175 Midway Stage 6i 



medium, this vigorous species would naturally cast off varietal 

 forms, and it is these with which we now have to deal. 



Localities for typical sinithi. — 



Alabama: i mi. N. of Midway, old field, Wilcox 

 Co.; I mi. S. of Palmer's mill; i^ mi. S. W. of 

 Palmer's mill; Cole's place, W. of Palmer's mill; 

 Pine Bareen creek, 2 mi. S. of Snow Hill; Josh 

 Hunter's, between Snow Hill and Allenton. 



Arkansas and Texas: This variety is also found 

 in the Midway of these States. 



Localities of Dr. Safford's and like specimens. — 



Tennessee: 2 mi. E. of Middleton; 2 mi. S. S. E. 



of Middleton. 

 Alabama: 2 mi. N. of Snow Hill. 

 Georgia: Not far above the mouth of Sandy 



creek, on the Chattahoochee river. 



' Localities of the specimens with about 25 narrow, high ribs. — 

 Tennessee: Hannah's, 1% mi. N. E. of Craines- 

 ville, beds b, d &. f; Huddleston's; 3 mi. W. of 

 Crainesville; >^ mi. W. of Hannah's; McDonald's 

 mill, 4 mi. S. W. of Middleton. 

 Mississippi: Reeves. 2^ mi. N. W. of Walnut; 

 Blue Mt. 



A ST ARTE. 



Astarte sviithvillensis var, mediavia, PI. 5, fig. 4. 



Var. of A. smithvillensis Har., Proc. Ac. Nat. Sci. Phila., 1895, 

 p. 48, pi. I, figs. 8, a; 9, a, b, c. 



Harris' original description. — " Size and general form as indi- 

 cated by the figures; surface in typical specimens marked by strong 

 concentric rugae especially towards the base; these slope gently 

 above but abrupt below and are superimposed by fine striae; um- 

 bones flattened. 



' ' This species shows great variation in form and size as well as 

 markings. At Collier's Ferry, some specimens are more elon- 

 gated, others more rotund; some have crenulations on the interior 

 submargin, while others are smooth. Several of these forms are 

 shown by the figures cited. 



''Localities of the typical form. — Devil's Eye, Colorado river, 

 Bastrop Co. ; Smithville, Bastrop Co. , Texas. 



"Geological Ra7ige. — Lower Claiborne Eocene. 



' ' 7>;;>^.y.— Texas State Museum. ' ' 



