. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. 281 Foniid in the soft Calcareous sliales, on the Shore of Lake Erie, at Eighteen Mile Creek.'' ( Hall.) Bellerophon LEDA. Hall. (Fig-. 212.) (Pal. N. Y., Vol. v., Pt. n.,p. 110, PI. XXHI.) Bistin^-uishino- Chnrncters.— Sub-globose outline, slightly flattened on back; ra|)idly ex})anding body-^vhorl; wide aperture; abruptly spreading peristome, broadly sinuate and notched in front; reflexed inner lip, extending in a callus over the pre- ceding whorl; strong revolving strijp, alternating in size; finer, sub-equal,
. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. 281 Foniid in the soft Calcareous sliales, on the Shore of Lake Erie, at Eighteen Mile Creek.'' ( Hall.) Bellerophon LEDA. Hall. (Fig-. 212.) (Pal. N. Y., Vol. v., Pt. n.,p. 110, PI. XXHI.) Bistin^-uishino- Chnrncters.— Sub-globose outline, slightly flattened on back; ra|)idly ex})anding body-^vhorl; wide aperture; abruptly spreading peristome, broadly sinuate and notched in front; reflexed inner lip, extending in a callus over the pre- ceding whorl; strong revolving strijp, alternating in size; finer, sub-equal, thread-like, cancellating, concentric stritP; narrow, flattened, or slightly concave revolving band, usually marked by several fine revolving strijv. Found in the shales below the Trilobite beds, and in the Pleurodictyum beds (rare); Strophalosia bed, in Avery's Creek, and on the Lake Shore (connnon, though usually com- pressed) ; also in the Transition shales, twenty feet below the Strophalosia bed, in Erie Cliff (rare).. BeUerophon led a Class Pteropoda. Cuvieu. The pteropods, or sea butterflies, are pelagic animals, often found in vast numbers swim- ming near the surface of the water after dark. Though frequently naked, a large number bear more or less transparent shells, which are very variable in outline. The shells are often found in vast quantities on the ocean floor, constituting " pteropod ; The head of the pteropod is indistinctly defined, the eyes are rudimentary, and the foot is represented by two lateral fin-like or wing-like appendages, near the head; the body is straight or variously inrolled. Fig. 218 shows a modern pteropod with 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 Buffalo Society of Natural Sciences. Buffalo, N. Y. : Buffalo Society of Natural Sciences
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