412 INDEX GENERUM MAMMALIUM. 
Merycodus—Continued. 
Merycodus: “pve, urpvkos, ruminant; ddo0vs, tooth—in allusion to the lower 
premolar and molar, which were believed to represent ‘a small ruminant 
allied to the musks.’ 
Merycoidodon Leipy, 1848. Ungulata, Artiodactyla, Agriochceridee. 
Proc. Acad. Nat. Sci. Phila., 1848, 47-50, plate; Hay, Science, new ser., IX, 594, 
Apr. 21, 1899 (name revived); Cat. Foss. Vert. N. Am., Bull. 179, U. S. Geol. 
Sury., 665-666, 1902. 
Merycodon MAnscHALL, Nomenclator Zool., Mamm., 8, 1873 (misprint). 
Type: Merycoidodon culbertsonii Leidy, from the Oligocene of the Bad Lands of 
White River, South Dakota. 
Extinct. Based on two fragments of jaws. 
Merycoidodon: enpvé, upvios, ruminant; €7d0s, form; d6@v=<ddo0vs, tooth—in 
allusion to the ruminant pattern of the crowns of the molars. 
Merycopater Corr, 1879. Ungulata, Artiodactyla, Agriochceridee. 
Am. Naturalist, XIII, 197, Mar., 1879. 
Menycopater Scudder, Nomenclator Zool., pt. 1, 207, 1882 (misprint). 
Type: Hyopotamus guyotianus Cope, from the Miocene (John Day) of Oregon. 
Extinct. Based on ‘‘a portion of the left mandibular ramus, in which only the 
last molar is sufficiently well preserved for identification." (Palzeont. Bull. 
No. 30, p. 16, Dec. 3, 1878.) 
Merycopater: yonpvs, unpvkoc, ruminant; zar»p, father—i. e., an ancestral 
ruminant. 
Merycopotamus FarcoxER & CavTLEY, 1845. Ungulata, Anthracotheriide. 
FaALCONER & CauTLey, in Owen’s Odontography, pt. 111, 566-567, pl. 140, fig. 8, 
1845 (species not mentioned). LypeKKER, Cat. Foss. Mamm. Brit. Mus., II, 
209-215, figs. 27-28, 1885. 
Type: Hippopotamus dissimilis Falconer & Cautley, from the Siwalik Hil!s, India. 
2xtinct. 
Merycopotamus: “pve, unpvkos, ruminant; zórcajos, river. 
Merycotherium Boj4Nvs, 1824. Ungulata, Artiodactyla, Camelidze. 
Férussae’s Bull. Sci. Nat., Paris, III, 226-228, 1824 (abstract by Desmarest); 
Nova Acta Acad. Czes.-Leop. Carol., XII, 265-279, pl. xxr, figs. 1-8, 1825. 
Type: Merycotherium sibiricum Bojanus, from Siberia. 
Extinct. 
Merycotherium: u9pv&, unpv«os, ruminant; 6npíov, wild beast. 
Mesacodon Marsn, 1872. Glires, Proglires, Mixodectidee. 
Am. Journ: Sci. & Arts, 3d ser., IV, 212, Sept., 1872 (sep. issued Aug. 13); 
OsBonN, Bull. Am. Mus. Nat. Hist., N. Y., XVI, 212, June 28, 1902 (order). 
Type: Mesacodon speciosus Marsh, from the Eocene of Grizzly Buttes, near Fort 
Bridger, Wyoming. 
Extinct. Based on ‘‘a nearly perfect lower jaw, with most of the teeth in good 
preservation." 
Mesacodon: 4éGos, middle; d», point; 66@v=6d6ovs, tooth. 
Mesembriotherium Moreno, 1882. Ungulata, Astrapotheroidea, Astrapotheriide. 
" Patagonia, Resto de un Continente hoy sumergido, 20, 1882" (fide AmE- 
GHINO); AMEGHINO, Act. Acad. Nac. Cien., Córdoba, VI, 622, 1889. 
Type Mesembriotherium broce Moreno, from the headwaters of the Rio Santa 
Cruz, Patagonia. 
Extinct. Based on part ofa skull. The same specimen was described by Bur- 
meister, in 1879, under the name Astrapotherium patagonicum. 
Mesembriotherium: “e6nuBpia, midday, south; §yptov, wild beast—in allusion 
to the type locality in the far south. 
