Wue&qphaa Jacksoni. Briggsand Foster: Oariad. Nat. and Geol. L863, L35, 147. 

 Euelepha8 Columbi. Falconer: Palseont. Mem. 1868, 11,211 to 234. 

 ElepMs. Von Meyer: Palaeontographica, 1807, 70, Plate VII, Figs. 7, 8. 



See page 238. Remains noticed from New Mexico and Texas. 



MASTODON. 



Mastodon americanus. 



Leidy : Pr. Ac. Nat. Sc. 1868, 175. For synonymy, see Extinct Mammalia of 

 North America 18G9, 392. 



Some remains described or noticed page 237, and represented in Figs. 5, 



6, Plate XXII, and Fig. 9, Plate XXVIII. 

 Remains of the common American mastodon are found in the Quaternary 



formation throughout the United States. 



Mastodon mirificus. 



Leidy: Pr. Ac. Nat. Sc. 1858, 10; 1870, 67; Ext. Mam. Fauna of Dakota and 



Nebraska 1869, 249, 396. 

 Mastodon {Tetralophodon) mirificus. Leidy: Pr. Ac. Nat. Sc. 1858, 10.' 



Remains originally described from the Pliocene of the Loup Fork of Platte 

 River. Also reported to occur on the Niobrara River, Nebraska. No- 

 ticed page 237. From the Pliocene of Sinker Creek, Idaho. 



Mastodon obscurus. 



Leidy : Ext. Mam. N. America 1869, 396. For earlier synonymy, see the same 



work. Pr. Ac. Nat. Sc. 1870, 99; 1871, 199; 1872, 142. 

 Mastodon Shepardi. Leidy : Pr. Ac. Nat. Sc. 1870, 98 ; 1S71, 199. 

 Rhynchotherium f See Falconer : Palseontological Memoirs, 1868, II, 74. 



Originally named from remains found in Maryland, North Carolina, and 



Georgia. See Extinct Mammalian Fauna of Dakota and Nebraska, 



1869, 244, 396. Remains from California and New Mexico described 



page 231 and represented in Figs. 1 to 4, Plate XXI and Figs. 1 to 4, 



Plate XXII, of the present work, are supposed in whole or part to 



belong to the same species. If they do not, they would represent 



another species, which might retain the name of M. Shepardi. 



In the Palseontographica for 1867, page 64, Von Meyer has given a 



description of the right ramus of the lower jaw of a Mastodon, from 



Mechoacan, Mexico. The specimen is represented in Plate VI of the 



same work, and it contains the last molar and the one in advance, 



both entire. The portion of the last molar tooth in the jaw-fragment 



