181 



Oyrt 



E.IOI. A- 



Cyrtina triplicata, new species, Simpson and J. Hall, Proc. 

 A. P. S. Phila. Dec. 1888, founded on a fine specimen, 9476, in 

 Randall's collections at Warren, Pa. from Chemung strata. 

 VIII g. See Figure and Description in Appendix. 



Cyrtoceras expansus. See Appendix. 



Cyrtoceras filosum. (See Cyrtolites Mosus. Conrad) 



ll.l:?.^_,TrmTrriT77]7/r/7777Tr.^ p.311 Emmons' Geology of the 



Second District of the State 

 of New York (north and 

 east of the Hudson river, 

 including the Adirondack 

 and Taconic regions) 1842, 

 page 392, fig. 101, 4, a 

 unique specimen from the 

 Trenton limestone^ its sur- 

 face finely and thickly cov- 

 ered with lines arched on 

 its back. — // c. 

 Cyrtoceras tremtonense. {Orthoceratites trentmiensis.) 



Emmons, page b96, fig. lOY, 2. Trenton 

 formation. — Collected by C. E. Hall^ 

 from Trenton limestone strata in Nit- 

 tany Valley ,^^Huntingdon Co., along the 

 Little Juniata river. (Proc. Amer. Phib 

 Soc. Phila. Jan. 5, 1876.)—// c. 

 Cyrtoceras undulatum. {Oyroceras? undulatum.) Hall, 



Vanuxem, page 139, 

 fig. 33, 2. VII, Scho- 

 harie grit (but not so 

 abundant in this for 

 mation in western New 

 York as further east.) 

 See Hall's Illustrations 

 of Devonian fossils. 

 Found by I. C. White 

 in Monroe Co. on Mc- 

 Michael's creek on the 

 Stroudsburg and Water 

 Gap road, and at other 

 places along the Corniferous outcrops. (G6, 121.) — VIII a. 



