23 



A:\iBO. 



* i j •' I f i 



Hall.d 



AmbonycMa radiata. (Pterinea carinata^ Conr. Van. 



and Emmons,) Hall, Pal. N. 

 Y., Vol. L 1847, p. 292, plate 

 80, fig. 4 b. — //, G> Trenton ; 

 ///, h. Loraine shale. Geol. 

 Pa., 1858, page 821 ; no figure. 

 One of the commonest Hudson 

 Kiver fossils, from bottom to 

 top, (but unknown in Utica 

 slate or Trenton limestone) in 

 New York, Ohio, Ind. and Ky. 

 Hall. Also in 

 Centre Co., Pa., 

 ■I Geol. Sur. Rt. 

 T4, p. 427. In 

 Bedford count}^ 

 Pa. it ascends in 

 the series, being 

 found by J. J. 

 Stevenson in one 

 shaly parting of the Medina red rocks IV h, (the Oneida IV a^ 

 being there absent) along the Tussey mountain outcrop ; 

 in the Chambersburg, Bedford turnpike, through Evitts moun- 

 tain, Rt. T 2, pp. 92 and 166. — Inside and hinge structure 

 shown by Hall. Pal. N. Y. Vol. 3, p. 269 and 523, wood cuts. 

 Ambonycliia undata. {Pterinea undata,) Emmons, page 



395, fig. 106, 1. Ill, Black river lime- 

 stone, and // c. Trenton. — Described by 

 Emmons as a rare species, found in the 

 grey beds of the Trenton limestone forma- 

 tion at Watertown,N. Y. It is not remark- 

 able therefore that it has not been reported 

 as yet found in any of the Trenton, Birds- 

 eye, or Black river limestone outcrops in 

 Pennsylvania. // c. 



Aniiiionites ? See Appendix. — An ammonite occurs in 



the Crinoidal limestone (black) near water level at Pittsburgh, 

 Pa. — J. J. Stevenson. See L, p. 21 ; also HHHH, p. 241 ; Geol. 

 Pa. 1858, p. 600. A large species at the Livermore tunnel, 

 Indiana Co. XIV, 



