I 



New Species of Paleozoic Fossils. 187 



which bears some resemblance to /. armatus Hall, 20th Report State 

 Cabinet, p. 330, pi. 22, figs. 1-3, in the general form of the glabella and 

 pygidinm, and also in the large prominent eyes. The posterior angles 

 of the movable cheeks are, however, extended obliquely backward 

 and outward, into long, curved spines of considerable strength, pro- 

 jecting at an angle of forty-five degrees to the axis of the body, 

 instead of being directed exactly backwards, as are the short spines 

 of that species. The facial suture does not curve outward in front 

 of the eye, as in that species, and is more rounded in front, giving to 

 this part of the glabella a narrower form and a greater anterior 

 breadth and extent to the movable' cheek. In the form of glabella 

 and spines, it is so entirely distinct from any other species described, 

 that it cannot easily be mistaken. 



Formation and locality. In limestone of ^Niagara age, at the Falls 

 of the Ohio. From the cabinet of Dr. James Knapp. 



Devonian Species. 



DisciNA (Orbiculoidea ?) GRANDis Ya7iuxem. 



This species, presenting all the characteristic features of tlie same 

 in the Hamilton Group of New York, occurs in the Hydraulic beds 

 of the upper limestones, at the Falls of the Ohio. In a single speci- 

 men preserving both valves, the ventral valve measures one inch 

 and four-tenths in its longest diameter. A single ventral valve of 

 the same is slightly larger, and a separate dorsal valve measures one 

 inch and three-tenths, with an elevation of about half an inch ; in this 

 one the apex is slightly turned to one side, as in all well preserved 

 specimens from the Hamilton group. 



The specimens are from the cabinet of Dr. James Knapp, of Louis- 

 ville, and were obtained from the upper limestones at the Falls of the 

 Ohio. 



DisciNA (Teematis) trunoata Hall. 



This species, possessing all the characters of the same in the Gene- 

 see slate of New York, occurs in great numbers in the black slate, 

 near the Falls of the Ohio. The shell is somewhat thicker than is 

 usual in New York, but differs in no important character. 



From the cabinet of Dr. James Knapp, of Louisville, Kentucky. 



Crania Bordeni n. sp. 



Shell depressed conical, about half as high as wide ; beak subcen- 

 traL slightly nearer the anterior end. Surface marked by fine radi- 

 ating striae, and somewhat strong lines of growth, giving a rugose 

 character to the surface, especially toward the margin. 



A similar form from the Hamilton group of New York, C. cre- 

 nistriata., is much more coarsely striated. 



Formation and locality. Adhering to Sjpirifera Oweni, Devonian 

 limestone, from McCoy's quarry, Clarke county, Indiana. From W. 

 W. Borden, New Providence, Indiana. 



