1910.] NATURAL SCIENCES OF PHILADELPHIA. 663 



The other specimen was collected from the Marcellus shale of 

 Richfield, N. Y., by the late Prof. C. E. Beecher. It forms part of 

 the Newberry Collection at the American Museum of Natural History. 

 Newberry was fully aware of the nature of the fossil, for he refers to 

 Acanthodian remains very briefly on page 61 of his monograph as 

 having been collected by Beecher from this horizon. Subsequent 

 authors have not mentioned it. This Richfield specimen displays a 

 spine, numerous scales and an undetermined plate. The fossil lies 

 in a bedding plane of the thinly laminated shale in such a way that 

 when the block was broken a portion of the fish adhered to the rock 

 on either side. An examination of the spine indicates that the Rich- 

 field and Kimber Springs specimens are specifically identical. The 

 spine, though less perfectly preserved, exhibits the same proportions, 

 curve and longitudinal ridges. When complete it must have been 

 over 33 mm. in length. The scales are relatively large, four-sided and 

 apparently unsculptured. The specimen is of good size for an Acan- 

 thodian, and though any estimate of its length must be very rough, 

 we are undoubtedly justified in assuming that the complete fish was 

 at least 175 mm. long. 



Though Acanthodian remains have been reported from the Lower 

 and Upper Devonian of the Atlantic Border province and from the 

 Upper Devonian of the New York province, these specimens represent 

 the earliest examples of undoubted Acanthodians which have been 

 found in the latter region. 



In the Atlantic Border province the following forms have been 

 reported: 13 Acanthodes semistriatus Woodward, Cheiracanthus cos- 

 tellatus Traquair, Climatius latispinosus (Whiteaves) from the Lower 

 Devonian of Campbellton, N. B., and Diplacanthus striatus Ag., 

 D. horridus Woodward, Acanthodes a/finis Whiteaves, A. concinnus 

 Whiteaves from the Upper Devonian of Scaumenac Bay, Quebec. 



In the New York province we have: Acanthodes (?) prist is Clarke, 

 Rhinestreet shale, Upper Devonian, near Sparta, N. Y. An unnamed 

 Acanthodian, Marcellus shale, Middle Devonian, Richfield, N. Y., 

 and Kimber Springs, near Onondaga Valley, N. Y. 



13 C. R. Eastman, New York State Mus. Mem. 10, pp. 13, 16, 17. Also O. P. 

 Hay, U. S. G. S., Bull. 179, pp. 273, 274. 



43 



