150 



w 



Genus CORNULITES. Schlotheim. 



I Ivi'Y. : Gornu, horn ; litJios, stone] 

 ( L820: Schlotheim Petrefactenkunde, p. 378.) 

 Tube gently tapering, flexuous, the small end usually bent. 

 The tube either wholly or in part adhering to other objects. 

 Walls thick cellular, composed of imbricating rings. Sur- 

 face ornamented by annulations and longitudinal stria?. 

 Interior presenting a succession of annular constrictions, 

 giving: a scalariform character to the cast. 



CORNULITES IIAMILTOXI.E. S]>. U()V. ( Fig. 



32.) (Compare Pal. X. Y., Vol. VI.. p. 52, 

 Fig. 12.) 

 Distinguishing ( 'haracters — I nif< irm cur- 

 fig. 32. comuiitea vature of base, which makes nearly or quite 



hamiltonice. The type . , , . ,, ,, • ,■ c ,i 



specimen enlarged a- right angle with the mam portion oi the 



eight diameters. (Or- , 



igmai.) tube; uniform rounded annulations; attach- 



ment by whole surface. Found in the Pleurodictyum beds of 

 Avery's ('reck. 



CONODONTS. 

 Genus PRIONIODUS. Pander. 



[ Ety. : Priomon, small saw; odous, tooth.] 

 (1851: Monograph, d. Foss. Fische, d. Sil. Syst, p. 28.) 

 "Jaw" with a narrow basal portion, which supports 

 numerous delicate denticles; and an elongated tapering- 

 tooth, which extends below the basal portion. 



Prioniodus erraticus. Hinde. ( Fig'. 33A.) (Quart. 

 Journ. Geol. Soc, Vol. XXXV., p. 359, PL XV.) 



Distinguishing Characters.— Short, narrow, slightly- 

 arched base; larger cylindrical curved 

 main end-tootli. projecting obliquely 

 outward, forming an obtuse angle with 

 base. Denticles five, small, upright. 



Found in the Conodont bed of the 

 Genesee, at Section 1. ( Hinde.) 

 Prioniodus abbreviatus. Hinde. (Fig.33B.) (Quart., 

 four. Geol. Soc, Vol. XXXV., p. 359, PL XV.) 



Fig. 33A.. 

 erraticus, x 

 Hinde). 



i after 



