Grod. 



506 



Orodus variabilis. Newberry, Pal. Ohio, Vol, 2, 1875, p. 



50,pl.58,figs. 

 11, back of 

 large tooth ; 

 11 (X, 5, crown 

 and front 

 views; 11 0, 

 d^ e^ f, .(7, A, 

 smaller teeth 

 of the same 

 series. At 

 Sciotoville, O., in the black shale of the Waverly^ X, 



Orodus 



? Fish scales common in the Meadville 



upper limestone^ at Glendale, Pa. Q4, p. 83, 140. — X, 



Orthacanthus arcuatus. Newberry, {Pleur acanthus arcu- 



J. ^ ^ ^l^^^atus, New.) Pal. 



AU^ - , . ^.— .^^-.^— -~ 7-^ ^ - ■ . Ohio, I, 1873, p. 332, 



^ pi. 40, fig. 4 ; the spine 

 of a Pleuracanthoid 

 fish, attached to the 

 J^ack of the head and 

 -^T-?^-^ supporting a head-fin. 

 ^ ' See Brongniart's fine 

 . reproduction of the 

 recently -disc o v e r e d 

 fcti QhJQ.X-. Pleuracanthus 



gaudreyi. — Not uncommon in the Linton cannel coal of Ohio, 

 coated with sulphide of iron and looking like metal stilettos of 

 formidable utility ; accompanied by Diplodus teeth in great 

 abundance, each Diplodus having several hundred teeth and 

 only one spine. In several cases the spines were found buried 

 in (apparently) a mass of head cartilage, with a Diplodus jaw 

 set with teeth — thus anticipating Brongniart'S discovery. XIII, 



Orthacanthiis gracilis. Newberry, PaL Ohio, Vol. 2, 1875, 



xm.) TmV'5-7 Neu):r:aT.aX p. 56, pi. 59. fig. 



7. Coal meas- 

 ures, Linton , 



Ohio.— x/yy. 



