174 Bulletin ,31 174 



The true generic position of this remarkable form we can 

 onl)' determine after better material, showing teeth of both 

 valves and pallial sinus, has been collected. 



Types.— \^. S. Nat. Mus. 



Horizon. — Probably St. Maurice 



Specimens figured. — The types. 



Locality. — Sta. 4589, "Keitt Ravine,' 4.5 miles N. W. of 

 Creston, Orangeburg Co., S. C." 



Ervilia meyeri Aldrich, PI. 52, Fig. 16 



Ervilia meyeri Aldr. , these Bulletins, vol. 5, 1917, p. 5, pi. i, fig. 7. 



For Aldrich 's original description, see the above mentioned 

 volume. 



So far we have found no sample of this minute form. Aid- 

 rich cites it from the Claiborne sand on the Tombigbee. 



Spisula parilis Conrad, PI. 53, Figs. 2-4 



Mactra parilis Con., Foss. Sh. Tert. Form, 1833, p. 42 ; pi. 19, fig. 8 



of Harris' Reprint. 

 M. pygmcea Lea, Cont. to Geol., 1833, p. 44, pi. i, fig. 11. 

 M. pai'i lis Qo-n., Amer. Jour. Sci., vol. i, 1846, p. 217, pi. 2, fig. 6. 

 M. ? parilis Con., Amer. Jour. Conch., vol. i, 1865, p. 3. 

 M. {Cyrei/a f) parilis de Greg., Mon. Faun. Eoc. Ala., 1890, p. 227, 



pi. 36, figs. 1-9. 

 Af. parilis Cossmann, Notes Compl., 1893, p. 8. 

 Spisula parilis Dall, Trans. Wag., Ill, 1895, p. 896. 



Conrad' s best characterization {A.m&r.]r. Sci.). — Triangular, equilat- 

 eral, smooth and polished ; both ends depressed and striated ; umbonial 

 slope slightly folded ; anterior angle with an impressed line ; cavity capac- 

 ious. 



Claiborne, Alabama. 



This species has some resemblance in outline to the M. lateralis of 

 Say, but its specific character is very different. 



Upon re- inspecting our Sabine material it is evident that our 

 var. ^w/rza/a formerly referred (Bull. Am. Pal., II, '97, p. 258, 

 pi. 19, fig. 10) to prcetenuis and afterwards (Geol. Surv. La., '99, 

 P- 503. pl- 53> fig- 4) designated as a disticnt species, is really 



