100 INDEX GENERUM MAMMALIUM. 
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Anancus—Continued. 
Type: Anancus macroplus Aymard, from Mt. Coupet, near Puy, France. 
Extinct. 
Anancus: &v, without; ay Kos, bend, hollow—probably in allusion to the tusks or 
upper incisors, which are straight in comparison with those of some species of 
Elephas. i 
Anantiosodon AwrEcGniNo, 1891. Edentata, Dasy podid:e. 
Nuevos Restos Mamíf. Fós. Patagonia Austral, 41-42, Aug., 1891; Revista Argen- 
tina Hist. Nat., I, entr. 5a, 327-328, Oct. 1, 1891. 
Type: Anantiosodon rarus Ameghino, from the lower Eocene of southern Pata- 
gonia. 
Extinct. ‘‘Representado por un trozo de rama mandibular izquierda con parte 
de la sinfisis.”’ 
Anantiosodon: av, negative; &vrios, opposite; 000v — 0800s, tooth—possibly 
so named because the opposite teeth are wanting in the type specimen. 
Anaplotherium (see Anoplotherium). Ungulata, Artiodactyla, Anoplotheriide. 
Anaptogonia (subgenus of Arvicola) Corr, 1871. Glires, Murid:ze, Microtine. 
Proc. Am. Philos. Soc., XII, 87, 91-92, fig. 18, Jan.-July, 1871; Journ. Acad. 
Nat. Sci., Phila., 2d ser., XI, pt. 2, pp. 201-203, 1899 (raised to generic rank). 
Anaptagenia Trovgssart, Cat. Mamm. Viv. et Foss., Rodentia, in Bull. Soc. 
d Études Sci. d'Angers, X, for 1880, 2e fasc., 154, 1881 (misprint). 
Type: Arvicola hiatidens Cope, from the Pleistocene of Port Kennedy Bone Cave, 
Montgomery County, Pennsylvania. 
Extinct. Based on several molar teeth. 
Anaptogonia: &v, negative; &zro, to bind, fasten; ywrvia, angle—in allusion to 
i , 5 , , , , 5 

the separation of the enamel folds of the molars. 
Anaptomorphus Corr, 1872. Primates, Anaptomorphide. 
Paleeont. Bull. No. 8, p. 1, Oct. 12, 1872; Proc. Am. Philos. Soc., XII, for July—Dec., 
1872, 554, Jan., 1873. 
Type: Anaptomorphus exmulus Cope, from the Eocene of the northern part of the 
basin of Green River, Wyoming. 
Extinct. 
Anaptomorphus: &v, negative; &zr, to bind, fasten; op), form—probably in 
allusion to the lower jaw, in which the ‘‘symphysis, though massive, is not 
co-ossified.”’ 
Anarnak La4cÉrEpE, 1804. Cete, Physeterid:e. 
Hist. Nat. Cétacées, pp. xxxviii, 164, 1804. 
Ananarcus DvwÉRIL, Zool. Analytique, 28, 1806. 
Anarcus Frorter, Duméril’s Analyt. Zool. aus Franz. mit Zusützen, 29, 1806. 
Anarnacus TIEDEMANN, Zoologie, I, 575, 1808; RarrNEsQUE, Analyse de la Nature, 
61, 1815; Lesson, Man. Mammalogie, 418, 1827 (in synonymy); Nouv. Tab- 
leau Régne Animal, Mamm., 200, 1842; AGasstz, Nomenclator Zool., Mamm., 
2. 1842. 
Ananareus GRAY, List Spec. Mamm. Brit. Mus., p. xxiii, 1843 (misprint). 
Anarmacus Zrrrezu, Handbuch Paleont., IV, 178, 1892 (misprint). 
Type: Anarnak groenlandicus Lacépéde, from the coast of Greenland. 
Anarnak: Greenland name of a kind of porpoise. 
Anastylops AMEGHINO, 1897. Tillodontia, Notostylopidee. 
La Argentina al través de las Ultimas Epocas Geológicas, 16 footnote, 1897 
(nomen nudum); Bol. Inst. Geog. Argentino, XVIII, 490—491, Oct. 6, 1897 
(sep. pp. 86-87). 
Type: Anastylops vallatus Ameghino, from the ‘Cretaceous’ of Patagonia. 
Extinct. 
