. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. 128 Genus ZAPHRENTIS. Rafinesque. [Ety. : Za, very; p/nrntis, iliaphragm.] (An. Des. 8ci. Phys. Briix., Vol. V., p. 234.) rorallum simple, conical oi- turl)inate, or conico-cvliu- clrical, with a deep calyx, and well-developed sejita, the primary ones reaching to the center. Dissepiments and tabulae occur, the latter usually well developed. A deep fossula marks the abortion of one of the four ])rimnry septa. Costa? and a thin epitheca occur. Note.â It is probable that several species of Zaphrentis occur in the Ham
. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. 128 Genus ZAPHRENTIS. Rafinesque. [Ety. : Za, very; p/nrntis, iliaphragm.] (An. Des. 8ci. Phys. Briix., Vol. V., p. 234.) rorallum simple, conical oi- turl)inate, or conico-cvliu- clrical, with a deep calyx, and well-developed sejita, the primary ones reaching to the center. Dissepiments and tabulae occur, the latter usually well developed. A deep fossula marks the abortion of one of the four ])rimnry septa. Costa? and a thin epitheca occur. Note.â It is probable that several species of Zaphrentis occur in the Hamilton of this region : only one is here given, however, as definitely identified. Z.\PHREXTIS SIMPLEX. Hall. (Fig- â¢!â¢) (111. Dev. Foss., PL XXI.) Distinguishing Cliaracters. â Smooth and gently curving, regularly tapering outline, often abruptly defiected at the base; septa scarcely reaching the center: taljulae strong, curving down near the margin ; disse|)iments few. Found in the coral layer of the lower Mos- j^. ^ zaj,hrentis cow shales, at Section â¢"); also in the Encri- 'â ""^'''â â¢' 'â¢^^"^ ^ ^â ual limestone (?) on the Lake Shore, where it is Gexis am plexus. Sowekhy. [Ety.: encircling.] (Minenil 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^, frecpiently l)ent 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 tabube 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. : B
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