150 

 Genis r()RNULlTP:s. Srin.oTHKiM. 



[ Ety. : ('or/in, horn ; litlton. stone] 

 (1830: 8clilotlieim PetivfactenkuiKk'. p. ;378.) 

 Tube ii'entlv tapei'iii<>', flex nous, the small end usnally bent. 

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

 Walls thick cellnlar, comjiosed of iml)ricating rings. Snr- 

 face ornamented l)v annnlations and longitndinal stritP. 

 Interior presenting a snccessioii of annnlar constrictions, 

 giving a scalariform character to the cast. 



CoiJM i.rri:s hamiltoxl^-:. sj). nov. (Fig. 

 ?>2.) ((\)ni])are Pal. X. Y.. Vol. VI.. p. .-.i>, 

 Fig. V2.) 

 PjJS^^ Disthi<iiiisliinii- Charnctfrs. — Uniform cnr- 



FiG. 33. cornuiifes vatnrc of basc. whii-h makes nearly or quite 



hamiltonio!. The type . • i i • '• l- i 



specimen eniarked a right aiiglc With the iiiam i)oi-tion oi the 



ei^ht diameters. lOr- 



if?i"ai) tnbe; uniform i-ounded annnlations; attach- 



ment Iw whole surface. Found in the Pleurodictynm beds of 

 Avery's Creek. 



CONODONTS. 



Genus PRIONIODUS. P.inder. 



[Ety.: Pi'ioiiion, small saw ; ixfoi/.t, tooth. 1 

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

 "Jaw"" with a narrow basal portion, wliich supports 

 numerous delicate denticles ; and an elongated tapering 

 tooth, which extends below the basal portion. 



Prioxiodus erraticus. Hinde. (Fig. o^JA.) ((]nai-t. 

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



Distingnisliing Characters. — Short, narrow, slightly- 

 arched base: larger cylindri(;al curved 

 main end-tooth, })roiecting obli(}nely 

 outward, forming aii obtuse angle with 

 V)ase. Denticles five, small, u])right. 

 e,-!^/c,S^x "^r'S^:^ Found in the Conodont bed 'of the 



^''"'''- Genesee, at Section 1. ( Hinde. ) 



Priomodis AiiRREviATrs. Hiudc. (Fig. 3'jB.) ((Juart. 

 Jour. Geol. Soc, Vol. XXXV., p. 859, PI. XV.) 



