494 INDEX GENERUM MAMMALIUM. 
Microsus—Continued. 
Type: Microsus cuspidatus Leidy, from the Eocene (Bridger), of Blacks Fork, 
Wyoming. 
Extinct. Based on ‘a fragment of the lower jaw containing two teeth’ (the 
second and third lower molars). 
Mierosus: Hikpósz, small; + Sus—in allusion to the small size, supposed to be 
that of ‘an animal about as big as a rabbit. ( Lerpy. ) 
Microsus Herupr, 1899. Ungulata, Artiodactyla, Suidee. 
Mém. Hist. Nat. Empire Chinois, IV, pt. 3, pp. 115-116, pl. xxx, figs. 1-5, 7 A, 9 A, 
iB PASTE E 
Species, 3: Microsus maritimus Heude, and M. macassaricus Heude, from Macassar, 
Celebes; and M. floresianus Heude, from the island of Flores. 
Name preoccupied by Microsus Leidy, 1870, a genus of extinct Primates. 
Microsyops Lripy, 1872. Glires, Proglires, Mixodectidee. 
Proc. Acad. Nat. Sci. Phila., Apr. 16, 1872, 20; Osporn, Bull. Am. Mus. Nat. 
Hist., N. Y., XVI, 205, 209-213, figs. 36-40, June 28, 1902 (ordinal position). 
Type: Microsyops gracilis Leidy, from the Eocene of Grizzly Buttes and Lodge- 
pole Trail, Wyoming. 
Extinct. Based on a lower jaw. 
Microsyops: aikpos, small; 60s, pig; ov, aspect. 
Microtherium Mrvzn, 1837. Ungulata, Artiodactyla, SOUS ahs: 
Neues Jahrb. Mineralogie, 1837, 557,676; ibid, 1841, 461; ibid, 1845, 385-386. 
Type: Microtheriuin renggeri Meyer,* from the Tertiary of Aarau, Switzerland. 
Extinet. Based on ‘‘einem Unterkieferfragment eines zierlichen Siugethiers.”’ 
Microtherium: jikpós, small; Gypiov, wild beast. 
Microtolagus Eurrior, 1901. Glires, Leporidee. 
Syn. Mamm. N. Am., Field Columbian Mus., Zool. Ser., IT, 269, 288, 1901. 
Misprint for Macrotolagus Mearns, 1896. 
Microtus ScunaxNk, 1798. Glires, Murid:e, Microtinee. 
Fauna Boica, I, Iste Abth., Nürnberg, 66, 72-73, 1798 (fide THomas, Proc. Zool. 
Soe. London, 1896, 1021); WoopwARD & SHERBORN, Cat. Brit. Foss. Vert., 
364-366, Jan., 1890; LvpEkkEn, Roy. Nat. Hist., III, 129-134, 4 figs. in text, 
1895; MiLLER, N. Am. Fauna, No. 12, pp. 14, 44-71, pls. 1-111, text figs. 20-36, 
July 23, 1896 (type fixed). 
Species, 3: Microtusterrestris Schrank ( — Mus arvalis Pallas, type); Microtus amphib- 
ius (Linneeus, F. Suec., 32; Schreber's Sáugthiere, IV, 668— Mus terrestris 
Linn:eus) ; and. Mierotus gregarius Schrank ( — Mus arvatis Pallas), from Europe. 
Mierotus: wiKpos, small; ots, @r0s, ear. 
Micrurus (subg. of Arvicola) Fonsyru Masor, 18777. — Glires, Murid:e, Microtine. 
Atti Soc. Toscana Sci. Nat., Pisa, III, for 1876, 124-130, 1877; MinLER, N. Am. 
Fauna, No. 12; p. 17, July 23; 2896: 
Type: Arvicola nebrodensis Mini-Palumbo, from Sicily. 
Name preoccupied by Micrura Ehrenberg, 1831, a genus of Vermes. 
Micrurus: uipóc, small; o?p«, tail. 
Mictomys Trur, 1894. Glires, Murid:ze, Microtinee. 
Proc. U. S. Nat. Mus., XVII, No. 999, pp. 242-243, Apr. 26, 1894; MrLLxR, N. 
Am. Fauna, No. 12, pp. 18, 35-36, fig. 10, July 23, 1896. 
Type: Moai innuitus True, from Fort Chimo, Ungava, Labrador. 


* The species is not TU. ribed in the first article, and the genus is there practically 
anomen nudum.  Mierotherium— Oplotherium Laizer et Parieu, 1838. (MEvrR, Neues 
Jahrb., 1841, 461.) 
