MURC. 



428 



preserved, showing the characteristic generic arched or undu- 

 lating strias. Specimen found near Newark, Wayne Co., N. Y., 

 but not yet in Pennsylvania Salina rochs^ Vc. 



Murchisonia ? confusa. Whitfield. Ila, See Appendix, 



MurcUsonia conula. See Pleurotomaria conula. XI. 



Murchisonia desiderata, Hall. 15th Annual Report, N Y., 



Wl a 



:fj? 



1862,page 50,plate 4,fig. 12. 

 — Upper Heldevlerg for- 

 mation^ VIII a. Concen- 

 tric striae on the surface 

 ^r^m^^ .. r aised in little bundles (f as- 



Piall/S^' ^^'^' cicles), bending backward 

 gently from the sutare,reach the flattened spiral band. This shell, 

 living with M. maia, and M, leda, differs by its greater length 

 of volutions and flattening on the upper side. Upper Held- 

 Corniferous limestone at the falls of the Ohio. Probably some 

 of the many New' York casts were made by it (Hall) . — Villa* 

 Murchisonia elegantula. See Pleurotomaria elegantula. 

 Suhcarhoniferous. XI 

 Murchisonia gracilens. Whitfield Ila, See Appendix. 



Murchisonia gracilis ? What Emmons calls a Pleuroto- 



^^g*;^^ maria, in his Report on the second Dis- 



Hrb«^^.^..'^^^« trict of New York, 1842, page 404, fig. 



^^3^^^^^^^^ 113, 3, from the loraine {Hudson River) 



Murchisonia gracilis. (H. D. Rogers, Geol. Pa., 1858, page 



jri.b.-^^r-v- --^^ ^^^- ^^ figure.) Hall, Pal. N. Y., Vol.1, 



1847, pi. 39, fig. 4 5, Hudson river. Geol. 

 Canada, 1863, p. 183, fig. 178. Trenton for- 

 x^^ mation^ lie. In Huntingdon Co., Pa., it is 



Hall Vol. Lot.39.f!^,il..b. occasionally found in some of the Trenton 



P/, heds on 



'the Lit- 

 tle Ju- 

 niata. 



Hall, T3, p. 367. In Centre Co., Ewing (T4, 424, 427), reports 

 it from both the Trenton limestone and loraine shale. lie, 



V* f^ 



actii. 



