151 



Fig. 84B. Prioni 



mills alilut nil Ins, x 

 18 lal'lrr lliinli'i. 



Fig. 33C. Prionio- 

 dus clavatus, x 13 

 (after Hinde). 



Distinguishing ( 'haracters. — Short, stout 

 base; long, nearly straight, cylindrical, 

 blunted main end-tooth ; denticles 1 \v<>, small, 

 blunt, with knobs at their summits. 



Found in the Conodont bed of the Genesee, 

 at Section 1. (Hinde.) 



Prioniodus clavatus. Ilinde. ( Fig. : , ,: , ,('.) (Quart 

 Journ. Geol. Soc, Vol. XXXV., p. 360, PI. XV. ) 



Distinguishing Characters. — Arched , nar- 

 row, stout base, convex in section; main 

 central tooth straight, cylindrical, and 

 blunted ; denticles similar to central tooth, 

 four on one side, two on the other. 



Found in the Conodont bed of the Gene- 

 see, at Section 1. (Hinde.) Upper Moscow shale, Section 

 1 (rare). 



Prioniodus angulatus. Hinde. (Fig. 33D.) (Quart. 

 Jour. Geol. Soc, Vol. XXXV., p. 360, PI. 

 XV.) 



Distinguishing Characters. — Narrow, thin, 

 arched base, the two halves meeting at an 

 acute angle ; m a in tooth central, long, 

 straight, compressed, with median longitudi- 

 nal groove; denticles, four on each side, 

 slightly curved ; delicate and brittle. 



Found in the Genesee shale, at North Evans, Section 1 (?) 

 (Hinde.) 



Prioniodus acicularis. Hinde. ( Fig. 33E.) 

 Jour. Geol. Soc, Vol. XXXV., p. 360, PI. XV.) 



I) i s t i n g u i s bin g 

 Characters. — Wide, 

 thin, polished and 



Fig. 33D. Prio- 

 niodus angulatus, 

 x 13 (after Hinde) 



(Quart. 



transparent, straight 

 or slightly arched 

 basal portion. Main 



I Fig. 33E. Prioniodus acicularis. Two styles of 



tooth near one end teetb ' x 13 ca£ter Hinde) - 



large, slightly curved, compressed; denticles, two on one 



