. Annual report of the regents of the university of the state of New York on the condition of the State Cabinet of Natural History and the historical and antiquarian collection annexed thereto. Fig. 4 & 5. Crania hamiltonensis; the interiors of ventral valves, showing some dif-ference of form, and fig. 5 showing more distinctly the vascular 6. Crania crenistria; the exterior of the dorsal 7. Crania leoni; the interior of the ventral valve in its natural 8. Crania leoni; the interior of the ventral valve of a distorted specimen. No. 89.] 77 LINGULA E
. Annual report of the regents of the university of the state of New York on the condition of the State Cabinet of Natural History and the historical and antiquarian collection annexed thereto. Fig. 4 & 5. Crania hamiltonensis; the interiors of ventral valves, showing some dif-ference of form, and fig. 5 showing more distinctly the vascular 6. Crania crenistria; the exterior of the dorsal 7. Crania leoni; the interior of the ventral valve in its natural 8. Crania leoni; the interior of the ventral valve of a distorted specimen. No. 89.] 77 LINGULA EXILIS (). Shell broad ovate, moderately convex, length little greater than width; apexobtuse; cardinal margin obtusely rounded; sides regularly curving; base broad-ly rounded. Surface lamellose with irregular rugae or lines of species is very broad; and the great width at the apex, and broadly rounded cardinal extremity, distinguish it among all the other forms of the Hamilton group or of the rocks of New-York. Geological formation and locality. In the Marcellus shale, near Bridgewater, New-York. DISCINA ALLEGHANIA (). Shell broadly elliptical or nearly circular.
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectscience, bookyear1853
