FISHES OF THE DEVONIAN SYSTEM. 



GANOIDEl. I 



FLA CODERMI 



Genus DINICHTHYS, Newb. 



SixcK t]ie publication of tlie first volume of this Report, a large amount 

 I if intoiestiiig material, illustrating the structure of this genus, has been 

 bnmglit to light. In this material is to be found nearly the entire bony 

 hivstem of one large individual, which gives us a more complete repre- 

 sentation of Z*/;?*V-Az'/i?/,9 than has yet been obtained of any of the larger 

 fossil fishes of the Old AVorld. These specimens we owe to the enthu- 

 siasm aud intelligence of Mr. Jay Terrell, who found them at his home 

 in Sheffield, Lorain Co. Here the upper portion of tlie Huron sliale 

 forms, along the Lake Shore, cliff's, which are being constantly worn away 

 by the waves. These cliffs have been Mr. Terrell's favorite hunting- 

 ground, and as the erosion of the surface revealed here and there the 

 projecting point of a bone, each indication has been followed up witli 

 care, aud the bone taken. out, perhaps in many fragments, but yet com- 

 plete in all its parts. Mr. Terrell has carefully preserved and unitetl 

 these fragments, and thus has been able to contribute to science some of 

 the most interesting and valuable palseontological material ever dis- 

 covered. Some months since, while scanning the cliffs neai' his house, 

 his attention Avas attracted to a bone of which only a small portion was 

 visible, the remainder being concealed in the rock. On taking this out, 

 othei's immediately associated with it were revealed, which were, how- 

 ever, so deeply buried, as to be inaccessible by ordinary means. In 

 these circumstances Mr. Terrell began operations on a shoulder of the 

 cliff immediately above, and excavated a space about twelve feet S(puire 

 down to the locality of the bones. Here he found the ventral shield, 

 before unknown, c[nite complete ; one perfect mandible, a " premaxil- 

 lary," and two '' maxillaries ; " a perfect dorsal shield, two feet in diam- 

 eter ; two scapulo-coracoids, with a large number of additional bones, 

 including the ossified rays of a large fin. From the same locality Mr. 

 Terrell had before obtained a cranium almost complete, and two Supra- 



