. Bulletin - New York State Museum. Science. 138 NEW YORK STATE MUSEUM. 'A ^>\ Fig. 31 Cyathophyllum Fig. 30 Zaphrentis turbinata hydraulicum Genus cyathophyllum Goldfuss [Ety.: xuado?, 2L cup; <puUop, a leaf (septum) ] (1826. Petrefacta Germaniae, p. 54) Corallum normally simple, the individuals conic, or conico-cylin- dric. Septa well developed, radially arranged, the larger extending to the center, where they are twisted into a pseudocolumella. Cos- tae usually obsolete. Tabulae present but only in the center of the visceral chamber, the outer area being filled with vesicular dissepi-
. Bulletin - New York State Museum. Science. 138 NEW YORK STATE MUSEUM. 'A ^>\ Fig. 31 Cyathophyllum Fig. 30 Zaphrentis turbinata hydraulicum Genus cyathophyllum Goldfuss [Ety.: xuado?, 2L cup; <puUop, a leaf (septum) ] (1826. Petrefacta Germaniae, p. 54) Corallum normally simple, the individuals conic, or conico-cylin- dric. Septa well developed, radially arranged, the larger extending to the center, where they are twisted into a pseudocolumella. Cos- tae usually obsolete. Tabulae present but only in the center of the visceral chamber, the outer area being filled with vesicular dissepi- ments. Exterior covered with an epitheca. Cyathophyllum hydraulicum Simpson. (Fig. 31) Grabau. Geol. soc. Am. Bui. 11:364, pi. 21, fig. la-d. Distinguishing . characters. Simple, conico-cylindric, slender, sometimes curved; growth irregular with abrupt changes in direc- tion; strongly costate adult portion; non-costate young; well de- veloped epitheca, which often shows coarse wrinkles; calyx some- what less deep than its diameter; numerous strong thin and rather widely separated septa, meeting in center where they are slightly twisted, and not infrequently uniting before they reach the center; well developed dissepimental structures. Found abundantly in the upper Manlius limestone of the Niagara region, but only as external molds in the limestone. Gutta percha casts however show the characters 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 New York State Museum; New York State Museum. Albany : New York State Education Dept
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