153 



Prioniodus (?) ALATU8. Hinde. (Fig. 331.) 

 (Quart. Join-. Geol. Soc, Vol. XXXV., p. 361, 

 PI. XVI.) 



Distinguishing Characters. — Base narrow, 

 arched; large triangular, depressed, convex 

 main end-tooth, with reentrant base; denticles 

 five, short, blunt, indistinctly marked off from t2^r l V$£ 

 base. , ,li,;lle, • 



Found in the Conodont bed of the Genesee, at Section 1. 

 (Hinde.) 



Genus POLYGNATHUS. Hindi:. 



[Ety. : Polys, many ; gnathus, jaw.] 

 (Quart. Jour. Geo]. Soc, Vol. XXXV., p. 361.) 



This name was proposed by Hinde for animals possessing 

 numerous, variously-formed conodonts, and minute, tuber- 

 culated plates. 



Polygnathus nrBius. Hinde. ( Fig. 84.) (Quart. 

 Jour. Geol. Soc, Vol. XXXV., p. 362, PL XVI. ) 



The very variable teeth associated by Hinde under the 

 above name (from being- found together in a patch one- 

 fourth inch in diameter) are, by him, divided into pectinate 

 teeth (Fig. 34, a-g), fimbriate teeth ( Fig. 34, h, i), and 



Fig. 34. Polygnathus dubhts. (a-g) Pectinate teeth: (h, i) fimbriate teeth; <A\ /) 

 [•rested teeth ; (in) plate. All x 13 (after Hinde). 



