267 



V. Dorsal vertebra, and j'rontals unkown; bases of some dental crowns 

 swollen : 



Clidastes intermedius, Leidy. 



Proceedings of the Academy of Philadelphia, 1870 (January); Report on the United States 

 Geological Survey of the Territories, 1873, I, p. 281, Plate XXXIV, figs. 1-5. 



Rotten limestone, Pickens County, Alabama, "No. 4.'' 



SIRONECTES, Cope. 



Bulletin of the United States Geological Survey of the Territories, 1874, No. 2, p. 34. 



SlRONECTES ANGULIFERUS, Cope. Plates XXIII, figs. 10-18 ; XXIV, figs. 1-14. 

 L. a, p. 34. 



Niobrara Cretaceous of Kansas. 



PLATECARPUS, Cope. 



Extinct Batrachia and Reptilia of North America, 1870, pp. 185, 199 ; Proceedings of the Academy of Phila- 

 delphia, 1872, p. 141. — Holcodus, Cope, nee Gibbsii, Proceedings of the American Philosophical Soci- 

 ety, 1871, December. — Lestosaurus, Marsh, American Journal of Science and Arts, 1872 (June) ; (sep- 

 arata, p. 9). 



a. The stapedial pit inclosed between ridges : 



PLATECARPUS ICTERICUS, Cope. Plates XIV, fig. G ; XV, fig. 2 ; XXII, figs. 3, 4 ; 

 XVIII, fig. G ; XIX, fig. 9 ; XX. fig. 1 ; XXV ; XXXVI, fig. 7 ; XXXVII, fig. 8. 



Holcodus ictericus, Cope, Proceedings of the American Philosophical Society, 1870, 577, and 



1871, December. — Lestosaurus ictericus, Marsh, American Journal of Science and Arts, 



1872, June. 



Niobrara chalk of the Smoky Hill River. 



PLATECARPUS CORYPHAEUS, Cope. Plates XIV, fig. 3; XV, fig. 1; XVI, fig. 4;^ 

 XVII, fig. G; XX, fig. 4; XXI, figs. 1, 2; XXXVI, fig. G; XXXVII, fig. 0. 



Holcodus coryplueus, Cope, Proceedings of the American Philosophical Society, 1871, Decem- 

 ber. — Lestosaurus corypliwus, Marsh, I. c. 



Niobrara chalk of the Smoky Hill River. 



PLATECARPUS TYMPANITICUS, Cope. Plate XXXVII, fig. 11. 



Proceedings of the Boston Society of Natural History, 1869, p. 205 ; Extinct Batrachia and 

 Reptilia of North America, 1870, p. 2QJ>.— Holcodus acutidens, " Gibbes," Leidy, in part, 

 Cretaceous Reptiles of the United States, p. 118, Plate VII, 4-7; VIII, fig. 1-2-7; 

 XI, 14. 



Cretaceous, No. 1, of Mississippi. 



PLATECARPUS FELIX, Marsh. 



Lestosaurus fclix, Marsh, American Journal of Science and Arts, 1872, June, Table XIII, fig. 4. 



Niobrara chalk of the Smoky Hill River, Kansas. 



