. Annual report. New York State Museum; Science; Science. GRAPTOLITES OF NEW YORK, PART 2 231. In America the genus has been first noted by Hall, who repeatedly has figured typical Corynoides as " germs " ; thus in 'Palaeontology of New York, volume 3, page 508, figure 7, where the form, here described as C . calicularis, is readily recognized in the woodcut. It is explained as " apparently the young of one of the singly serrated ; Another very correctly drawn example [1865, pi. B, fig. 19, see text fig. 125] which dis- tinctly shows the basal part as described in thi


. Annual report. New York State Museum; Science; Science. GRAPTOLITES OF NEW YORK, PART 2 231. In America the genus has been first noted by Hall, who repeatedly has figured typical Corynoides as " germs " ; thus in 'Palaeontology of New York, volume 3, page 508, figure 7, where the form, here described as C . calicularis, is readily recognized in the woodcut. It is explained as " apparently the young of one of the singly serrated ; Another very correctly drawn example [1865, pi. B, fig. 19, see text fig. 125] which dis- tinctly shows the basal part as described in this paper, is designated as " a germ where the solid axis is on one side ; the species probably belongs to the monoprionidian ; C. calicularis has been recognized in the Normans- kill shale of Canada and New York by Nicholson, Lap- worth and Gurley. The occurrence of a species in the Utica *??? "4 .°:,des ?> 1 calicularis .Nicholson. 11 1 . 11,1 a • i r ~l Copies of Gurley's manu- snale was later announced by the present writer [1900]. script figures Comparing the figures of Corynoides hitherto published with my material, which comprises at least three different species, and an abundance of excellently preserved specimens, I find that Whitfield's early figure of the germ from the Normanskill shale had for its basis evidently a more complete specimen than the English authors had access to, for it shows not only a nema but also the small transverse basal part, which I consider as the sicula. It has been necessary to reproduce a considerable number of specimens in enlarged drawings to bring out the details of their structure and to illustrate their various aspects [see text fig. 126 et seq. and pi. 13]. The structure of the rhabdosome of Corynoides which my material leads me to infer is that of a sicula bearing three thecae in the mature rhabdosome. The sicula does not seem to differ in form or character from that of other graptolite genera. It is a r


Size: 1558px × 1604px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1902