90 PROCEEDINGS OP THE ACADEMY OF 



PINNIPEDIA. 



yO. ISCHTROTHERIUM ANTIQUUM, L. : Pr. A. N. S. Tlii. 89. • 



CARNIVORA. 



31. Hyaenodon horridus, L. : Pr. A. N. S. vi. 393. 



32. Hyaenodon cruentus, L. : Ibid. 



33. Hyaenodon crucians, L. : Ibid. 



34. Amphicyon vetus, L. : Ibid. vii. 151. Syn. Daphcenus veins. 



35. Amphicyon gracilis, L. : Ibid. viii. 90. 



36. Machairodus primaevus, L. and Owea : Anc. F. Neb. 95. 



37. Deinictis pelina, L. : Pr. A. N. S. vii. 121 ; viii. 91. 



38. Leptarctus primus, L. : Ibid. viii. 311. 



II. REPTILIA. 



CHELONIA. 



39. Testudo nebrascensis, L. : Anc. F. Neb. 103. Syn. Stylemys nebrascensis, 

 ?Emys seu Testudo kemispherica, Oweni, Culbertsonii, et lata. 



40. Trionyx foveatus, L. : Pr. A. N. Sc viii. 13, 312. 



41. CoMPSEMYS viCTUs, L. : Ibid, 312. 



42. Emys obscurus, L. : Ibid. 



SAURIA. 



43. MososAURUS MissouRiENSis, Leidy. Syn. Ichthyosaurus missouriensis, Harlan ; 

 Mososaurtcs Maximiliani, Goldfuss ; etc. 



44. Megalosaurus ? (Deinodon) horridus, L. : Pr. A. N. S. viii. 12. 



45. Palaeoscincus costatus, L. : Ibid. 



46. Trachodon mirabilis, L. : Ibid. 



47. Troodon formosus, L. : Ibid. 



48. ?Crocodilus humilis, L. : Ibid. 73. 



49. Thespesius occidentalis, L. : Ibid. 311. 



III. PISCES. 



50. Clupea hcmilis, L.: Pr. A. N. S. viii. 256. 



51. Cladocyclus occidentalis, L. : Ibid. 



52. Enchodus Shumardi, L. : Ibid. 



53. Saurocephalus lanciformis, Harlan : Jour. Ac. Nat. Sc. iii. 337 ; Med. k 



Phys. Res. 362. 



54. Lepidotus occidentalis, L.: Pr. A. N. S. viii. 73. 



55. Lepidotus Haydeni, L. : Ibid. 



56. Mylognathus PRiscus, L. : Ibid. 312. 



Of tlie above list of vertebrate remains tliose of Mososaurus, Cladocyclus, En- 

 chodus, and Saurocephalus were obtained from deposits of tlie cretaceous period. 



The remains of Deinodon, Palccoscincus, Trachodon, Troodon, ?Crocodilus, and 

 Lepidotus, were discovered by Dr. F. V. Ilayden, in a deposit, on the Judith River, 

 which I have suspected to be of equivalent age with the Wealden formation of 

 Europe. 



The remains of Compsemys, Emys, and Mylognathus, were found at Long Lake, 

 Nebraska, together with those of Trionyx, the same species of which appears 

 also to be common to the deposit just mentioned of the Judith River. 



Oreodon, Ayriochccrus, PcubrotUeriumj Lcptomeryx, Leptauchenia, Froiomeryx, 



[March, 



