270 



aaa. Sper.'ies hnown (diIij from icclli mid jiaiis of cvnnki : 

 MoaASAURUs ACUTiDENS, Gibbes. 



ffolcodus acuiidcns, Gibbcs, iiro jiarto, Smithsonian Coutiilmtious, 11, p. 0. 1'lati: III. figs. (i-O. 



? Mosasaurus minor, Giblx's, I. c, p. 7, Plato I, (igs. \i-'>, 1S51. 



CretaceuiLs of Alabama. 

 Mosasaurus copeanus, Marsh. 



American Jouraal of Science and Arts, 1869, 398; Cope, Extinct Batracljia and Reptilia of 

 North America, 1870, p. 198. 



Greeiisaud, No. 4, New Jersey. 

 Mosasaurus crassidens, Marsh. 



American Journal of Science and Arts, 1870, February .and JIareU ; Cope, E.xtinct Hatraehia 

 and Reptilia of Nortli America, 1K70, 108. 



Greensaiid of North Carolina. 

 aaaa. Species of loicertain reference : 

 Mosasaurus miersii, Marsh. 



American .Journal of .Science and Arts, ISG'J, :i95. 



Greensaiid below No. 5, New Jersey. 

 Mosasaurus bruimbyi, Gibbes. 



Cope, Extinct Batrachia and Reptilia of North America, I-'7(l, p. 198. — Amplioroslcus lUiituhiji, 

 Gibbes, Smithsonian Contributions, II, 1851, \k 9, Platen III, (Ijjs. 10-lG. 



Cretaceous of Alabama. 



LIODON, Owen. 



Proceedings of the British Association for the Advancement of Science, 1811, p. 141 ; Cope, Tr.ansactions 

 of the American Philosophical Society, Extinct Batrachia, etc., 1870, p. 200 ; I'roceedings of the 

 American Philosophical Society, 1871, December. 



a. Species with (he dorsal vertebral centra com])resscd ; Macrosaarus, 

 Owen : 



LiODON LiEVis, Owen. 



Macroaaui-us Iwvis, Owen, Journal of the Geological Society of London, 1819, iisO, plate. — 

 Liodon Iwvia, Cope, Extinct Batrachia ami IJepUlia of North America, 1870, 21)5 

 (exclusive of Lockwood's specimen). 



Grcensand, No. f, New Jersey. 

 LiODON MiTCiiiLLii, DeKay. 



Gcosaurus mikhiUU, DeKay, Annals of the Lyceum of New York, III, p. hlO.—Mosmsaiinis 

 mitchillii, pro parte, Leidy, Cretaceous Reptiles of I lie United States, p. O.'i, Plate XI, 

 figs. 1-4; Cope, Proceedings of the Boston Society of Natural History, 18G9.— /)n7;f(- 

 nodon biqmr, Leidy, Proceedings of the Academy of Philadelphia, 1850,25.') —Lfftlico- 

 dtts impai; Leidy, Geological Survey of North Carolina, p. 224, figs. 4.5-40, /r/c Leidy. 



This species is at least twice as large as the L. hcim, equaling the largest 

 . ol tlu; order. Much of the cranium remains uukiiown, but isolated teeth are 



