i6 Bulletin s4 4^ 



Subgenus SCAPHARCA Gray 

 IScapharca) secticostata Reeve 



Arm secticostata Reeve, Conch. Icon., Area, No. 38, pi. 6, 



1844- 



Ayiomalocardia Floridiaiia Conrad, Amer. Jour. Conch., vol. 

 5, p. 108, pi. 13, fig. 2, 1869, 



lienosa Dall, Bull. 37, U. S. Nat. Mus., p. 40, 1889. Not 

 Uenosa Say which is fossil only. 



secticostata Dall, Tran, Wagner Inst. Sci., vol. 3, pt. 4, p. 

 636, 1898 ; Vanatta, Proc. Acad. Nat. Sci. Phila., vol. 55.. 

 P- 756, 1903 ; Sheldon, Palgeont. Amer., vol. i. p. 36, pL 

 8, figs. 3, 4. 5, 1916. 



lienosa var. fIorida?ia Mitchell, List Texas Shells. 

 Remarks ; This comparatively rare shell has been confused 

 with its ancestral tj'pe, Area lieftosa of the Miocene, first 

 described by Say. 

 Distribution. — Hatteras to Trinidad. Pleistocene to Recent. 

 Gulf coast. — Recent : St. Joseph's Bay and Crooked 

 Island, West Florida ; Long Key, Gulf of Mexico ; Gal- 

 veston, Texas. Pleistocene : North Creek, Little Sara- 

 sota Bay, Fla. 



(Scapharca) santarosana Dall, Trans. Wag. Inst. Sci., vol. 3, pt. 

 4, p. 641, pi. 31, figs. 2, 10, 189S. 

 santarosana Maury, Bull. Amer. Pal., vol. 3, p. 375, 1902 : 

 Sheldon, Palseont. Araer., vol. i, p. 38, pi. 9, figs, i, 2, 3, 

 1916. 

 Distribution. — Miocene. Chipola River marl, Calhoun Co.. 

 and the Oak Grove sands, Santa Rosa Co., Fla. Also the 

 lower bed. Alum Bluff, Fla. Bacom No. i well, near 

 Mobile, Alabama at 1500- 1556 feet, Oak Grove horizon ; 

 Bacom No. 2 well at 1241 and 1600 feet. (Well speci- 

 mens in Aldrich's collection). 



