Left.. 330 



Leptcena trilohata. See Strophomena trilobata. // g. 



Leptaena ? abundant in the Orinoidal limestone of the 



Pittsburgh series (Lower Barren Coal Measures). Stevenson 

 in Trans. Am. Phil. Soc. Philada. Vol. 15, page 26.— X/F. 



Leptocoelia acutiplicata, {Atrypa acutipUcata^ Conrad, 

 Ann. Rt. N. Y., 1841, Upper Helderlerg.) Found by I. 0. 

 White, in the Selinsgrove lower limestone^ {Corniferous^ or 

 Marcellus) in Northumberland Co., Pa., G7, pp. 79 _, 80, 360- 

 See Claypole's 91-1; 223-5 (nine).— FZZ/«, h 



Leptocoelia dichotoma (now Coelospira dichotoma.) See 

 Appendix. 



Leptocoelia flabellites {Atrypa HabelUtes ^GonxdiA. A.n,^i. 

 N. Y., 1841, Oriskany,) Found by 1. 0. White, in Cooper town- 

 ship, Montour Co., Pa., G7, pp, 86, 297. Claypole's Catalogue, 

 Spec. 95-8. In Bedford Co., on Wills creek, bed 39 of the 

 Hyndman section (104' to 169' beneath the top of Oriskany) is 

 rich in it. Stevenson, T2, 104.— VIL 



Leptocoelia hemispherica {Atrypa hemispherica.) Hall, 

 V 1843, page 72, fig. 17, 4. Clinton. (Sowerby, p. 829, in 



Murchison's Silurian Researches, pi. XX, f. 7. — At 

 Matilda furnace fossil ore bank, Mifflin Co., Pa., in 

 ■ the Clinton roof shales. Hale & Hall got specimens 

 503-1-2-7. — At Patton's limestone ore bank, near HoUidays- 

 burg, Blair Co., Sanders got specimens 513-1, 513-8. — At Cam- 

 bria Iron Co.'s slope on Frankstown fossil ore iedj specimen 

 514-2 (?) — In the roof slate of the Frankstown bed, specimens 

 515-2 (?) and 515-3.— F«. 



Leptocoelia imbricata, Hall, 10th Rt. 1857. Lower Held- 

 erSer^, crowded in a thin layer of limestone (150' beneath the 

 bottom of Oriskany sandstone) at Bedford station, followed 

 by Stephenson to Bedford, and well exposed under the African 

 church. T3, p. 149. — VL, — See Appendix, 



Leptocoelia intermedia. See Appendix. 



Leptocoelia ? in the shales enclosing the Clinton sili- 

 ceous fossil ore bed, 1^ miles beyond Yellow creek, Hopewell 

 township, Bedford Co., Pa., T2, p. 198. — Va. 



Leptocoelia ? a rare form ; Specimens 810-1 and 810-4, 



in Fellows' collections in Hogs-back ridge. Pike Co., Pa., from 

 Tipper Helderherg rocks^ Villa. 



