271 



rather common. The large specimens noted by me as above, under L. Icevis, 

 probably belong here. 



Greensand, No. 4, of New Jersey. 



aa. Species with the dorsal centra depressed ; Nectoportheus^ Cope : 



Liodon validus, Cope. Plate XXXVII, fig. 4. 



Extinct Batrachia and Eeptilia of North America, 1870, p. S07. — Necloporlheus validus, Cope, 

 Proceedings of the Academy of Natural Sciences, Philadelphia, 18Gb, 181. — Mosasaurus, 

 Leidy, pro parte, Cretaceous Reptiles of the United States, 18G5, p. 74-75, Plate VII, 

 19-20, III, 1-2. 



Greeusand, No. 5, New Jersey. 

 Liodon miceomus, Marsh. 



Bhinosaurus micromus, Marsh, American Journal of Science and Arts, 1872, June, Table XIII, 

 figs. 1-2. 



Niobrara chalk of the Smoky Hill. 

 Liodon nep^olicus, Cope. Plate XXXV, figs. 11-13. 



Hayden's Bulletin of the United Sta es Geological Survey of the Territories, 1874, p. 37. 



Niobrara epoch of Kansas. 



Liodon PRORIGER, Cope. Plates XXVIII, figs. 8, 9 ; XXX, figs. 10-14; XXXVI, 



fig. 2 ; XXXVII, fig. 6. 



Transactions of the American Philosophical Society, Extinct Batrachia, otc, 1870, p. 202. — 

 Macrosaurus proriger, I. c, on Table XII, figs. 22-24. — Bhinosaurus proriger, Marsh, Amer- 

 ican Journal of Science and Arts, 1872, June. — Bhamphosaurus, Cope, Proceedings of 

 the Academy of Natural Sciences, 1872, p. 141. 



Niobrara chalk of the region of the Smoky Hill River, Kansas. 

 Liodon dyspelor, Cope. Plates XXVIII, figs. 1-7; XXIX-XXXIII. 



Proceedings of the American Philosophical Society, 1870, 574 ; /. c, 1871, December. — Bhino- 

 saurus dyspelor, Marsh, American Journal of Science and Arts, 1872, June. — Tylosaurus 

 dyspelor, Leidy, Report of the Geological Survey of the Territories, I, p. 271, Table 

 XXXV, figs. 1-11. 



Niobrara chalk of Fort McRae, New Mexico, and of Smoky Hill, Kansas. 

 Liodon sectorius, Cope. 



Proceedings of the American Philosophical Society, 1871, p. 41. 



Greensand, No". 5, of New Jersey. 

 aaa. Species of uncertain reference : 

 Liodon perlatus, Cope. 



Proceedings of the American Philosophical Society, 1870, p. 497. — Mosasaurus brumbyi, 

 " Gibbes," pro parte, Cope, Extinct Batrachia and Reptilia of North America, 1870, 

 p. 198. 



White limestone of Alabama. 



