74 INDEX GENERUM MAMMALIUM. 
Acerotherium (see Aceratherium). Ungulata, Perissodactyla, Rhinocerotide. 
Achzaenodon Corr, 1874.4 Ungulata, Artiodactyla, Suidee. 
Ann. Rept. U. 8. Geol. and Geog. Surv. Terr. for 1873, 457-458, 1874; Tert. Vert., 
342-344, pls. Lvir, Lvira, 1885. 
Archxenodon Corr, Paleont. Bull., No. 17, pp. 2-3, Oct. 25, 1873 (misprint). 
Type: Achwnodon insolens Cope, from the Eocene (Bridger) of Mammoth Buttes, 
near the head of South Bitter Creek, Wyoming. 
Achenodon: a, without; xcv, to gape; 066v —0907c, tooth—in allusion to the 
** dental series without diastema."' 
Acheus F. Cuvier, 1825. Edentata, Brady podid:e. 
Dents Mamm., 194—195, 256, pl. Lxxvirt, 1825. 
Achaeus ERMAN, Reise um die Erde, 22, 1835. 
Type: ‘Le paresseux ai’ from tropical America. 
Acheus: Proper name Ayards, Achzeus. (f Nom que rapporte la fable comme 
étant celui d'un Grec stupide et indolent’? ( CuvrER). 
Achlis REgicuEeNBACH, 1845. Ungulata, Artiodactyla, Cervid:e. 
[‘ Gray ^», fide AGassiz, Nomenclator Zool., Mamm., 1, 1842—nomen nudum. ] 
RgrcHENBACH, Vollstindigste Naturgesch. In- und Auslandes, Sáugeth., III, 
12-15, pl. i1, figs. 7-11, 1845. 
According to Reichenbach, 4eA/is (subgenus) includes 1 species and 2 varieties: 
Cervus tarandus Linneeus, from Eurasia; Cervus tarandus var. arcticus Richard- 
son, from the Barren Grounds of North America; and C. tarandus var. sylvestris 
Richardson, from the wooded region between Athapescow Lake and Lake 
Superior, and 80-100 miles from Hudson Bay. 
Achlis: Latin achlis, a wild beast of the north (Alces?). 
Achlysictis AwEaGHniNo, 1891. Marsupialia, ? 
Revista Argentina Hist. Nat., I, Entr. 3a, 147-148, fig. 52, June 1, 1891. 
Type: Achlysictis lelongii Ameghino, from the Lower Oligocene in the vicinity of 
the city of Paraná, Argentina. 
Extinct. 
Achlysictis: @yAvs, mist, gloom; z«r:c, weasel. 
Achyrodon Owen, 1871. Marsupialia, Amphitheriidze. 
Mesozoic Mamm., in Mon. Paleeontograph. Soc., XXIV, [No. 5,] 37-40, pl. rr, 
figs. 5-8, 1871. 
Achyrydon: ScuppER, Nomenclator Zool., Index Univ., 4, 1882. 
Species: Achyrodon nanus Owen, and A. pusillus Owen, from the Purbeck of 
Durdlestone Bay, Swanage, Dorsetshire, England. 
Extinct. ‘‘Represented by four more or less mutilated mandibular rami." 
Achyrodon: &yvpov, chaff, husks (in the sense of * pointed"); 08v = ó6 ovs, 
tooth—in allusion to the sharp cusps of the molars. ‘‘The resemblance of 
these cusps to needle-points suggested the generic name" (OwEN). 
Acinonyx Brookes, 1828. Fer:z, Felide. 
“Cat. Anat. and Zool. Museum of Joshua Brookes, London, 33, 1828"' (previous to 
July 14). (Sale catalogue. ) 
Burnett, Quart. Journ. Sci. Lit. and Art, XXVIII, for Oct.-Dec., 1829, 349, 1830. 
Species: Acinonyx guépard, and A. venator (the hunting leopard, type, fide 
Burnett), from Asia and Africa. 
Acinonyx: iva, thorn, prick (akis, &«i8os, point); 6vvé, claw—from the 
nonretractile, pointed, claws. 
Acodon (see Akodon). Glires, Murid:e, Cricetinee. 

«The original spelling of this name, dating from 1873, is clearly a misprint. 
> Achlis Gray, quoted by Agassiz from Thomson's Ann. Philos., 1825, has not 
been found in the volume cited. 
