478 



MESOZOIC TIME^-REPTILIAN AGE. 



narrow, as in fig. 465, page 277. Figs. 773, 773 a, different views of a tooth 

 of Ptychodus Mortoni (Cestraciont), a species found in New Jersey. 



(b.) Reptiles. — Jlosasaurus Jlaximiliani Goldfuss, from New Jersey, a species 

 24 feet long : a fine specimen of the cranium is in the Museum at Bonn in 

 Prussia. Fig. 774, Crocodilus clavirostris Morton, from New Jersey : whole 



Fig. 774. 



Crocodilus clavirostris ( X V& )• 



length of skull (in specimen) 23 inches, greatest hreadth 12£ inches. Owen 

 has named two other New Jersey Crocodiles, C. basifissus and C. basitruncatus. 

 Remains of the Gfeosaur, according to Morton, occur in New Jersey; also bones 

 of Turtles. 



(c.) Mammals. — None. The species of Priscodelpkinus Leidy, from New Jer- 

 sey, supposed to be Cretaceous, are now known to be Tertiary. 



III. Fossils characteristic of the Subdivisions of the Creta- 

 ceous. 



A. Earlier Cretaceous. — No. 1 (Dakota group). Upper Missouri: Pha- 

 rella? Dahotensis, Axinsea Siouxensis, Cyprina arenaria, Leaves of Angio- 

 8perms. Alabama: Ceratites? Americanus Harper, Leaves of Angiosp>erm8. 

 New Jersey : Leaves of Angiosperms. 



No. 2 (Benton group). Upper Missouri: Inoceramus problematicus, I. um- 

 bonatus, Ostrea congesta, Pholadomya papyracea, Ammonites percarinatus, A. 

 vespertinus Morton ( = A. Texanus Roemer), Scajrfiites larvseformis. Texas: 

 Ammonites percarinatus, Inoceramus Capulus. New Jersey : none. 



No. 3 (Niobrara group). Upper Missouri: Ostrea congesta, Inoceramus pro- 

 blematicus, I. aviculoides, I. pseudo-mytiloides. Arkansas : Toxaster elegans, 

 Eolaster simplex, Cardium multistriatum, Inoceramus problematicus, I. confertim- 

 annulatus, Gryphxa Pitcheri. Texas: Holaster sinqjlex, Epiaster elegans, Cidaris 

 hemigranosus, Grypltiea Pitcheri, Ostrea subovata (0. Marshii Marcou), Inoceramus 

 problematicus, Turrilites Brazoemis, Ammonites Texanus, Hamites Fremonti. 

 New Jersey : none. 



