Grin. 160 



dall's Warren section (IIII, p. 305); stems and flower-heads 

 interspersed promiscuously with pebbles, a mile from two wells 

 near N. Y. State line, Elk township, Warren Co. (p. 335) and 

 in a peculiar local conglomerate, under the Sub-Olean, at Mrs. 

 Krupp's 2 m. S. W. from Warren (p. 34&) ; at Sneider's sum- 

 mit, beds 3, 5 (p. 331) ; in the Third Mtn. Sand (p. 273) ; " Star- 

 fish crinoids," Cystidea^ Archceocidaris, etc., in the Subcarb. 

 middle 200' of Randall's Warren section (I, p. 53); crinoids 

 rare in the lower 500' (p. 54) ; see specimens of stems in Cat. 

 of Coll. (O, 3227, 3315, 3321, 3398, 3399, 3400) in Warren, Ve- 

 nango and McKean Co., mostly in sandstone, but at various 

 horizons. VIII-IX-X\ also Spec. 3281,3334 of crinoid impres- 

 sions in sandstone, with Spirifera and OrtJiocaras, | m. N. of 

 Warren. Stems and discs are numerous in the flags of Mill 

 run at the Meadville oil well, fine specimens in Carll's collec- 

 tions (Q4, 171); and in the Saegertown ravine, sandstone, 

 Woodcock, Crawford Co. (p. 196). Furrowed stems cover the 

 underside of bottom layer of Third Oil Sand at the Carroll 

 quarry, Le Boeuf, Erie Co. (p. 240). Stems were found by 

 Stevenson in the gaps of the Conemaugh and Youghiogheny 

 (K3, p. 310).— ZZ, X, XL 



In the Pottsville conglomerate {Mercer upper and lower 

 U7nestones)^ in Mercer and Lawrence Cos. (QQQ,37, 41, 97, 

 109, 110, 138) ; abundant in Wayne t. (p. 62, 100, 129) ; these 

 probably furnished the minutely broken-up discs of the sand 

 pumpings of the Boyds-hill gas-well at Pittsburgh, from top of 

 blue rock at 642', i. e. 900' beneath the Pittsburgh Coal (Re- 

 port L, p. 225).— X//. 



In the Lower Productive coal measures {Allegheny river 

 series) Ferriferous limestone^ in Beaver Co. abundant on 

 Whistler's run, Fanporte, etc. (Q, p. 60, 61, 193); in Mercer 

 and Lawrence Cos. at Wampum and elsewhere (QQ, 47, 106; 

 QQQ, 25, 78). Also in the Fine creek limestone in McCand- 

 less township, Allegheny Co. (Q, p. 33, 168, 179).— XZ/7. 



In the Barren measures {Fittshurgh series), Crinoidal 

 {Black fossiliferous) limestone, 250' beneath Pitts. C. (K, 76, 

 79, 80, 82), stems, half-inch thick, abundant in W. Va. (Trans. 

 A. P. S. XV, 26, and L, 21); a few near top, Fayette Co., Pa. 

 (L, 36) ; crowded, at M. Scott's, Donegal, Westmoreland (K3, 

 117) ; innumerable white stems on black slate, top layer, Men- 



