NO. 2297. BRACHIOPOD GENUS PLATYSTROPHIA—McEWAK. 423 



in having the lateral slopes occupied by numerous plications, there 

 being 10 and 11 on the slopes of the average specimen. 



Measure) uents. — 32 mm. along the hinge line, 23.5 mm. wide 

 across the middle, 16 mm. high, 16.2 mm. thick, 11 mm. sinal widtli, 

 11 mm. sinal depth, 5 mm. fold depth. 



Formation ami occurrence. — Richmond group: WaynesviUe forma- 

 tion: Waynesville, Oregonia and Oxford, Ohio; Weisburg, Indiana. 

 Fernvale limestone : Wilmington, Illinois. 



Gotypes.~Cat. Nos. 65699, 65700, 65702, 65703, U.S.N.M. 



PLATYSTROPHIA ANNIEANA Foerste. 



Plate 46, ligs. 20-24. 



Orthis annieatta James, Oat. Low. Sil. Fossils Cincinnati <irouj). J87L, p. 10 



{nomen niulem.). 

 I'laiystrophw, nnnieann Foerste, Bull. Sci. La]>. I>enison Univ., vol. 16, 1910, 



pi. 6. fig. 14. 



In the Bulletin of the Denison University (vol. 16, 1910, pi. 6, fig. 14, 

 a, h, c) Doctor Foerste has figured a s])ecies to which Mr. V. P. James 

 had given the catalogue name Platystropliia annieana. Figui-e a 

 shows a form in which the hinge line forms the greatest width; figure 

 c shows one in which the length of the hinge line about equals the 

 width across the middle. Figure h shows a ventricose form with a 

 rounded fold so little elevated as to hardly distm-b the e\ei\ con- 

 vexity of the brachial valve. 



I have before me about 70 sj^ecimens from the Waynesville and 

 Liberty formations of Ohio, Indiana, and Kentucky, which undoubi- 

 edly belong to the species wluch he figm-ed. In most s])ecimens the 

 hinge line about equals the width across the middle. I have, how- 

 ever, mam' in which the hinge line is longer than this width. 



The low rounded fold is occu])ied ])y four and the sinus by tiu'ee 

 nearly equal plications. The sinus is moderately dee]). The slopes 

 are occupied by 10 and 11 ])lications. Those of the brachial valve 

 are com ex with a slight concavity next to the cardinal angles. The 

 slopes of the pedicle valve are concave. 



Measurements. — 33.5 mm. along the hinge line, 28.4 mm. wide 

 across the middle, 18.5 mm. high, 14.6 mm. thick, ]4 mm. sinal 

 width, 8.4 mm. sinal depth, 2.5 nun. fold dejjth. 



Occurrence. — Richmond groui): WaynesviUe formation: Clarks- 

 viUe, Fort Ancient. WaynesviUe, Ohio; Bards town, Kentucky. 

 Liberty beds: Jefferson County, Kentucky, and Clark County, Indi- 

 ana. Wliitewater formation : Richmond, Indiana. 



Plesiotyjyes. ~Ca,t. Nos. 39041, 65651, 6oi){}4:, U.S.X.M. 



