MEDAT/EUS—MEGADONTOMYS. 403 
Medatzeus (see Madatzeus). Chiroptera, Phyllostomatide. 
Mediocricetus (subgenus of Cricetus) NEHRING, 1898. Glires, Muride, Cricetinze. 
Zool. Anzeiger, X XI, No. 567, p. 494 footnote, Sept. 5, 1898. 
Name suggested, but not used, for the subgenus of Cricetus, called Mesocricetus. 
* Man kónnte ja auch an ' Semicricetus" und ‘ Mediocricetus’ denken; aber diese 
Zusammensetzungen drücken nicht das aus, was ich ausdrücken will, wie 
denn überhaupt die lateinische Sprache in dieser Beziehung nicht genügt." 
Mediocricetus: Lat. medius, middle; + Cricetus—i. e., intermediate between Crice- 
tus and Cricetulus. 
Megacerops Lripy, 1870. Ungulata, Perissodactyla, Titanotheriid:e. 
Proc. Acad. Nat. Sci. Phila., 1870, 1-2; Cont. Extinct Vert. Fauna West. Terr., in 
Rept. U. S. Geol. Surv. Terr., for 1873, I, 335; Osborn, Bull. Am. Mus. Nat. 
Hist., N. Y., XVI, 97-101, figs. 3-6, Feb. 18, 1902. 
Megaceratops Corr, Proc. Acad. Nat. Sci. Phila., Mar. 25, 1873, 102; Palzeont. 
Bull., No. 15, pp. 4-5, Aug. 20, 1873; Proc. Am. Philos. Soc., XIII, 66, 1873. 
Type: Megacerops coloradensis Leidy, from Colorado. 
Extinet. ‘‘The specimen corresponds with that portion of the face of Sivathe- 
rium comprising the upper part of the nose, together with the forehead and 
anterior horn cores." 
Megacerops: u£y as, great; Képas, horn; 6wW,aspect—in allusion to the horn cores. 
Megaceros (subgenus of Cervus) OwEN, 1844. Ungulata, Artiodactyla, Cervide. 
Rept. Brit. Ass. Adv. Sci., for 1843, 237-239, 1844; Odontography, pt. 111, 533, 
Desc. Plates, p. 33, pl 134, fig. 5, 1845; Brit. Foss. Mamm. and Birds, 444-468, 
figs. 182-190, 194, 1846 (raised to generic rank). 
Megaloceros P1crET, Traité Paléont., 2° éd., I, 355, 1853. 
Type: Megaceros hibernicus Owen, from the Pleistocene of Ireland. (See Megalo- 
ceros Brookes, 1828. ) 
Extinct. 
Megaceros: wéyas, great; Képas, horn—in allusion to the enormous, palmate 
antlers. 
Megacrodon Rorn, 1899. Ungulata, Condylarthra, Phenacodontide. 
Revista Mus. La Plata, IX, 384-385, 1899; AMEGHINO, Sin. Geol.-Paleont., Segundo 
Censo Nac. Repub. Argentina, I, Supl., p. 12, July, 1899. 
Megalacrodon RorH, Am. Journ. Sci. & Arts, 4th ser., 1X, 266, fig. 4, Apr., 1900. 
Species: Megacrodon prolivus Roth, and M. planus Roth, from the Territory of 
Chubut, Patagonia. 
Extinct. 
Megacrodon: uéy as, great; &kpos, pointed; dd@v—ddovs, tooth. 
Megaderma Grorrroy, 1810. Chiroptera, Megadermatid:e. 
Ann. Mus. Hist. Nat., Paris, XV, 187-190, 197-198, 1810; Oxen, Lehrbuch 
Naturgesch, 3ter Theil, Zool., 2te Abth., 919-921, 1816; Leacu, Trans. Linn. 
Soc: Soul. pt. 15 74.78, 821° 
Type: Vespertilio spasma Linnzeus, from Ternate Island, Malay Archipelago. 
Megaderma: éyas, great, large; ó£oua, skin—from the large wings and inter- 
femoral membrane. ‘‘Ainsi, nommés parce que c'est chez eux que le systéme 
cutané est porté à sa plus grande étendue."  (GEorrRov.) 
Megadontomys (subg. of Peromyscus) MERRIAM, 1898.  Glires, Murid:e, Cricetinze. 
Proc. Biol. Soc. Wash., XII, 115-117, fig. 20, Apr. 30, 1898; Banas, Bull. Mus. 
Comp. Zool, Cambridge, XXXIX, 27-29, figs. 5-7, Apr., 1902 (raised to 
generic rank). 
Type: Peromyscus (Megadontomys) thomasi Merriam, from the mountains near 
Chilpancingo, Guerrero, Mexico. 
Megadontomys: uéy as, great, large; dd0vs, óÓóvros, tooth; “0s, mouse—from 
the very large, heavy molars. 
