154 



crested teeth ( Fig-. 34, A', 1 ). Hinde's iig-ure.s are here reprcj- 

 (Inced. 



Pectinate Tel:th, A. (Fig. 34, a-d.) 



Distinguishing Cbnraeters. — Nari-ow. sHghtly arehed 

 base; main central tooth sometimes produced bek)\v in a 

 si)ur; denticles slender and acute, foui'teen to twenty. 



Found in the Conodont bed of the Genesee stage, at Section 

 1 (abundant); in the Genesee shale, Section 1 (?) (Hinde); 

 and in the upper Moscow shale, at Section 1 (rare). 



Pectinate Teeth, B. (Fig. 34, e-g.) 



Distinguishing Ciianicters. — Straight, almost linear, base; 

 teeth all sindlar. central one longest, sometimes as many as 

 fourteen; occasionally smaller denticles l)et\veen. 



Found at North Evans, in the Genesee shale. ( Hinde. ) 



Fimbriate Teeth. (Fig. 34, h, i.) 



Distinguisliing Characters. — Straight, nari'ow. elongate 

 base, pointed at one end ; delicate main tooth near blunt 

 end; denticles, thi-ee on one side; very many extremely 

 minute ones on the other side, often varying in size at regu- 

 lar intervals. 



Found in the Genesee shale, at North P^vfuis, Section 1 (?). 

 (Hinde.) 



Crested Teeth. ( Fig. 34, A-. /. ) 



Distinguishing Characters. — ( A ) ('ompressed base of nearly 

 uniform width; one end abruptly contracted; crenulations 

 (denticles) about twenty. (Fig. 34, A*.) 



(B) Part of base narrow and thickened, \vitli sometimes a 

 row of minute crenulations on upper edge; remainder of base 

 snmll ; flattened crest, with five to eight denticles. (Fig. 

 34, A) 



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

 (Hinde.) 



Plates. — Small, elliptical, smooth-edged plates, with 

 one surface slightly convex, bearing a longitudinal ridge, and 

 having a granulose surface on one side and a smooth one on 

 the other, were found associated with the above teeth at 

 North Evans, by Hinde. (Fig. 34, m.) 



