. 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. Science. 14 Assembly " This genus abounds in the Silurian rocks, but I have not seen a species '* from any more recent ;* Mr. CoNBAD describes sixteen species under this genus, among which "were included the C. bisulcata since described by De Verneuil as the tj^pe of the Genus Grammtsia, under the name of G. hamiltonensis. The description corresponds in many respects with that o
. 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. Science. 14 Assembly " This genus abounds in the Silurian rocks, but I have not seen a species '* from any more recent ;* Mr. CoNBAD describes sixteen species under this genus, among which "were included the C. bisulcata since described by De Verneuil as the tj^pe of the Genus Grammtsia, under the name of G. hamiltonensis. The description corresponds in many respects with that of Paljearca, and the illustration given by Mr. Conrad likewise resembles that genus. Should an examination of the typical species prove the two identical, the later name will give place to that of Cypricakdites ( Conrad ) .f * "When these remarks were written, the Hamilton and Chemung groups were regarded by the New-York Geologists as Silurian, and as being the equivalent of the Ludlow rocks of England. t This figure is copied from the original figure of Mr. Conrad, accompanying his description of the genus in 1841. The plate upon which this occurs was engraved to accompany the Annual Report of 1841 ; but, unfortunately, only a fimall number were ever distributed, so far as known to the writer. The same plate contains illustrations of the Genera Nuculites, Lyrodesma, Orthonota, Cyrtoxites, Orthostoma, Dictyocrinus, Aspidolites and Dicranurus, as well as of one species of Platyceras ; all genera proposed by Mr. Conrad. At the time I proposed the Genus Paljearca in 1847, I had overlooked the description and figure of Cypricardites ; and it is only since the printing of that part of Vol. iii, Palseontology of New-York, that my attention has been directed to the subject of the preceding Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrati
Size: 1767px × 1415px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1850, booksubjectscience, bookyear1853
