Carboniferous Algal Deposits. 351 



Kansas. It is particularly abundant just north of the 

 little village of Otto, Kansas. It also occurs in the Flo- 

 rena shale at Or and Summit, Kansas. 



The holotypes and paratypes are in the collections of 

 the writer. 



Osagia new genus. 



The Foraker limestone (Pennsylvanian) of south- 

 eastern Cowley County, Kansas and Osage County, 

 Oklahoma, particularly in some of the Ekler Canyon 

 exposures, in some horizons contains an abundance of 



Fig. 5. 



Fig. 5. Osagia incrustata n. sp. X 5. Camera lucida drawing of thin 

 section. The light colored areas within the dark represent nuclei. Circular 

 dark areas are cut perpendicular to the long diameters of the ccenoplases. 

 From type locality, Ekler Canyon, about 7 miles southwest of Cedarvale, 

 Kans. 



algal ccenoplases of small size. The shapes are such that 

 on casual examination they are apt to be mistaken for 

 Fusulina. It is possible that these ccenoplases may rep- 

 resent a new species of Ottonosia; but as none attains a 

 large size and the concentric laminse do not appear to be 

 wrinkled, they are considered the type of a new genus. 

 This view is strengthened by the tendency to develop a 

 fusiform shape. Thin beds of limestone are almost 

 wholly composed of these algal remains. 



"When first discovered it was thought that possibly these 

 structures might have developed through the chemical 

 inorganic precipitation of material around nuclei. This 

 led to a search for oolite and pisolite. None has been 

 found and it is quite certain that they do not occur in 

 association. This fact, considered in connection with the 



