196 EOCENE AND LOWEE OLIGOCENE CORAL FALTNAS. 



Flabellum striatum Gabb and 'Horn. 



1860. Flabellum striatum Gabh and Horn. Jour. Acad. Nat. Sci. Pbila., 2d ser,, Vol. 

 IV, p. 39!), pi. Isix, tigs. 10, 11, 11a. 



"Thick, wedge-shaped; angle of case acute; laminae thin, edge finely 

 crenate, slightly undulate; sides coarsely granulous; granules regularly 

 arranged in striae, toward the edge of the laminae fine." 



Locality. — Rottcu Hmestoue of Prairie Blutf, Alabama. 



The figures given by Gabb are worthless and the description is entu-ely 

 insuflicient for specific identification. Tlie types sent me from the Phila- 

 deljihia Academy of Natural Sciences are only internal casts, and are not 

 sufiicient for specific characterization, so the species lapses. 



Paeacyathus ( ? ) SEERULUS Conrad. 



1866. Paracyathvs {?) serrulns Conrad. Check List, p. 2. 



1890. Paracyathus {'!) serrulm de Gregorio. Mon. de la Faune ^ocenique de I'Ala., 

 p. 256. 



This species is referred to by Conrad in his Check List of the Inver- 

 tebrate Fossils of the Eocene and Oligocene of North America, but I have 

 been unable to find, either any description or the original types. I searched 

 in both Philadelphia and Washington for the latter. M. de Gregorio could 

 not find, any desci'iption of tlie s'lecies. Conrad referred the species to the 

 Lower or Middle Eocene. 



Platytrochus speciosus Gabb and Horn. 



1860. Platytrochus speciosus Gabb and Horn. Jour. Acad. Nat. Sci. Phila., 2d ser,, 

 Vol. IV, p. 399, pi. Ixix, flgs. 15, 16, 17. 



"Conical, laminae exsert, denticulate and granulous; exterior coarsely 

 striate from the continuations of the exsert lamella.' ; striae alternating in 

 size, coarsely granulous, often denticulate on the edge; depth of cup 

 exceeding half the length of the mass." 



Dimensions. — Leugtli, 0.5 iucli ; brcadth of top, 0.57 inch. 



Locality. — Hardcmau County, Tennessee. (Professor Saff"ord.) Gabb 

 published this as a Cretaceous species, but G. D. Harris has shown that all 

 of the fossils tliat Gabb received from Hardeman County, Tennessee, are 

 Midwayau Eocene.^ 



> Bull. Amer. Paleontology, Vol. I, No. 4, 1896, p. 8. 



