. 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. LIMINARY NOTICE OF SOME OF THE SPECIES OF CRINOIDEA KNOWN IN THEUPPER HELDERBERG AND Hi^MILTON GROUPS OF NEW-YORK. CRINOIDEA. GENUS EDRIOCRINUS (Hall). In the third volume of the Palaeontology of New-York*, I haveproposed the name Edriocrinus for some species of Crinoidea whichare apparently destitute of a column, but which in their young stateare affixed by their basal plates, and afterwards become fre
. 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. LIMINARY NOTICE OF SOME OF THE SPECIES OF CRINOIDEA KNOWN IN THEUPPER HELDERBERG AND Hi^MILTON GROUPS OF NEW-YORK. CRINOIDEA. GENUS EDRIOCRINUS (Hall). In the third volume of the Palaeontology of New-York*, I haveproposed the name Edriocrinus for some species of Crinoidea whichare apparently destitute of a column, but which in their young stateare affixed by their basal plates, and afterwards become free. Oneof the described species^ inits earlier stages of growth, often occursin groups of two or three individuals, firmly adhering to some foreignbody by a broad base of attachment. The species described are from the Lower Helderberg limestonesand from the Oriskany sandstone. In the limestone of the Upper Helderberg group there is a similarform, with more elongated base, which is sometimes rounded, andresembles a short column; but so far as I am able to determine fromthe specimens examined, the species is sessile, having the structureof those already described, without a jointed
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectscience, bookyear1853
