Athy. 52 



61, 78, 129; QQQ, pp. 77, 78, 138 )— In Fayette Co. replaced 

 by calc spar, in Subcarboniferous limestone, No. XI, (KK, p. 

 291.) — It is probably the Athy vis of Mansfield's Kittanning 

 coal at Oannelton, Beaver Co., Pa., C. E. Hall, Ms. Kt. Dec. 

 30, 1876. I. C. White recognized it in Beaver and S. Butler 

 Cos. in five horizons, Crinoidal Z./ Pine Creek L.; Brush 

 Creek L.; Ferriferous L,; and Mercer L, (Q30. 33, 264, 62, 

 200, 62. )—XI to XII, ( See Appendix, ) 



Athyris trinucleus. ( Terehratula trinucleus Hall, Trans. 



X/. f Z ''.^. J^ ■'A'^\ .-^Ste. 4, 7. 1856: 



Iowa re- 



Whitfield, Bull. 3, Am, Mus., p. 50, pi. 6, figs. 22-27, 1882.) Col- 

 lett's Indiana of 1882, page 329, plate 29, figs. 22 and 23, two 

 specimens from Bloomington, showing variations of form; 

 figs. 24 to 27, a larger specimen from Spergen hill. — Subcar- 

 boniferous. XI 



Athyris ? 00, Pal. Coll., p. 235, spec. 806-9, by Fel- 

 lows & Genth, 1875, at Dietrick's, ^ m. n. of Marshall's falls, 

 Monroe Co., Pa., from Ham. shale,, VIII c, 



Athyris ? New species? Specimen 850-14 (three fair 



specimens unlike any known to G. B. S.,1888) in Sherwood's 

 collections, 1875, at Lawrenceville, Tioga Co., Pa., from Che- 

 mung strata,, VIII g, 



Athyris ? Spec. 85U-2, from Lawrenceville, Tioga Co., 



Chemung,, VIII g, 



Atops punctatus See Ptychoparia trilineata. Middle 

 Camhrian. M, C 



Atops trilirieatus. See Ptychoparia trilineata. Middle 

 Camhrian, M. C 



Atrypa aMnis. See Atrypa reticularis. 



Atrypa altilis. See Rhynchonella altilis. 11^^, l. Speci- 

 imens in the Cabinet, 00, Pal. Coll. page 232, spec. 210-150, 

 by Fellows, 1876, at Belle fonte. Centre Co., Pa., from Trenton 

 limestone, Vic. G.B.Simpson. 



Atrypa ambigua. See Camarella ambigua. II c. 



