194 EOCENE AKD LOWER OLIGOCENE CORAL FAUNAS. 



surrounded frequently by a circle, and near the terminations of the tubes were, in 

 some cases, casts of short ribs. The production of additional lamelhe tubes was ai)i)ar- 

 ently confined to the center. 



Locality. — Jacksouboro, Georg-ia. 



The figured specimen of" Lonsdale is in the collection of the Geological 

 Society of London. It lies in a matrix of white, chalky, argillaceon.s lime- 

 stone, which contains also specimens of Porites {Ocellarid) rnmosa and Cla- 

 docora recrescens. 1 have never found any specimens of the species, and 

 am nnable to add to our knowledge of it. 



The specific name of this corals is invalid, l)ut as the species is doubt- 

 ful I have not proposed a new one for it. 



Genus TURBINARIA Oken. 



TURBINARIA (■?) ALABAMENSIS sp. nOV. 



PI. XXIII, tigs, i to 3; PI. XXIV. 



Corallum massive, the masses may be more than 20 cm. across, and 7 

 cm. thick, upper surface apparently convex or concave. General appear- 

 ance of the corallum is as if conn)Osed of superimposed laminae. Calices 

 shallow ("?), crowded; diameter, 1.5 mm.; distance apart, quite constantlv 1 

 mm. Ca3nenchyma, of superimposed irregularly perforate laminas. Wall, 

 perforate. Septa, perforate, in three complete cycles; 12 septa reach the 

 columella; the members of the third cycles usually fuse by pairs to the 

 sides of an included septum (the first and second cycles can not be distin- 

 guished from each other, and therefore it can not be known whether the 

 septa of the third fuse to the sides of the first or second). Sides granulate. 

 Pali are probably ])resent, but no detail could be made out. Columella 

 very well developed, spongy. 



Locality. — Salt Mouutaiu, 6 miles south of Jackson, Alabama. 



Geologic horizon. — "Coral limestonc," above Yicksburg beds. 



Types . — United States National Museum. 



I have not been able to decide positively whether this is an Actinacis or 

 a Turbinaria. It probably belongs to the latter genus. 



