. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. 19 20 Fig. 19. Heberlella bellariigosa (Conrad). A brachial valve. X 2. Fig. 20. The same species. An imperfect brachial valve, to show the strong concentric lamellae. X 2. Locality.—A rather common shell in two localities on Valcour Island, New York. 28. Orthis acuminata Billings. Orthis acuminata Billings, 1859. Canadian Naturalist and Geologist, Vol. IV, p. 44, fig. 19. Orthis acuminata Billings, 1863. Geology of Canada, p. 130, fig. 59. This species, which is characterized by its Spirifer
. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. 19 20 Fig. 19. Heberlella bellariigosa (Conrad). A brachial valve. X 2. Fig. 20. The same species. An imperfect brachial valve, to show the strong concentric lamellae. X 2. Locality.—A rather common shell in two localities on Valcour Island, New York. 28. Orthis acuminata Billings. Orthis acuminata Billings, 1859. Canadian Naturalist and Geologist, Vol. IV, p. 44, fig. 19. Orthis acuminata Billings, 1863. Geology of Canada, p. 130, fig. 59. This species, which is characterized by its Spirifer-Vike outline, was founded by Billings on a single specimen from Caughnawaga, Canada. The type is now before the writer, and it proves to be an imperfect. Fig. 21. The type of Orthis acuminata Billings. Outline drawing to show the portion of the shell now preserved, and its probable shape when complete. One-half larger than natural size. Fig. 22. Interior of a brachial valve of Hebertella vulgaris, to compare with the preceding. brachial valve of some species of Hebertella, perhaps H. vulgaris. The acuminate character of the cardinal extremities is due to a trans- verse fracture of the shell and the flaking off of some of the inner layer. The shell is broken very evenly along the front, but that it is broken. 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 Carnegie Museum; Carnegie Museum of Natural History. [Pittsburgh] : Published by authority of the Board of Trustees of the Carnegie Institute
Size: 1870px × 1336px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
