51 



* 



REPTILIA. 



LITERATURE OF THE SUBJECT. 



1834. Harlan, in Transactions of the American Philosophical Society, v. IV, 

 p. 405, pi. xx, figs. 3-8. Mosasaurus missuriensis. Snout de- 

 scribed. 



1845. Goldfuss, in Nova Acta Acad. K. L. C. Nat. Cur., XXI, p. 179, pis. vi, 

 vii, viii, ix. Mosasaurus maximiliam described (with malar arch) 

 (possibly remaining part of Harlan's specimen). 



1856. Leidy, in Proceedings of the Academy of Natural Sciences, Philadel- 

 phia, p. 89. Ischyrosaurus antiquus described. 

 Leidy, /. sup. c, p. 73 ; six species or* reptiles from the Fort Union beds 



of Judith River described. 

 Leidy, I. sup. c, p. 311. Hadrosaurus occidentalis and two tortoises 

 from the same beds described. 



1860. Leidy, Transactions of the American Philosophical Society, p. 145. All 

 the species of the Fort Union epoch redescribed and figured. 



1868. Cope, in Leconte's Notes on the Geology of the Extension of the Union 



Pacific Railroad, Eastern Division, on the Smoky Hill, p. 6^. 

 Elasmosaurus platyurus described. 



1869. Cope, in Proceedings of the Boston Society of Natural History, p. 250, 



January (separata). The order Pythonomorpha defined ; the num- 

 ber of cervical vertebras, structure of the posterior regions of the 

 cranium, of the lower jaw, scapular arch, and fore-limb first deter- 

 mined ; genus Platecarpus defined. 



Cope, in Proceedings of the American Philosophical Society, June. 

 Articulation of splenial bone in Pythonomorpha described ; genus 

 Polycotylus described. 



Cope, Transactions of "the American Philosophical Society. Part I of 

 Synopsis of Extinct Batrachia, Reptilia, and Aves of North Amer- 

 ica (to p. 104), issued in August. Elasmosaurus and Polycotylus 

 described and Reptilia of Fort Union epoch determined. 



1870. Cope, in Transactions of the American Philosophical Society, same 



work, part II (to p. 235), issued in April. Order Pythonomorpha 

 further described, its genera further defined, and Liodon proriger 

 described. 



