164 TRANSACTIONS OF THE [AUG. 15,. 



is peculiarly fitting that the New York Academy of Sciences 

 should bear a part in this movement, one which is so suitable in 

 itself, and which appeals so strongly to both scientific and local 

 pride in one of the greatest naturalists of our country. 



The President, Prof. .J, S. Newberry, read the following 

 paper: 



DESCRIPTION OF A NEW SPECIES OF TITANICHTHYS. 



(Illustrated with diagrams and drawings.) 

 (Abstract.) 



Some years ago, Mr. Jay Terrell found in the Cleveland shale 

 — base of the Carboniferous system — at Sheflield, 0., the cra- 

 nium of a very large fish allied to Dinichthys. Drawings of this 

 fish were exhibitedat the meeting of the American Association 

 in Montreal, in 1882, and it was subsequently described in the 

 Geological Magazine with the name of Titaniclithys Agassizii. 



Of this species, the cranium is somewhat triangular in out- 

 line, and four feet eight inches broad at the occiput. The 

 mandibles of this fish were long, slender rods, gently bent up- 

 ward at the anterior extremity, and there excavated in a deep 

 furrow, apparently for the reception of some kind of dental 

 organs. 



Kecently, Dr. William Clark, of Berea, 0., has found in the 

 banks of Rocky River, near his residence, a second and still 

 larger species of Titaniclithys, wliich I have named, from its 

 discoverer, T. Clarhii. Several skeletons, more or less com- 

 plete, were obtained by him, all of which have been kindly sub- 

 mitted to me for examination. From the more full and com- 

 plete description of these interesting remains, wliich I have 

 prepared for the U. S. Geological Survey, I take the following 

 brief notes. 



The cranium is broadly triangular in outline, five feet or more 

 between the posterior lateral angle?. It is concave behind, and 

 the central point of the arch is marked by a broad depression 

 similar to that in Dinichthys. The post-temporal plates are 

 articulated with the cranium as in Dinichthys, but by a 

 very different joint. In the last-mentioned genus, a conical 



