igi Midway Stage 77 



Pleurotoma {Surcula) persa, PI- 7. ng- "• 



Syn. P. persa Whitfield, Am. Jr. Conch., vol. i, 1865, p. 262, 



pi. 27, fig. 4. 

 Whitfield's origi7ial description.— ''Sh&W broadly fusiform; vo- 

 lutions seven or eight, concave on the upper side, and rounded 

 below, leaving a rounded ridge just above the suture hue, 

 columella elongate, very slender, and bent a little backward 

 near the lower extremity; aperture elliptical, not quite as long 

 as the canal below, the two together forming about one-halt ot 

 the length of the shell; deeply notched in the upper part; surface 

 marked with very fine, closely arranged revolving lines, which 

 are crossed by fine lines of growth, having a strong retral cur- 

 vature on the upper part of the volution. 



-Dime7isiofis.-hen^t^oi shell 1. 12 inches, transverse diame- 



ter .35 inch. . _,, „ . . ,, 



"Z,o^a/z/y.— Nine miles below Prairie Blutt, Ala. _ 



By this Whitfield means Matthews' Landing. .It is also found 

 abundantly by the roadside, i mi. W. of Oak Hill P. O. ; also m 

 Dale's Branch. 



Type. — J. Hall collection. 



Speciiuen figured.— V2\. Mus., C. U.; from Matthews' Landing. 



Pleurotoma {Pleurotomella?) anacona, Pi- 7. %• ^^• 



Syn. P. {Pleurotomella) anacona Harris, Proc. Ac. Nat. Sci., 



Phila., 1895, p. 56, pl- 4. fig- 4- 

 Harris' original description.— ''^^n^x2\ form as figured; whorls 

 8- I nea-rly or quite smooth; 2, 3, 4, 5, 6 with (a) a broad 

 slightly concave band showing very faint spira striae and a deep 

 retral curve in the longitudinal striae, (^) a slight basal carina 

 with two or three strong spiral lines and rather faint, slightly 

 oblique nodules; body whorl with more or less alternating coarse 

 and fine spiral lines from the nodose carina to the end ot the 



^^Localities.—^^W at Elgin, northeast corner of Bastrop coun- 

 ty- Smiley's Bluff, Brazos river, 2 miles above Pond creek, and 

 perhaps on Rocky Cedar creek, 5 miles west of Elmo. 



''Geological horizon. — Midway Eocene." 



Type and specimen figured.— "t^^^s State Museum. 



This form resembles somewhat PL adeona Whitf ._, but differs 

 by its longer form, smoother surface and the position of the 

 posterior canal. 



