A SYNOPSIS, 



IN WHICH AN ATTEMPT IS MADE TO DEFINE MORE CLOSELY THE GENERA AND SPECIES OF 

 REPTILES WHOSE REMAINS ARE DESCRIBED IN THE PRECEDING PAGES. 



SAURIA. 



THORACOSAURUS. Leidy. 



1. Thoracosaurus neocesariensis. 



New Jerseij Gavial. DeKay: An. Lye. Nat. Hist. N. Y. 1833, III, 156, PL III, Fig. 1-10. 

 Gavialis neocesariensis. De Kay : Zool. New York, 1842, III, 28, PI. 22, Pig. 59. 

 Crocodilus s. Gavialis clavirostris. Morton : Pr. Ac. Nat. Sci. Phil. 1844, III, 82. 

 Crocodilus basifissus. Owen : Jour. Geol. Soc. Lond. 1849, Y, 381, PI. X, Figs. 1, 2. 

 Sphenosaurus. Agassiz : Pr. Ac. Nat. Sc. Pliil. 1849, lY, 169. 

 Thoracosaurus grandis. Leidy : Pr. Ac. Nat. Sc. Phil. 1852, YI, 35. 

 Pages 5-12, Plate I, Figures 1-6 ; Plate II, Figures 1-3 ; Plate III, Figures 5-11 



BOTTOSAURUS. Agassiz. 



2. Bottosaurus Harlani. 



Extinct species of Crocodile. Harlan : Jour. Ac. Nat. Sci. Phil. 1824, lY, 15, PI. I. 

 Crocodilus Harlani. Meyer: Palaeologica, 1832, 108. . , 



Crocodilus macrorhynchus. Harlan: Med. and Phys. Res. 1835, 369. 

 Bottosaurus. Agassiz: Pr. Ac. Nat. Sci. Phil. 1849, lY, 169. 

 Crocodilus hasitruncatus. Owen : Jour. Geol. Soc. Lond. 1849, Y, 380. 

 Pages 12-14, PI. lY, Figs. 19-21 ; PI. XYII, Figs. 11-14. 



CROCODILrS. 



3. Crocodilus tenebrosus. 



Page 14 : Two cervical, a dorsal, the sacral, and two caudal vertebrse, and portions of both humeri, 

 from Big Timber Creek, Gloucester Co., N. J. PI. Ill, Figs. 12-15. 



4. Crocodilus obscurus. 



Page 15 : Four vertebra;, the shaft of a femur, and four broken dermal bones, from Barnsboro, Glou- 

 cester Co., N. J., PI. II, Figs. 4, 5. 



Page 16, Two posterior dorsal or lumbar vertebrsB, from Arneytown, Bnrlington Co., N. J. 



( 115 ) 



