110 PROCEEDINGS OP THE ACADEMY OP 



Dr. Leidy stated that, in company with Messrs. Vaux, Sergeant, Powel and 

 Tilghman, he had the day before visited the vicinity of Phoenixville, Chester 

 Co., with the view of examining the shales recently removed in widening the 

 rail-way tunnel. The specimens of shales or black slates, supposed to be of 

 triassic age, presented this evening to the Academy, are those which had been 

 collected. Besides obscure vegetable remains, species of Cypridae and Posido- 

 niae, they contain scales, bones and teeth of ganoid fishes, and also teeth of 

 three apparently distinct genera of reptiles. Two of the teeth, elongated coni- 

 cal in form, and finely striated, appear to belong to the genus Clepsysaurus, 

 Lea, the remains of which were first discovered in the corresponding rocks of 

 Lehigh Co. A third tooth, of large size, is compressed conical, and has oppo- 

 site, acute, serrulated borders. It probably indicates a new genus and species, 

 for which the name Eurydorus serridens is proposed. Fragments of similar 

 teeth have been found in the rocks near Gwynned, Montgomery Co. A fourth 

 tooth, much smaller than the one just indicated, has the same form, but has 

 its borders without serrulation, and has the base fluted. It resembles the 

 teeth of Couipsosaurus, of the coal of Chatham Co., North Carolina, but, 

 nevertheless, belongs to a different species. 



The death of Mr. W. I. Broderip, of London, late a correspondent of 

 the Academy was announced. 



On leave granted, a vote of thanks, was ordered to be tendered to Dr. 

 Alexander Bryant, for his donation of fossils, received this evening. 



April 12th. 



Mr. Lea, President, in the Chair. 

 Fifty-four members present. 



Dr. Leidy stated that the specimens of ferruginous rock containing remains 

 of fishes, presented to the Academy this evening by Dr. P. W. Mosblech, of 

 Bethany, Virginia, were of a very interesting character. Dr. Mosblech, in a let- 

 ter, states that the locality of the remains is a horizontal, ferruginous deposit, 

 about one inch in thickness, resting upon an old vegetable soil, overlying a 

 limestone which is considered as the uppermost member of the coal forma- 

 tion ; and it is covered with a soft, sandy, aluminous shale, destitute of or- 

 ganic remains, so far as examined. The extent of the ferruginous deposit is 

 unknown, but it seems to be confined to the College Hill, at Bethany, equal to 

 about four acres. 



The fragments of rock contain a multitude of isolated scales of ganoid fishes, 

 and numerous teeth and small fragments of bones. Most of the teeth are of 

 small size, and have exactly the same form and construction as those of 

 Saurichthys, a genus of the triassic formations of Europe; but others of 

 large size belong to the genus Diplodus, which is also found in the coal 

 formations of other parts of the United States, and of Europe. 



Dr. Leidy added that the fossils from the Green Sand, of Monmouth Co., pre- 

 sented this evening by Mr. J. H. Slack, consisted of fragments of jaws with 

 teeth of Mosas aurus, several bones apparently of a reptile, of unknown 

 character, a jaw of Enchodus, a palate bone with teeth of Pycnodu s , 

 and teeth of 1 o d u s and Galeocerdo. 



The Commitfee on Proceedings laid on the table the number of 

 the Proceedings for March. 



[April, 



