280 



are short, tubular and thick-walled ; apertures are oval, oblique, with a 

 hood-like lunarium. 



Goeloclcma pierced iiiiiii ii. sp. Plate II, Figs. 1-2. The zoarium consists 

 of hollow, cylindrical hranclu-s, 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-flfths to 

 nine-tenths of a complete circle about .1 mm. in diameter. The apices of the 

 lunarium cause a decided constriction in the ajierture 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. 



Coeloclerna inflatum )i. 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 la.ver is from .5 to .8 mm. in 

 thickness. 



Mesopores are few, small and une(iu:illy distributed among the zooecia, 

 being more numerous in the inconsi>icuous 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 wiills. ;iii(l lie along tlie thecal lining 

 for a slight distance (.1 to .3 mm.), tlien turn out ward and apitroacb 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. 



Coeloclerna consimile n. sp. Plate II, Figs. 0-7. The zoarium consists of 

 cylindrical, 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 wriidvled 

 epitheca. 



The zooecial apertures are distorte<l ovals in cross-sections, with thick 



