. 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. The accompanying figure is from afragment of this species, of the naturalsize. Geological position and locality. Inthe shales of the Hudson-river group :Near Albany. Thamnogeaptus typus. This genus was proposed by me in 1858, in a paper read before the AmericanAssociation for the Advancement of Science; but no publication has been made ofthe name, so far as I know, except in a newspaper report at the ti
. 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. The accompanying figure is from afragment of this species, of the naturalsize. Geological position and locality. Inthe shales of the Hudson-river group :Near Albany. Thamnogeaptus typus. This genus was proposed by me in 1858, in a paper read before the AmericanAssociation for the Advancement of Science; but no publication has been made ofthe name, so far as I know, except in a newspaper report at the time. At that timeI had seen but a few fragments of the species, the first one having been discoveredby Mr. J. of Albany; and it is only since the descriptions were in typethat the specimen, from which the accompanying figure 2 has been made, wasdiscovered by Mr. Whitfield among the shales at Normanskill. The constancy ofthe generic characters in two distinct species, and in at least half a dozen speci-mens, affords satisfactory evidence for separating this from any described forms. No. 89.] 63 Fig. THAMNOaRAPTUS TYPUS. THAMNOGRAPTUS CAPILLARIS ( n. s.). Stipe extremely slender, flexuose or slightly divergent at the junction of thebranches : branches diverging nearly at right angles to the stipe, capillary;branchlets less divergent. Surface of stipe and branches marked by numerousindentations, which may indicate the place of cellules.* Substance of the stipe,branches and branchlets, nearly cylindrical. This species is an extremely slender form; the stipe, aspreserved, being capillary, and the branches and branch-lets still finer. It is not improbable that what appears inthe fragment as the main stipe is a branch of a larger one,but its form and mode of branching preclude its identitywith the preceding species. The figure is from a fragment of this species, twiceenlarged. Geological position and locality. In the shales of theHudson-river group : Near Albany. ThAMNOGBAP
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectscience, bookyear1853
