. Bulletin of the Buffalo Society of Natural Sciences. Natural history -- New York (State); Natural history. 123 Genus ZAPHRENTIS. Rafinesque. [Ety. : Za, very; phrentia, diaphragm.] (An. Des. Sci. Pliys. Brux., Vol. V., p. 234.) Corallum simple, conical or turbinate, or conico-cylin- drical, with a deep calyx, and well-developed septa, the primary ones reaching to the center. Dissepiments and tabula? occur, the latter usually well developed. A deep fossula marks the abortion of one of the four primary septa. Costa? and a thin epitheca occur. Note.—It is probable that several species of Zaphre
. Bulletin of the Buffalo Society of Natural Sciences. Natural history -- New York (State); Natural history. 123 Genus ZAPHRENTIS. Rafinesque. [Ety. : Za, very; phrentia, diaphragm.] (An. Des. Sci. Pliys. Brux., Vol. V., p. 234.) Corallum simple, conical or turbinate, or conico-cylin- drical, with a deep calyx, and well-developed septa, the primary ones reaching to the center. Dissepiments and tabula? occur, the latter usually well developed. A deep fossula marks the abortion of one of the four primary septa. Costa? and a thin epitheca occur. Note.—It is probable that several species of Zaphrentis occur in the Hamilton of this region; only one is here given. however, as definitely identified. Zaphrentis simplex. Hall. ( Fig. 4.) (111. Dev. Foss., PL XXI.) Distinguishing Characters. — Smooth and gently curving, regularly tapering outline, often abruptly deflected at the base; septa scarcely reaching the center; tabula? strong, curving down near the margin ; dissepiments few. Found in the coral layer of the lower Mos- cow shales, at Section 5; also in the Encri- ^^'^ Hal»- nal limestone (?) on the Lake Shore, where it is rare. Genus AMPLEXUS. Sowerby. [Ety.: Amplexus, encircling.] (Mineral Conchology, Vol. I., p. 165.) Corallum simple, conical, or cylindrical, with a well- developed epitheca, and a circular, moderately deep calyx. Septa strong, short, never reaching the center, which is occupied by horizontal tabula?, frequently bent down at the periphery. A well-developed fossula is present. This genus differs from Zaphrentis mainly in the smooth central area of the calyx, which is formed by the tabula? in the absence of the 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. : The Society
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