. The Canadian naturalist and geologist. Natural history -- Periodicals. 452 Fossils of the Chazy Limestone. De Orbigny, and others, lc will be seen that some, such as Schizos- toma delphinuloides, , S. taeniatwn, S. vittatum, S. costatum, Euomphalus, Dionysii, E. catillus, and other allied forms, have a spiral band, with backward curving lines of growth, differing only from PUurotomaria in their more slender cylindri- cal whorls and wide umbilicus. Many of these, although perhaps generically distinct, should, I think, at least be placed in the same family with Pleurotomaria. Pleuro
. The Canadian naturalist and geologist. Natural history -- Periodicals. 452 Fossils of the Chazy Limestone. De Orbigny, and others, lc will be seen that some, such as Schizos- toma delphinuloides, , S. taeniatwn, S. vittatum, S. costatum, Euomphalus, Dionysii, E. catillus, and other allied forms, have a spiral band, with backward curving lines of growth, differing only from PUurotomaria in their more slender cylindri- cal whorls and wide umbilicus. Many of these, although perhaps generically distinct, should, I think, at least be placed in the same family with Pleurotomaria. Pleurotomaria docens, N. 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
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