. Rapport annuel de l'université de l'état de New York sur l'état de l'État Cabinet d'Histoire Naturelle et de l'historique et la collection de livres anciens annexés. ging branches : branches longues, simples ou ra-mose de la même manière que le pied. Substance fibreuse ou strié ; le mainstipe et branches marquée par une ligne longitudinale enfoncée, indicatingthe centrale de l'axe. Cellules ou serratures inconnu. Ces organes sont associés à l'graptolites ; et d'un général similarityin leur substance, je suppose qu'ils appartiennent à la même famille de fossiles. Dans tous le s

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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. ging branches : branches long, simple or ra-mose in the same manner as the stipe. Substance fibrous or striate; the mainstipe and branches marked by a longitudinal central depressed line, indicatingthe axis. Cellules or serratures unknown. These bodies are associated with the Graptolites; and from a general similarityin their substance, I suppose them to belong to the same family of fossils. In allthe specimens the surface visible is smooth or striated without indentations, andmarked by cross fractures or cleavage planes. The fragments of what appear tobe carbonized plants, in the shales of the Hudson-river group, probably all belongto this genus, or to the Dendrograptus. THAMNOGRAPTUS TYPUS(n.s.;.Stipe strong, flattened : branches alternating, about half as wide as the mainstipe and expanding at their junction with it, simple, marked along the centreby a depressed line or axis. Surface marked by fine longitudinal striae, withobliquely transverse fractures or lines of cleavage. Fig.l.. 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. B.Ellis 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

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• bookcentury1800
• bookdecade1850
• booksubjectscience
• bookyear1853