MICROPTERNODUS—MICROSUS. 493 
Micropternodus Marrurw, 1908. Insectivora, Leptictidee. 
Bull. Am. Mus. Nat. Hist., XIX, 204—205, fig. 3, May 9, 1903. 
Type: Micropternodus borealis Matthew, from the White River Oligocene of Pipe- 
stone Springs, Jefferson County, Montana. 
Extinct. Based on a lower jaw with pj-m,, and alveoli of the auterior teeth. 
Mieropternodus: uicpós, small; zréova, heel; 030vc, tooth—in allusion to the 
small heel of the lower third premolar. 
Micropteropus (subg. of Zpomophorus) MaArscuig, 1899. Chiroptera, Pteropodidee. 
Fledermiiuse Berliner Mus. Naturkunde, Lief. I, Megachiroptera, 37, 57-58, 1899. 
Type: Epomophorus pusillus Peters, from Yoruba, West Africa. 
Micropteropus: piepós, small; 4- Pteropus. 
Micropterus (subgenus of Delphinus) WAGNER, 1846. Cete, Physeteridee. 
Schreber’s Siugthiere, VII, 281, 352-358, Tab. ccexrvrir, 1846. 
Micropteron Escuricur, K. Danske Vidensk. Selsk. Skrifter, Nat. & Math. Afd., 
Kjóbenhavn, 5te Rekke, I, 97, 1849 (raised to generic rank); Zool. Unter- 
such. Nord. Wallthiere, I, 50-51, 1849. 
Type: Delphinus micropterus Cuvier, from the coast of France. 
Name preoccupied by Micropterus Lacépéde, 1802, a genus of Pisces. 
Micropterus: jutkpos, small; zrepóv, fin. 
Microrhynchus Jourpan, 1834. Primates, Lemurid:e. 
**Thése inaug. à la Faculté de Science de Grenoble, 1834" (fide Mivart, 1864); 
Gray, Proc. Zool. Soc. London, 1863, 141; Cat. Monkeys, Lemurs & Fruit- 
eating Bats Brit. Mus., 89-90, 1870; Mivarr, Proc. Zool. Soc. London, 1864, 638. 
Type: Lemur laniger Gmelin, from Madagascar. 
Name preoccupied by Microrhynchus Megerle, 1823, a genus of Coleoptera. (See 
Avahi Jourdan, 1834. ) 
Microrhynchus: puukpos, small; pUvy yoc, snout. 
Microsciurus (subgenus of Sciwrus) ALLEN, 1895. Glires, Sciuridee. 
Bull. Am. Mus. Nat. Hist., New York, VII, Art. X, 332-333, Nov. 8, 1895. 
Type: Sciwrus ( Microsciurus) alfari Allen, from Jiménez, Costa Rica. 
Microsciurus: ikpos, small; + Seiwrus—in allusion to the small size, the total 
length being only 290 millimeters, or 114 inches. 
Microsorex (subgenus of Sorex) Barrp, 1877. Insectivora, Soricidee. 
Batrp, in Coues’ Notes Am. Insect. Mamm., Bull. U. 8. Geol. & Geog. Surv. 
Terr., III, No. 3, pp. 643, 646, May 15, 1577. 
Type: Sorex hoyi Baird, from Racine, Wisconsin. 
Microsorex: uk pos, small; 4- Sorex. 
Microspalax (subgenus of Spalax) Neurine, 1898. Glires, Spalacidee. 
Sitzungs-Ber. Gesellsch. Naturforsch. Freunde Berlin, for Dec. 21, 1897, No. 
10, p. 168, 1898. 
Name provisionally proposed for the smaller species of Spalar.  ‘‘ Wollte man 
eine subgenerische Theilung vornehmen, so müssten die kleineren Spalav- 
Arten etwa als ‘Microspalax’ abgetrennt werden; doch halte ich dieses bei der 
geringen Zahl der Arten vorlüufig nicht für nóthing."  (NEnniNG.) 
Name preoccupied by Microspalax Trouessart, 1885, a genus of Arachnida. 
Replaced by Nannospalax Palmer, 1903. 
Microspalax: uikpos, small; -i- Spalax. 
Microstylops Amrcuino, 1901. Tillodontia, Pantostylopidee. 
Bol. Acad. Nac. Cien. Córdoba, XVI, 426, July, 1901 (sep. p. 80). 
Type: Microstylops clarus Ameghino, from the ‘Cretaceous’ of Patagonia. 
Extinct. 
Microstylops: uukpos, small; 6rbAos, pillar; ow, aspect. 
Microsus Lxipv, 1870. Primates, Hyopsodide. 
Proc. Acad. Nat. Sci., Phila., Oct. 4, 1870, 113; Osporn, Bull. Am. Mus. Nat. 
Estes Ne Ye, XVI, 172; June 28,1902; 
