. 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. 1 & 2 <are of the exterior, and 3, 4 the interior and cast of Athyris spirifzroides of theHamilton group, Fig. 5, 0 & 7 ; Dorsal, front and profile Aiews of MeristeUa princeps of the Lower Helder-berg. 8, 9 are the interior and cast of the ventral valve as shown in M. nasuta(Atrypa nasuta, Conrad) of the Upper Helderbcrg limestones of New-York andOhio. The letter x refers to the filling

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. 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. 1 & 2 <are of the exterior, and 3, 4 the interior and cast of Athyris spirifzroides of theHamilton group, Fig. 5, 0 & 7 ; Dorsal, front and profile Aiews of MeristeUa princeps of the Lower Helder-berg. 8, 9 are the interior and cast of the ventral valve as shown in M. nasuta(Atrypa nasuta, Conrad) of the Upper Helderbcrg limestones of New-York andOhio. The letter x refers to the filling of the rostral cavity; t, the cavities of thedental lamellae; r, the triangular muscular Xt___^-

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Keywords: ., bookcentury1800, bookdecade1850, booksubjectscience, bookyear1853