. The Canadian naturalist and geologist. Natural history -- Periodicals. Fig. 3. FijT. 2. Fig. 2. Oncoceras constrictmn.—Hall. ' Fig. 3. A section across Oncoceras constrictum, at the up^er chamber from a to b' The word Orthoceratite is derived from two Greek words: orthos, straight, and keras, a horn, meaning literally a straight horn. The Orthoceratites are all straight. The word Oncoceras is from the Greek onkos, a bending or protuberance, and keras, a horn. The fossil of which the word is the generic name is not qmte straight but curved, as above represented in Fig. 2. The largest are scar
. The Canadian naturalist and geologist. Natural history -- Periodicals. Fig. 3. FijT. 2. Fig. 2. Oncoceras constrictmn.—Hall. ' Fig. 3. A section across Oncoceras constrictum, at the up^er chamber from a to b' The word Orthoceratite is derived from two Greek words: orthos, straight, and keras, a horn, meaning literally a straight horn. The Orthoceratites are all straight. The word Oncoceras is from the Greek onkos, a bending or protuberance, and keras, a horn. The fossil of which the word is the generic name is not qmte straight but curved, as above represented in Fig. 2. The largest are scarcely four inches in length. They are usually found m the condition of casts or moulds of the interior, the tubular shell having been destroyed. These casts shew all the septa, and the: form of the large chamber in which the body of the animal was contained. This species is slightly curved,^ ventricose in 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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