370 Barreti—Coralline Limestone from Montague, New Jersey. 
Biopalla Heckeli.—Size medium to ——. Form sometimes 
flattened. Markings often distinct. Surface with more or less 
open gash-shaped cup-like cells, differing in size with the body, 
one-third to one inch in longest diameter, in directions conform- 
able to those of the furrows. 
flattened, lateral edges thin and centers more or less projecting. 
Markings generally not deep; often pit-like marks; sometimes 
an indrawn furrow runs diagonally from bottom to to 
around, with centers along it. Often beautifully translucent, 
with peculiar markings. : 
From Drift, Keokuk, Iowa, ete. 
Biopalla palmata.—Size medium to ——. : Form flattened. 
Markings not deep on top and bottom, but elongated toward 
the edges; the edge deeply serrated by projecting interspaces, 
and deeply indrawn vertical furrows. 
rare and peculiar form. Keokuk, Iowa, Drift. 
Art. LIV.—The Coraline, or Niagara Limestone of the Appala- 
chian System as represented at Nearpass’s Chiff, Montague, New 
Jersey ; by Dr. S. T. Barrert, Port Jervis, N. Y. : 
Oe ae 
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