Kens. 



858 



Cumberland, Maryland. Also in Huntingdon Co., Pa., at Orbi- 

 sonia and Three Springs ; ends of Royer's and Sandy ridges 

 (T, 35; T3, 119; C. E. Hall's list of his collections in 1875. 

 Proc. A. P. S. Jan. 5, 1876.) VIL 



Rensselaeria mutabilis. {Meganteris mutaUlis. Hall, 

 1857, 10th An. Rt.; Pal. N. Y. Vol. 1, p. 

 254, plate 45, figs. 2 /; 2 g^ natural size. Low, 

 Held,) In Perry Co., Pa., Clark's mill, 2^ m. 

 N. W. of New Bloomfield, Claypole's spec. 6-9 

 (000, 11800, six small specimens, some of them 

 in fair condition. G. B. S) ; also, 12910 ? From Lower Helder- 

 herg upper shales^ VL In Pike Co., found by Dr. Barrett in 

 his •' trilobite ledge " (G6, p. 132, 134) both in White's Storm- 

 ville shales and Stormcille limestone, VL, 



Rensseleeria ovalis,Hall {Meganteris mutaUlis) 10th Re- 



'■{. Vo!.!!!. 



P\AS. 



gents' Report, 1857. Lower LLelderlerg, F/— Geology of 

 Canada, 1863, page 562, fi^, 471 a, ventral valve; J, mould of 

 the interior; c, mould of interior of dorsal valve. Oriskany 

 sandstone, VLL, — In Pennsylvania it is abundant in the out- 

 crops of the Oriskany around Montour's ridge on the N. Br- 

 Susquehanna. (G7, pp. 86, 297, 310, 372 ; and Claypole's spec. 

 95-12 (000, 12364, Meristalata? G. B. S.) from Grove Bros, 

 quarry. Also, in Huntingdon Co., casts in the upper beds, at 

 the Car Works, West Huntingdon ; and at Orbisonia and Three 

 Springs (T3, pp. 119, 259.) Also in Bedford Co., Hyndman 

 Section, abundant in beds 50', and 104' to 168' below the top 

 of the Oriskany (T2, 86, 103,104.) VLL 



Rensselaeria ovoides. ( Terebratula ovoides, and 7. per- 

 ovalis, of Eaton, Text Book of 1832; Atrypa elongata, Conrad, 

 Ann. Report N. Y. 1839, p. 63 ; not the Pentamerus elongatusoi 



