279 
oblique, oval, surrounded by mesopores; the lunarium is developed into a 
prominent hood-structure. 
Ceramoporella grandis n. sp. Plate I, Figs. 46. The colony grows into 
very irregular small masses, epithecated below and composed of superim- 
posed contorted layers. Zooecial apertures are but slightly oblique, gen- 
erally appearing somewhat rhomboidal at the surface. The lunarium is 
thick but not very prominent in the specimen described. It occupies one- 
third of the circumference of the aperture. Maculae are scarcely distin- 
guishable. The interior walls are rather thick, including numerous rounded 
mesopores; the number of these varying, however, in different parts. The 
zooecia are suboyate with irregularly laminated walls; diaphragms are 
wanting. 
This species is distinguished from C. robusta by its inconspicuous maculae, 
somewhat smaller and exteriorly less rounded cells and more numerous 
mesopores. The latter are rarely seen at the surface, being apparently in- 
cluded within the subquadrate zooecial wall, for which reason the species is 
probably related to C. inclusa and (. ingenua, but separated from those 
species by its laminae growth, thicker layers, heavier walls and less oblique 
apertures. The orifices of C. grandis are not bidenticulate as in ©. inclusa 
and C. ingenua. 
Occurrence: Pierce limestone, Murfreesboro, Tennessee. 
Holotype: 54581 U. 8. Nat. Mus. 
Ceramoporella ingenua n. sp. Plate I, Figs. 1-3. The zoarium forms thin 
laminae, contorted, covered below by a concentrically striated epitheca; as 
far as observed it does not grow in superposed layers. The cell is of the (. 
inclusa type, the elliptical zooecial aperture itself together with generally 
three mesopores being included within a raised rim somewhat rhomboidal 
in outline. Maculae are quite inconspicuous. 
C. ingenua is distinguished from ©. inclusa by free habit of growth and 
larger zooecial spaces, these being as 3:4 or 4:5. The walls of C. ingenua 
are somewhat thicker than (. inclusa. 
In C. grandis the cell mouths do not show the mesopores and the ovate 
zooecial aperture as in C. ingenua. : 
Occurrence: Pierce limestone, Stones River group, Murfreesboro, Ten- 
nessee. 
Holotype: 54579 U. S. Nat. Mus. : 
Genus Cocloclema Ulrich. Genotype: Diamesopora vaupeli Ulrich. 
Coeloclema Ulrich, Jour. Cincinnati Soc. Nat. Hist., 5, 1882, p. 137: 7, 
1884, p. 49 (not defined). Nickles and Bassler, Bull. U. S. Geol. Sury., 173. 
1900, pp. 24, 211. Bassler, Bull. U. S. Geol. Sury., 292, 1906, p. 21. Grabau 
and Shimer, N. A. Index Fossils, 1, 1907, p. 122. Cunnings, 32d Ann. Rept., 
Dept. Geol. Nat. Res. Indiana, 1908, p. 742. Bassler, Bull. U. S. Nat. Mus.. 
77, 1911, p. 83; Zittel-Eastman Textb. Pal., 1913, p. 328. 
Diamesopora (part) Ulrich, Geol. Sury. Illinois, 8, 1890, pp. 380, 467; Geol. 
Minnesota, 5, 1895, p. 330; Zittel’s Textb. Pal. (Engl. ed.), 1896, p. 268. 
Zoarium forms hollow branches lined with a striated epitheca; zooecia 
