. 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. rofile view shows a rotundity of the volutions, anda depression towards the centre, not seen in the American specimens. On comparing the dorsal view given by De Koninck, with our specimens, wefind the dorsal lobe in the latter proportionally longer and more constricted above;while its retral extremity is suddenly constricted, and then continued in a narrowacute point. In consideration of these differenc
. 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. rofile view shows a rotundity of the volutions, anda depression towards the centre, not seen in the American specimens. On comparing the dorsal view given by De Koninck, with our specimens, wefind the dorsal lobe in the latter proportionally longer and more constricted above;while its retral extremity is suddenly constricted, and then continued in a narrowacute point. In consideration of these differences in the European and American forms, Ithink it proper to propose a distinct name for the Rockford species. • GONIATITES IXION. Goniatites rotatorius of authors; G. rotatorius? page lOl of this depressed orbicular : volutions entirely embracing; the greatest width ofthe volutions near the ventral side, gradually curving or flattened on the sides,the back rounded; width on the back, from the points of the dorso-lateral lobes,a little more than half the greatest width of the vMution. Septa as in figure 15,page 101. The dorsal side shown in the accompanying diagram. 1 2 3 A.
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectscience, bookyear1853
