. Annual report of the Regents. New York State Museum; Science. I. NIAGARA FALLS AND VICINITY 137 ance, somewhat resennbling the convolutions of the intestine; those of the last cycles short; all with papillate elevations or carinae on the sides, giving in section a crenulate or echinate appearance. Dis- sepiments present. Epitheca well developed. Enterolasma caliculus (Hall) (Fig. 29) S t r e p t e 1 a s m a caliculus Hall (1852. Pal. N. Y. 2:111, pi. 32) Distinguishing characters. Turbinate, oblique or curved, more or less rapidly expanding form; moderately deep cup; septa 20 to 50, separate
. Annual report of the Regents. New York State Museum; Science. I. NIAGARA FALLS AND VICINITY 137 ance, somewhat resennbling the convolutions of the intestine; those of the last cycles short; all with papillate elevations or carinae on the sides, giving in section a crenulate or echinate appearance. Dis- sepiments present. Epitheca well developed. Enterolasma caliculus (Hall) (Fig. 29) S t r e p t e 1 a s m a caliculus Hall (1852. Pal. N. Y. 2:111, pi. 32) Distinguishing characters. Turbinate, oblique or curved, more or less rapidly expanding form; moderately deep cup; septa 20 to 50, separated by a space of twice their width; well marked costal grooves which lie opposite both m-lMf NgpT long and short septa; relatively thin 1 ,1 ., 1 Fig. 29 Enterolasma caliculus and smooth epitheca. Found rarely in the upper Clinton beds, and abundantly in the lenses of limestone in the Clinton, the lower part of the Rochester shales and the Bryozoan beds of these shales. Also in the same shales at Lockport and farther east. Genus zaphrentis Rafinesque [Ety.: C«, many; (fprjv, diaphragm] (1820. Ann. des sci. phys. Brux. 5:234) Corallum simple, conic or turbinate, or conico-cyhndric, with a deep calyx, and well developed septa, 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 primary septa. Costae and a thin epitheca occur. Zaphrentis turbinata (Hall) (Fig. 30). Polydilasma tur- binatum Hah (1852. Pa/. A^. F. 2:112, pi. 32) Distinguishing characters. Form variable, usually short and tur- binate ; calyx gradually deepening from margin halfway to the center and then abruptly descending, almost vertically to a moderate depth; alternate septa terminating at point of sudden deepening of calyx, others reaching to center; dissepiments sHghtly developed. Found in the Lockport limestone at Niagara(?) and Lockport, where it occurs a few feet above the Please note that thes
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