. 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. rm of this species: thisfigure is of the natural size. The accompanying fig. 6 (on the opposite page), of a very beautiful specimen ofthe G. gracilis y is from the same locality as all the others known to me, but showsa greater development of the branches and a more distinct serration than anyothers in the collection!. * The specimen figured in Emmonss American Geology, Plate 1, fig. 6, and described as
. 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. rm of this species: thisfigure is of the natural size. The accompanying fig. 6 (on the opposite page), of a very beautiful specimen ofthe G. gracilis y is from the same locality as all the others known to me, but showsa greater development of the branches and a more distinct serration than anyothers in the collection!. * The specimen figured in Emmonss American Geology, Plate 1, fig. 6, and described as thetype of a new Genus NemagrapttJs, is evidently a fragment of G. gracilis. \ Although the main stipe was represented as continuous, it is nevertheless partially cov-ered in the centre, or at the radicle-point by the overlapping of one of the bent branches anda little adhering stone. No. 89.] 57 This one and the preceding species are remarkably slender, and although serra-ted on one side only, present some marked peculiarities when compared with thesingly serrated forms with central discs and a bilateral arrangement of the branches,as in G. logani, , and G. multifasciatus. I. Fig. 6.—Geaptolitus gracilis. The specimens of this species, which have thus far come under observation, havestill some points relative to the mode of growth undecided. It may have grown,in the young state, as shown in figures 1, 2, 3. If, however, the little transversebar at the base indicates the original existence of two similar stipes or mainbranches in addition to those already known, the mode of growth may still havebeen similar, but having four instead of two main branches or stipes. If spreadout, as the specimens usually are upon the surface, it may assume the form of theaccompanying diagram, fig. 7.
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectscience, bookyear1853
