1868.] MEETING OF THE AMERICAN ASSOCIATION. 299 



alternated with (passing between) the divergent incisors of the 

 upper jaw. Back of this terminal tooth, on some specimens, was 

 another triangular summit, behind which was a row of small teeth 

 corresponding to those of the mamillaries. Such was the power 

 of this tremendous dental apparatus, that the bodies of our 

 largest living fishes would be instantly pierced and crushed by it, 

 if exposed to its action. Behind the head were large and thick 

 plates, one of which corresponded to the " os medium dorsi" of 

 ffeterostius (of Pander) being at least of equal size. 



These interesting fossils were found in the calcareous 

 concretions, which occur so abundantly near the base of the 

 "Black Shale" (Hamilton) at Delaware, in Central Ohio, by 

 Mr. Herzer, a clergyman, who, while performing his pastoral 

 duties, and living on a very small salary, had been a most zealous 

 and remarkably successful student of the local geology. 



On some Fossil Reptiles and Fishes from the Carbon- 

 iferous Strata of Ohio, Kentucky, and Illinois; by J. S. 

 Newberry. — The specimens exhibited and described in this 

 communication consisted of reptiles and fishes from the cannel 

 stratum underlying the main coal seam at Linton, Ohio ; of fishes 

 from the coal measures of Illinois, collected by the State 

 Geologist; and of a group of fishes collected by Dr. Patterson 

 from a stratum of bituminous shale lying in the Waverly group, 

 125 feet above its base at Vanceburg, Kentucky. Of these, the 

 first series included Raniceps Lycllii (Wyman) with several as yet 

 undescribed reptiles, some of which apparently belong to Prof. 

 Huxley's new genera, OpJiiderpeton and Urocordylus. Associated 

 with these were some twenty species of fossil fishes, most of which 

 have been described by Dr. Newberry, but were now represented 

 by new and more perfect specimens. Among these were eight 

 species of Eurylepis, a genus created by Dr. Newberry to receive 

 a group of small lepidoids, allied to Palceoniscus, but distinguished 

 by the scales of the sides, which are much higher than long. The 

 scales on several of these species are very highly ornamented. 

 The specimens exhibited were preserved in cannel coal, and 

 covered with a film of sulphide of iron, by which they were 

 brilliantly gilded. With these were two species of Coelacanthxs, 

 some of the specimens of which showed that the fishes of this 

 genus were furnished with a supplemental caudal fin, as in 

 Undina. This, Dr. Newberry stated, was an interesting fact, 

 confirmatory of Prof. Huxley's view of the relations of Undina, 



