280 
are short, tubular and thick-walled; apertures are oval, oblique, with a 
hood-like lunarium. 
Coeloclema pierceanum n. sp. Plate II, Figs. 1-2. The zoarium consists 
of hollow, cylindrical branches, lined with a wrinkled epitheca, and averag- 
ing 1 to 1.5 mm. in diameter. The inner cavity is usually filled with clay 
and fragments of foreign organic remains. 
The lunaria are well developed, thick, distinct, and form four-fifths to 
nine-tenths of a complete circle about .1 mm. in diameter. The apices of the 
lunarium cause a decided constriction in the aperture and in a few cases 
nearly separate it, making the resemblance of the zooecial openings to the 
figure eight quite striking. 
The zooecia are irregularly distributed over the surface, in some parts 
separated by mesapores, and in others, in contact on one or two sides; four 
to six zooecia occur in 2 mm. The zooecial tubes are short; the earlier por- 
tion is recumbent on the thecal membrane for a short distance and then 
turning outward, approach the surface perpendicularly. 
Mesopores are irregular in shape and size and thick-walled as shown in 
tangential sections. 
No diaphragms were observed in either the zooecia or mesopores. 
Occurrence: Pierce limestone Walter Hill, Rutherford County, Tennessee. 
Holotype: 238-14. Indiana University. 
Coeloclema inflatum n. sp. Plate II, Figs. 3-5. The zoarium consists of 
hollow, cylindrical, branching stems, 1.5 to 2.5 mm. in diameter. The inner 
surface is lined with wrinkled epitheca and the cavity usually filled with 
fragments of foreign material. The zooecial layer is from .5 to .8 mm. in 
thickness. 
Mesopores are few, small and unequally distributed among the zooecia, 
being more numerous in the inconspicuous maculae where they frequently 
separate the zooecial walls. 
The apertures are oval and irregularly distorted forms surrounded by 
thick walls. 
The lunarium is thin, broadly curved, often as wide as the short diam- 
eter of the aperture. The ends of the crescent are inflated, turn outward, 
and lie imbedded in the wall of the zooecia. 
The primitive zooecia have thin walls, and lie along the thecal lining 
for a slight distance (.1 to .8 mm.), then turn outward and approach the 
surface nearly perpendicularly. 
Diaphragms are absent in both zooecia and mesopores. 
Occurrence: Pierce limestone, one and one-fourth miles south of Florence, 
Rutherford County, Tennessee. 
Holotype: 240-20. Indiana University. 
Coeloclema consimile n. sp. Plate II, Figs. 6-7. The zoarium consists of 
eylindrical, ramose, hollow stems from 1.5 to 2.5 mm. in diameter. The 
zooecial layer varies from .5 to 1 mm. in thickness and rises from a wrinkled 
epitheca. 
The zooecial apertures are distorted ovals in cross-sections, with thick 
