illlTH. 



40 



(Wills mln.) has these strata covered with the impressions (T2, 

 139); Evarts' mountain, abundant throughout the lower beds 

 of white Medina, on Rainsburg Gentreville road (T2, 146.) — 

 In Centre Co. the only fossil in the White Medina of Bald Eagle 

 Mtn. (T 4, 429, — IV c, — For description of iigure on page S9 

 see Appendix. Specimens in the Cabinet. 00, Pal. Cat. five 

 specimens, 400-1, collected by Chance, at Port Clinton, Schuyl- 

 kill Co., 1874, from Oneida Conglomerate^ IV a; and 401-2 

 (two) by Billin, at Greenwood, Huntingdon Co., 1876, from 

 Medina SS. IVb. 



Arthrophycus montalto, Simpson. 1888. Figure by G. B. 





ms§Sii&i:-^i^^^^S^^^^^^^^^^^^3^^^F^^^^^^ 





■>\WA>&Pvxx„- ,.^ .„ ^ as 





D-\\ E-dgccos cQ\r:a^:Chcanh(iv%bar^^ . C(iiarty (xl: Mont Alia., Pc 



Simpson, 1888, from reduced photograph of specimen by Rev. 

 J. Edgar, Prest. Wilson Female College, Chambersburg, Pa., 

 discovered by Col. Wiestling in thefoundaiion wall of old saw- 

 mill at Mt. Alto Iron Works, and traditionally taken from a 

 quarry of hard rough sandstone, east of the company's oiRce, 

 up the mountain side, above another quarry of soft crumbling 

 sandstone presumably No. 1, Potsdam formation. Search at 

 the quarry failed to find another specimen. It seems impossi- 

 ble that Medina Sandstone (No. IV) should be there. The fos- 

 sil resembles that of the Medina, but imitates a crinoid stem 

 by regular cross lines on a flat surface. The '' White Rocks" 

 north of Moat Alto resemble Chiques Rock quartzite at Colum- 



