246 Organic Remains of the Ferruginous 



rior 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 A. 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- 

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

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

 Woodbury, New Jersey. 



MOSASAUKUS. 



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. 



Remarks. 



The Lignites of our ferruginous sand are exclusively Dicotyled- 

 onous, (Exogenites of M. Brongniart.) In some rare instances the 



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



