. 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. Geological position and locality. In the shales of the Hudson river group: NearAlbany. GRAPTOLITUS SPINULOSUS (). Stipe simple, flat; sides subparallel, gradually expanding from the base, which isfurnished with several minute setiform radicles: serratures not distinct, the mar-gin sinuous, the prominent parts extended into slender ascending spinuliformprocesses. These spinules are about one-sixteent
. 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. Geological position and locality. In the shales of the Hudson river group: NearAlbany. GRAPTOLITUS SPINULOSUS (). Stipe simple, flat; sides subparallel, gradually expanding from the base, which isfurnished with several minute setiform radicles: serratures not distinct, the mar-gin sinuous, the prominent parts extended into slender ascending spinuliformprocesses. These spinules are about one-sixteenth of an inch distant from eachother. No. 89.] 61 This species presents no distinct serratures on the margin, which is simplyundulating with the extension of the processes described, which probably mark theplace of the serrature. It has been seen only in small individuals or fragments;but its great comparative width, the rigid distant ^ spinules and absence of defined serratures are ^ distinguishing characters. The accompanying figure is of a fragment of > | this species, twice the natural size. ^1 Geological position and locality. In the shalesof the Hudson river group: Near The Genus Gladiolites or Rettolites of Barrande was proposed for certaingraptolitic forms having the general features of the biserrate Graptolites, , G. mucronatas, and others; but the structure of the entire substanceof the stipe differs in being apparently minutely celluliferous or reticulate. GENUS GLADIOLITES = RETIOLITES (Bahrande). PoLYPiER small, flat, triangular, elongate, formed of two series of symmetricalcellules arranged along the axis. These cellules extend from a single internalcanal, which occupies the central part of the polypier: their orifices are disposedupon the sides of the triangle; they make an angle with the axis, and leave nospaces between them. ** The only known species has its surface covered with a film, which appears toenvelope it. I have recognized in the
Size: 1038px × 2408px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1850, booksubjectscience, bookyear1853
