New Species of Trllohite from the Trenton Limestone. 347 



other, and it may be, that one or both of these methods of drilling 

 stone-axes was made use of by the aborigines of this continent. 



Perhaps some of the readers of the Cincinnati Quarterly Journal of 

 Science may be able to quote examples of these supposed cores, and to 

 describe them in some future number. 



Neiv Species of Trilobite from the Trenton Limestone at Trenton Falk, 



K Y. By C. D. Walcott. 



Genus BemopIeurkJes — (Portlock.) 

 E. striatulus, (n. sp.) 



Fin 27. Eemopleurides slrialulus. a Anterior surface of hypostoma. b Ventral surlace of 

 hypostoina. The hypostoma figured is of the same size as that of the tnlobitp A. 



General form obovate, strongly convex. Head subrotund. Gla- 

 bella prominent, central portion slightly convex, broadest at the pos- 

 terior third, contracted at the base, where the width is the same as 

 at the anterior margin of the eyes. A narrow palpebral lobe encir- 

 cles the lateral margins two-thirds the length of the head. Anterior 

 margin narrows and curves abruptly downward. Three pair of gla- 

 bellar furrows are indicated by smooth lines ; anterior and posterior 

 very obscure. Neck segment narrow, well defined from the glabella 

 by being slightly depressed ; a minute tubercle occurs upon ihe ante- 

 rior central third. 



