. The Canadian naturalist and geologist. Natural history -- Periodicals. Fossils of the Calciferous Sandrock, 357 these large carinas with numerous coarse longitudinal striae follow- ing the whorls to the apex. The lower and outer side of the whorls are regularly convex, and the umbilicus one third of the width of the whole shell. This species is about the size of H. uniangulata and also of H. planulata, the spire a little more elevated than that of the latter, while the upper surface, in addition to the two keels, is orna- mented with the longitudinal spiral striae, which occur only on the ou
. The Canadian naturalist and geologist. Natural history -- Periodicals. Fossils of the Calciferous Sandrock, 357 these large carinas with numerous coarse longitudinal striae follow- ing the whorls to the apex. The lower and outer side of the whorls are regularly convex, and the umbilicus one third of the width of the whole shell. This species is about the size of H. uniangulata and also of H. planulata, the spire a little more elevated than that of the latter, while the upper surface, in addition to the two keels, is orna- mented with the longitudinal spiral striae, which occur only on the outer side of H. planulata, and not at all onlZ". uniangulata. Locality and formation.—Mingan Islands, White limestone. Collectors.—Sir W. E. Logan, J. Richardson. Maclurea matutina. ? (Hall). Maclurea matutina, (Hall). Paleont., , vol. 1, p. 10, pi. 3, fig. Fig. 7. a Maclurea matutina. Lower side. b Front view. The specimen above represented agrees in its proportions very closely with those figured by Professor Hall. On referring to the plate cited, it will be seen that the figure shews two im- perfect specimens, a small one with two whorls, and a larger one with nearly three. Ours agrees almost exactly with the smaller and also with the first two whorls of the larger. I think it highly probable that when good specimens can be compared, those of New York will be found identical, and I shall not therefore pro_ pose another name for ours. Locality and formation.—Mingan Islands, Calciferous sand- rock. Collectors.—Sir W. E. Logan, J. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Natural History Society of Montreal. Montreal, Dawson
Size: 1246px × 2004px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthornaturalh, bookcentury1800, bookdecade1850, bookyear1859
