Cora. 



148 



p. 41.) — In Marcellus ( Corniferous f VIII h.) Claypole col- 

 lected corals at Center Mills, Madison t., Perry Co. (Cat. Spec. 

 223-9.) — In Hamilton sandstone ( VIII c) White found corals 

 in Pike and Monroe (G6, p. Ill, 271, 305.) A coral reef com- 

 parable to those of L. Held, age, occurs near the top of the 

 Hamilton upper shales, 120' beneath TuUy limestone, at Cove 

 Station, Huntingdon Co. (T3, p. 107.) In the Tidly limestone^ 

 in Pike and Monroe (G6, p. 109); and under the Genesee slates, 

 in the Mapleton section, Huntingdon Co., is a bed of Helio- 

 phyllum and CystopJiyllum, 6 inches thick (T3, p. 273). — In the 

 Warren Co. district, corallines are numerous in and alove the 

 oil measures (I, 43, 103, J, 104). — In Mercer and Lawrence 

 counties, corals occur in the Mercer upper and lower lime- 

 stones^ between the Upper and Middle divisions of the Con- 

 glomerate No. X//(QQ, 57, 83, 129, QQQ, 109, 110).— In the 

 Pittsburgh series (Barren measures XIV) a few corals and 

 crinoids are mixed with many shells in the Black Fossiliferous 

 limestone. (K3, 308.) — See Encrinites. 



Numerous fragmental specimens may be found in Chance's 

 Coll. on Marshall's creek, Monroe Co., 1874, marked 601-35 

 (see 00, Pal. Coll. p. 235); also spec. 606-11, got at the same 

 place by Fellows in 1875. — Lower Helderherg^ VI 



Coral? or plant? of the Niagara age, the figure of which is 



HalLUi^ 



given by Hall, in 

 Geol. of the 4th Dis- 

 trict of New York, 

 1843, page 116, fig. 43, 

 1. '' The fossil is com- 

 pletely flattened, pre- 

 senting no solid sub- 

 stance, except a thin 

 carbonaceous film," a 

 collection of fine hairs 

 arranged obliquely on 

 a central axis like an 

 animal's tail; struc- 

 ture like some of the 

 solid corals, where the 

 pores are oblique, etc. 

 Niagara^ Vh. 



