NATURAL 8CIENCES OF PHILADELPHIA. 73 



Heersien, whilst Lyell found, in the Belgium Lower Landenien grey marl, a 

 perfect specimen of the Terebratulina gracilis, a well known chalk fossil, 

 together with Ostrea (Exogyra) lateralis, N.vst. Lyell remarks, that the 

 Lower Landenien, at Folx les Caves, rests on the Maestrich chalk. 



There is an extensive bed of lignite in Europe of eocene age, which Des- 

 hayes says forms a well-determined horizon with the long series of " sables in- 

 ferieures." " Above the lignite appears a bed of fresh-water and marine shells, 

 the horizon of which I believe to be the same as the lignite formation of the 

 United States. They reveal a singular state of the globe at the commencement 

 of the tertiary period, presenting a vast level region covered by a dense forest, 

 in which palms and oaks grew side by side, interspersed with lakes and 

 rivers and long shallow bays of salt water penetrating to the interior of the 

 continents. This state of the globe was exhibited in Europe and America at 

 the same time, and the land was little elevated above the sea level, except 

 that in America the Appalachian and Rocky mountain ranges stood out from 

 the vast plain. 



The Shark River fossils are few in number of species, and generally im- 

 perfect casts, with small chalky portions of the shell occasionally remaining. 

 A few of the bivalves have connected valves. About twenty-five species of 

 shells and plants have been collected, of which I think six shells are identi- 

 cal with species of the London Clay and one of the Plastic Clay, Cyprina 

 Morrisii. 



Catalogue of Shells of Shark R.'ver, 



Mactra . Aturia ziczac, Sowerby. 



Cyprina Morrissii. Nautilus Lamarckii, Desk. 



Dione . Priscofusus , Con. 



Yoldia protexta, C. Volutilithes mutata, Desk. 



Axinaea Surculi annosa, Con. 



Crassatella Sycotopus Smithii, Sowerby. 



Venericardia perantiquua Con. Onustus extensus, Sowerby. 



Avicula annosa, Con. Hippochrenes columbaria ? Defrance. 



Pinna . Acteonema prisca, Con. 



Pecten . Architectonica . 



Ostrea . Pleurotomaria perlata, Con. 



Fish. 

 Ccelorhynchus rectus, Agassiz. 



Catalogue of the EOCENE ANNULATA, FORAMINIFERA* ECHINODEBMATA 

 and CIRRIPEDIA of the United States. 



BY T. A. CONRAD. 



Annulata. 



SERPULA, Lin. 



S. ornata, Lea, Cont. to Geol. 37, 1, 5. Claib. 

 S. squamulosa, C. J. A. N. S., vii, 149. Claib. 



SPIRORBIS, Daudin. 



S. tubanella, Lea, Cont. to Geol. 36, 1, 4. Claib. 



DITRUPA, Berkeley. 

 D. subcoarctata, Gabb., J. A. N. S., 2d series, 386, 67, 47. Texas. 



Foramwfera. 



TRILOCULINA, D'Orbigny. 

 U. lineata, C, n. s. 



1865.] 



