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PALEOZOIC PALEONTOLOGY. 
DESCRIPTIONS OF SPECIES IN THE COEYMANS LIMESTONE FAUNA. 
COELENTERATA. 
ANTHOZOA. / 
ZAPHRENTIS ROEMERI HE. & H.? 
Plate XXVI., Fig. 1. 
Specimens of horn corals, which may be provisionally referred to 
the genus Zaphrentis, are occasionally met with in the Coeymans 
limestone. They are all poorly preserved, and are not in a condition 
of preservation for accurate identification, but some specimens seem 
to resemble Z. roemert. 
FAVOSITES HELDERBERGIAE Hall. 
188%. Favosites helderbergie Hall, Pal. N. Y., vol. VL. p. 8, pl. 4, 
figs. 1-2, pl. 5, figs. 1-3, pl. 6, figs. 1-8. 
Description.—Corallum consisting of large, lenticular, depressed- 
convex or hemispherical masses; base covered by a strongly-wrinkled 
epitheca. Corallites polygonal, their inner surface showing evidence 
of a few strong, longitudinal striew. T'abule frequent, from ten to 
fifteen in the space of 10 mm.; thickness equal to that of the walls. 
Mural pores in one or two ranges, comparatively large, circular, with 
margins distinctly elevated. Walls of corallites thin, but frequently 
much thickened near the surface by silicification, and sometimes granu- 
lose or spinulose on the inner face. On some specimens the corallites, 
at the surface, are nearly equal, having a diameter of about 1.5 mm. ; 
on other specimens the diameter varies from .66 mm. to 1.5 mm. On 
many specimens some of the corallites are larger and less angular than 
those surrounding them, being a little more than 2 mm. in diameter. 
Remarks.—This species occurs abundantly at the base of the Coey- 
mans limestone, where, associated with masses of Stromatopora, it 
