233 LiGNiTic Stage 41 



will suflficientl}' separate it from G. pitcherii. 



' ' The specimens are in the Museum of the Smithsonian Insti- 

 tute ( No. 570 ), and are from a light gray sandy marl. 

 " Locality. — 'Nanafalia,' Alabama. 



"Length, 1.7 in. Greatest width, 1.3 in. Width at the hinge, 

 .6 in. Greatest height of valve, .8 in. Height at the hinge, .7 

 in. lycngth from the basal margin, over the umbone, to the 

 beak, 2.3 in." 



Localities. — Alabama : R. R. cuts 1-2 mile north of Pine Hill ; 

 Nanafalia ; Gullette's Landing ; Bell's Landing 

 ( scarce) ; Smith and Johnson report this species 

 as abundant in Grampian Hills, south of Camden. 

 Langdon reports it from Conecuh River, Se(5l.2i,T, 

 8, R. 19, E., and from Chattahoochee, between Ft. 

 Gaines, Ga. and Wood's shoals, 



Ostrea alabamiensis Lea. Pl. 6, fig. 7. 



A few fragments were found at Hatchetigbee bluff that seem 

 to belong to this species. The discussion of the species wnll more 

 properly come in a future Bulletin on the Lower Claiborne stage. 



Ostrea sellaeformis Con. PI. 6, fig. 2. 



Aldrich has identified this species from Hatchetigbee bluff, 

 Bull. Geol. Surv. Ala., p. 50 1886, and we have a few small and 

 ill preserved specimens perhaps belonging to this species from the 

 same locality, and 4 miles above Hamilton Bluff, on the Alabama, 

 yet the identification is doubtful and the species had best be con- 

 sidered under the Lower Claiborne stage. 



Plicatula filamentosa, var. Pl. 6, figs. 8, 9. 



Syn. P. filauientosa Con., Foss. Sh. Tert. Form., Aug. 1833, p. 38. 



P. mantelli Lea., Cont. to Geol., Dec. 1833, p. 89, pl. 3, fig. 68. 

 P. filamentosa Aid., Bull, i, Geol. Surv. Ala., p. 50, 1886. 



Conrad's original description. — " Shell suborbicular, narrowing 

 toward the apex, much compressed; with seven costse; and dense- 

 ly imbricated with small, irregular, concentric wrinkles, and with 

 minute radiating lines. Breadth and length about ^ of an inch. 



"■Locality. — Claiborne, Ala. Cab. Acad. N. S." 



The variety in question differs from the typical Claiborne speci- 



