Alve. ^U 



Oat. p. 234, sixteen specimens, 601-24. Another specimen, 

 equally doubtful is 601-34. 



Alveolites ? With the last at Orbisonia. — VI. 



Ambocoelia biconvexa, n. s. 01 ay pole, in the Salina 

 rocks of Montour Co., etc., extends from the Bastard limestone 

 up to the Oriskany, Veto VII. I. C. White. Keport G7, p. 101. 



Ambocoelia umbonata. (Orthis nucleus.) Hall, page, 

 yuih. 180,hg. 71, 8. Vlllh. Marcellusand F///(?. Hamil- 

 ^ ton. See Conrad J. Ac. N. S. Phila. Vol. VIII. At 

 ^^W Marshall's Falls, Monroe Co., eastern Pa., it was collected 

 'f^ bv C. E. Hall from both the Marcellus ( Vlllb) and 

 Hamilton proper ( VIII c)] also by Claypole in Perry 

 Co., middle Pa., from both. On the Susquehanna, I. C. White 

 found it in the Selinsgrove Lower and Upper limestones. G7, 

 pp. 79, 80, 360 ; near the top of the Marcellus p. 76, 230 ; in 

 Huntingdon Co., McConnellstown section, near HefFner-s mill, 

 abundantly 10' below top of Marcellus, T3, p. 198; abundant 

 along Murray's run, E. Oneida township, p. 261 ; also at Cove 

 station, p. 115; at the Car Works in Huntingdon, p. 115; vast 

 numbers in top beds of Marcellus between McConnellstown and 

 its railway station ; also 203d mile post near Huntingdon, p. 113. 

 In the Hamilton Lower inhales., at the Coffee Run RR. quarry, 

 Huntingdon Co., T3, p. 112. On the Susquehanna, I. C. White 

 found it in Hamilton Shales, G7, p. 75 ; at the base, 50' from 

 the top, and at the top of the Hamilton sandstone mass, p. 219, 

 230, 359 at Selinsgrove. In Huntingdon Co., in Hamilton 

 Upper shales.^ at Mapleton, T3, p. 109, and in the Patterson 

 section, p. 186. In the Tally limestone, I. C. White found it 

 on Little Fishing creek ; in Madison, Columbia Co.; at Cata- 

 wissa ; in Liberty township, Montour Co. ; and at South Dan- 

 ville, G7, pp. 75, 207, 229, 289, 310, 352. It is in fact the most 

 abundant fossil in the Tully limestone in middle Pa., T3, 108; 

 the only perfectly defined shell in the mass of broken shells, 

 p. 108; as at Cove station, Huntingdon Co., p. 107, and No. 4 

 of the Mapleton Section, p. 273. Li the Chemung strata., two 

 of its horizons are at 275' and 300' below the Lackawanna 

 (Chemung Upper) conglomerate, at Haun's Bridge, Hunting- 

 don Co., T3, p. 98. It is astonishing to find it in the Carbon- 

 iferous lime shale below the Pittsburgh coal bed, near Harvey's 

 five points, Westmoreland Co. C. E. Hall's collections, MS. 



