ACTINOPTERI. 



i6= 



Formation and locality. A single imperfect tooth, with front 

 cutting-edge extending whole length, from Monmouth County 

 (J. H. Slack), without formation. 



Enchodus sp. 



Tooth solid, slightly sigmoid, conic, swelling basally so that 

 transverse section would be deeply elliptical, and apex com- 

 pressed transversely with lateral keel extending downward each 



Fig. ioi. — Enchodus sp. Monmouth Co. (Knieskern). 



side for about two-sevenths length. Edge of each keel under a 

 lens slightly roughened. Surface of tooth entire or smooth, 

 though basally with minute parallel striae of various perfection. 

 Length u mm. 



Formation and locality. A small tooth, without formation, 

 from Monmouth County (P. D. Knieskern). 



Enchodus sp. 



Teeth similar to the last except entirely conic, without any 

 keel whatever. Possibly striae were one time present, but only 

 one example shows basal longitudinal striae now. All are rather 



Fig. 102. — Enchodus sp. 1-2, New Jersey (Burtt) ; 3-5, Monmouth Co. 

 (Knieskern); 6-7, Vincentown (Bryan). 



compressed basally so as to appear elliptical in transverse section. 

 Length of largest 18 mm. 



