438 INDEX GENERUM MAMMALIUM. 
Mylodon (subgenus of Megalonyx) OwEN, 1840. Edentata, Megatheriide. 
Zool. Voy. H. M. S. ‘Beagle,’ pt. 1, Foss. Mamm., 63-73, pls. xvi figs. 3-5, 
xvn xix, xxvi figs. 3-6, 1840; Encyclopedia Britannica, 8th ed., XVII, 
173, 1859 (aired to generic rank); LypDEKKER, Cat. Foss. Mamm. Brit. Mus., 
V, 106, 1887 (type fixed). 
Species: Mylodon harlani Owen (type), from Big Bone Lick, Kentucky; and M. 
darwinii Owen, from Punta Alta, Bahia Blanca, northern Patagonia. 
Extinct. 
Mylodon: uvÀAó8 ove, grinder, molar (from 4/047, mill; ó0 cov — 0 ovs, tooth). 
Myloglyptodon Amrcuino, 1884. Edentata, Glyptodontidee. 
Filogenia, p. xlvi, 1884. 
Provisional name for the genus described as Thoracophorus by Gervais & Ameghino, 
in 1880, from Argentina. 
* Una forma intermediaria que una el Mylodon con el Dedicurus. Yo habia 
adivinado su existencia por inducción hace aiios y le había aplicado proviso- 
riamente el nombre de Myloglyptodon. . . . Actualmente el animal es cono- 
cido con el nombre de Thoracophorus.’? | ( AMEGHINO.) 
Antedates Neothoracophorus Ameghino, 1889. 
Extinct. 
Myloglyptodon: A9, molar; +-Glyptodon. 
Mylohyus Corr, 1889. Ungulata, Artiodactyla, Tayassuide. 
Am. Naturalist, X XIII, 134, Mar., 1889; Journ. Acad. Nat. Sci. Phila., 2d ser., 
XI, pt. 2, pp. 259-263, pl. xx1, a 3-3b, 1899. 
Type: Dicotyles nasutus Leidy, fo the Pleistocene of Gibson County, Indiana. 
Extinct. 
Mylohyus: evan, molar; Us, 00s, hog. 
Mynomes RariNEsQUE, 1817. Glires, Muridee, Microtinee. 
Am. Monthly Mag., II, No. 1, p. 45, 1817; MrztEer, N. Am. Fauna, No. 12, pp. 
15, 62, July 23, 1896 (in synonymy). 
Myonotes Gray, in Griffith’s Cuvier, Animal Kingdom, V, 214, 1827. 
Myonomes Cours, Proc. Acad. Nat. Sci. Phila., 1874, 189. 
Myonomus Cours, Mon. N. Am. Rodentia, i900 1877 (emendation). 
Myxomes RoaER, Bericht Naturwiss. Ver. Schwaben und. Neuburg (a. V.) in 
Augsburg, XXIX, 103, 1887 (misprint). 
Type: Mynomes pratensis Rafinesque (= Arvicola pennsylvanicus Ord), from the 
vicinity of Philadelphia, Pennsylvania. : 
Mynomes:* (0s, pvóc, mouse; vos), pasture (formed in analogy with Mygale). 
“The name means pasture mouse" (Rafinesque). The designation ‘pasture 
mouse’ is also suggested by the specific name pratensis. 
Myocastor (subgenus of Mus) Kerr, 1792. Glires, Octodontidee. 
Animal Kingdom, I, Mamm., Syst. Cat. Nos. 458-521 (full genus), 225-226, 1792; 
ALLEN, Bull Am. Mus. Nat. Hist., VII, 181, 182-183, June 19, 1895 (type 
fixed). 
Species: Mus Myocastor coypus Molina (type), from Chile; and Mus Myocastor 
zibethicus Gmelin, from eastern Canada. 
Antedates Myopotamus Geoffroy, 1805. 
Myocastor: pots, uvóc; mouse; + Castor. 
Myocebus ('LzssoN') WaaxER, 1841. Primates, Lemuride. 
WaaNER, Wiegmann’s Archiv Naturgesch., 1841, II, 19; ScuiNz, Syn. Mamm., 
I, 105, 1844. 

us «T do not know TU if any, meaning attaches to this word, but suppose it to be 
compounded with js, so that it should be spelled Myonomes, if not further altered 
into Myonomus.’’ (Cougs, l. c., 1877.) 
