. Annual report of the Regents. New York State Museum; Science. NEW GENERA OF PALEOZOIC RUGOSE CORALS 203 Hapsiphyllum, ^e/i. nov. Type: Zaphrentis calcariformis Hall. Fossil corals, Niagara and Upper Held, groups. 1882. p. 33, and 12tli rep't of the state geologist of Indiana, pi. 21, fig. 10, 11. St Louis group, Wash- ington CO. Indiana. Corallum small, simple, conical or horn-shaped; calyx circular, comparatively deep, with thin margins; biareal. The outer area is bounded by the external epitheca; the inner area by a sub- vertical wall of horseshoe shape, open on the side of the septal fove
. Annual report of the Regents. New York State Museum; Science. NEW GENERA OF PALEOZOIC RUGOSE CORALS 203 Hapsiphyllum, ^e/i. nov. Type: Zaphrentis calcariformis Hall. Fossil corals, Niagara and Upper Held, groups. 1882. p. 33, and 12tli rep't of the state geologist of Indiana, pi. 21, fig. 10, 11. St Louis group, Wash- ington CO. Indiana. Corallum small, simple, conical or horn-shaped; calyx circular, comparatively deep, with thin margins; biareal. The outer area is bounded by the external epitheca; the inner area by a sub- vertical wall of horseshoe shape, open on the side of the septal fovea. Two of the larger septa connect with this wall in such a manner as to be apparently a continuation of it, and form a very distinct pyriform septal fovea; septa alternating in size, 10. Fig. lOHapsiphyllum calcariforme (Hall). A transverse section showing the coalescing septa, and the wall of the inner area, connecting with two of the septa. the smaller ones continuing for a short distance into the cavity of the corallum, there coalescing with the larger ones, which continue to the inner wall, with which they coalesce, and in which they terminate. Tabulae and dissepiments are present. The wall of the inner area, connecting with two of the septa and bounding a portion of the septal fovea, is similar to that of A g o n o p h y 11 u m , but that genus differs from this in several respects, principally in having carinations on the sides of the septa. Enterolasma, gen, nov. Type: Streptelasma strictum Haill, 26th rep^t N. Y. state mu- seum nat. hist. 1874. Pal. N. Y. v. 6, pi. 1, fig. 1-10. Helder- bergian, Olarksville, Albany co. N. Y. Examples: Streptelasma caliculum Hall. Pal. N. Y. 1852. v. 2, p. 3, pi. 32, fig. 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; University of the
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