[ 237 ] 170 



Ammonites placenta, (De Kay.) Very large ; found also in New Jersey. 



Ammonites Mandanensis, (Morton.) 



Ammonites Nicolletii, (Morton.) 



Ammofiites abysshins, (Morton.) 



Aminonites Conradi, (Morton.) Also found in Alabama. 



Baculites ovatus, (Say.) Also found in Alabama. 



Bacidites compressus, the same species flattened, 



Belemnites mucronatus; found in New Jersey and Alabama, and also oc- 

 curs in the chalk of England. 



Hipfomjx horealisi (Morton.) 



Avictda cretacea, (Conrad.)* 



Cyllierea Missouriana, (Morton.) 



I'elli7ia occidentalism (Morton.) 



Ostrua vesicularis, (Lamarck.) 



Anomia tellinoides, (Morton.) 



Jnoceramus harahini, (Morton.) Occurring in great numbers, and of un- 

 usually large size ; most frequently compressed. This species ap- 

 proaches 1. Crispii of Mantell, figured in his Geology of Sussex, and 

 characterizes the formation. 



VERTEBRATED ANIMALS. 



Two vertebrca of a species of squalus. 



Three vertebrce of a nondescript crocodile. 



Two vertebrce continuous of an animal belonging to the order of enalis 

 saiirus of Conybeare, The specimens are completely rpineralized, 

 the organized structure being entirely replaced by crystallized carbonate 

 of lime. From the size of the specimens, and their other characters, 

 it is quite probable that these vertebra? form a part of the skeleton of 

 the saurocephalus lanciformis, (Harlan.) Vide Medical and Physical 

 Researches, pp. 362 and 386. These specimens are considerably dis- 

 torted by pressure, and similar ones have been found in the green sand 

 of New Jersey, and in the chalk formation of England. 



♦ This is a fragment of a cast, but sufficiently distinct to entitle it to a specific appellation. 

 It is remarkable for the perfectly rectilinear front^margin, so far as it appears on the iragmenl. 



A D 7.5. 5? 



