24G Organic Remains of the FerrugiJious 



fior sulcus- Found with the preceding species in the calcareous 

 beds of New Jersey. Communicated by Mr. T. R. Peale. 



The species of ananchytes embraced in the former part of this pa- 

 per is very different from either of these : I have since given it the 

 name of •^. cinctus, 



ZOOPHYTES. 



ALVEOLITES. Lam. 



A species occurs in the calcareous beds very similar to A. glome^ 

 ratus of Say, a recent zoophyte common on our coast, 



BONES. 



SAURODON. Hays. 



S. Leanus. (Hays,) Portions of the jaw of an extinct Saurian 

 have been described under this name by Dr. Hays, in a memoir 

 read before the American Philosophical Society, but not yet publish- 

 ed. These remains are said to be nearly allied to the genus Sauro- 

 cejphalus of Dr. Harlan,* brought originally from Missouri, by Messrs. 

 Lewis and Clarke. The saurodon was discovered in the Marl at 



r 



Woodbury, New Jersey. 



MOSASAURUS. 



^In the former part of this paper I mentioned the remains of this 

 animal with a question, arising from the positive assertion of M. de 

 Blainville that the teeth attributed in this country to the Maestricht 

 animal were those of the Ichthyosaurus. In a late number of thef 

 annals of the New York Lyceum, Dr. De Kay has carefully inves- 

 tigated this subject, and expresses his unequivocal conviction that these 

 relics are really those of the Mosasaurus^ and not, as the French 

 naturalist asserts, of the Ichthyosaurus. I have no hesitation in adop- 

 ting Dr. De Kay's opinion. 



GEosAURUs, Cuvier. 



In the memoir just mentioned Dr. De Kay also announces the dis- 

 covery, in New Jersey, of some dental remains of the Geosaurus, a 



subgenus of the Mosasaurus. 



Remarhs. 



The Lignites of our ferruginous sand are exclusively Dicotyled- 

 onous, (Exogenite^ of M- Brongniart.) In some fare instances the 



Jour. Acad. Nat. Sc. Vol. IV. t Vol. III. 



