406 DESCRIPTIONS OF NEW SPECIES OF FOSSILS, 



List of Species common to the Cretaceous Formations of Nebraska and New Jersey. 



Nautilus Dekayii, Belemnites Americanus, 



Ammonites placenta, Inoceramus Barabini, 



" Conradii, at Prairie Bluff, Alabama, Ostrea larva. 



Baculites ovatus, 



List of New Species of Fossils described in the Preceding Paper. 



Lingula subspatulata, Natica obliquata, 



Caprinella coraloidea, " paludinseformis, 



Capulus occidentalis, Actseon concinnus, 



Avicula Haydeni, Buccinum vinculum, 



Pecten rigida, Fusus Shumardi, 



Lucina subundata, " constrictus, 



Cytherea orbiculata, " ? tenuilineata, 



" tenuis, Rostellaria fusiformis, 

 Crassatella Evansi, 



Pectunculus Siouxensis, Dentalium gracilis, 

 Nucula subnasuta, 



" ventricosa, Helix Leidyi, 



Inoceramus Conradi, Hamites Mortoni, 



" tenuilineatus, Ammonites complexus, 



" convexus, percarinatus, 



" sublsevis, Ancyloceras Nicolleti, 



" fragilis, Baculites grandis, 



Natica concinna, Callianassa Danai. 



Among all the collections made in Texas by Dr. Roemer and others, and of all 

 those brought by the Boundary Survey Expedition, and other surveying and exploring 

 parties, which we have seen, there is but a single species which we regard ds 

 doubtfully identical with one from Nebraska. This is the Inoceramus Barabini of 

 Morton (== I. Crispii, Mantell [?]). 



The most striking distinction between the fossils of the cretaceous formation of 

 Nebraska, and that of New Jersey and other parts of the United States, is the almost 

 total absence of Ostrea, only two small species being known in the Missouri region, 

 while Exogyra is quite unknown. 



The same region has not hitherto furnished a single Echinoderm in all the collec- 

 tions that have been made there during half a century. 



