Tellinomya nasjita. 4,5: T. dubia. 0, 7 : T. cuneata' In the larger species known, the hinge-line is only slightly arcuate; while among the other species we find many variations in the curvature, and it sometimes becomes distinctly angular, as in T. cimeala. In some species the teeth on either side of the beak curve outwards from it, and in others inwards towards the beak on both sides. The teeth are often very minute immediately beneath the beaks. The shells of this genus vary from elliptical to ovate and subtriangular forms, many of them being contracted on the posterior side ; they are usually of moderate thickness, though one species is very thick and strong. Some of the species have a distinctly impressed lunule. The lesser muscu- lar impression is often a small pit placed directly beneath the hinge-line, and between it and the large muscular impression. The beaks are usually of medium size, pointed, rarely ventricose, approximate or in contact, never subspiral. * The specimens above figured were collected at Pauquette's Rapids on the Ottawa River, in beds lying at the junction of the Trenton and Black-river limestones. 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 State Cabinet of Natural History (N. Y. ); University of the State of New York. Board of Regents. Albany, N. Y. : University of the State of New York
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectm, booksubjectscience
