846 INDEX GENERUM MAMMALIUM. 
Iacchus (see Jacchus). Primates, Hapalidee. 
Iaculus (see Jaculus ERXLEBEN). Glires, Dipodidee. 
Ibex Fnuiscu, 1775. Ungulata, Artiodactyla, Bovidze. 
Das Natur-System vierfüss. Thiere, in Tabellen, 1, Gen. Tab., 1775; PaArLas, 
Spicilegia Zoologica, II, fasc. 11, pp. 31—57, tab. ru, 1776. 
Type: ‘Der Steinbock’ of Europe. The only-species described by Pallas, in 1776, 
is Ibex sibiricus from the mountains of Siberia. 
Ibex: Lat. iber, a kind of goat. 
Ichneugale Jourpan, 1852. Ferme, Viverrid:e. 
"Revue Sociétés Savantes, 1852" (nomen nudum), fide Frr;gmor, Archiv. Mus. 
Hist. Nat. Lyon, III, 67, 69, pl. rv, figs. 16-19, 1881 (synonym of Viverra 
leptoryncha) . 
Type from Grive Saint Alban, Dépt. de l'Isére, France. The species was not 
named by Jourdan, but was called Viverra leptorhyncha by Filhol in 1881. 
Extinct. Based on a lower jaw and an upper tooth (‘carnassiére’). 
Ichneugale: ixvevo, to track, to hunt; vad, weasel. 
Ichneumia I. Grorrroy, 1837. Fere, Viverride. 
Ann. Sci. Nat., Paris, 2* sér., Zool., VIII, 251, Oct., 1837; Comptes Rendus, Paris, 
V, 580, 1837; Mag. de Zool., 2° sér., I, Mamm. (pls. 11-16), 3-18, 1839; Gray, 
Proc. Zool. Soe. London, 1864, 566—567. 
Ichneumonia BrvrH, in Cuvier's Animal Kingdom, 1840, 93; new ed., 1849, 93; 
new ed., 1863, 81. 
New name for the genus provisionally called Lasiopus by Geoffroy in 1835, 
which is preoccupied by Lasiopus Dejean, 1833, a genus of Coleoptera. ‘‘Je laisse 
de méme de cóté le nom provisoire de Lasiope pour lui substituer celui d' Ichneu- 
mie, dérivé du méme radical que le mot Jchneumon, et indiquant immédiatement 
par son analogie avec celui-ci, les affinités les plus proches du genre qu'il 
désigne." (Grorrroy, Mag. Zool., 1839, p. 5.) 
Ichneumia: 2yveOucov, ichneumon. 
Ichneumon Friscu, 1775.* Fere, Viverride. 
Das Natur-System vierfüss. Thiere in Tabellen, 11, Tab. Gen., 1775; G. Cuvier 
[Tabl. Elément. Hist. Nat. Anim., 113-114, 1798, ‘les Mangoustes’]; Lecons 
Anat. Comp., I, tabl. 1. 1800 (names only—Mangoustes, Jchneumon); LACÉPEDE, 
Tabl. Mamm., 7, 1799; Nouv. Tabl. Méthod., in Mém. l'Institut, Paris, III, 
492, 1801; Grorrroy, Cat. Mamm. Mus. Nation. Hist. Nat., 103-106, 1803. 
Type: ‘Der sptthrer’ (= Viverra ichneumon Linnzeus), of Egypt and India. 
Name preoccupied by Ichneumon Linnzeus, 1758, a genus of Hymenoptera. 
Ichneumon: 2yveou cv, ichneumon, lit. ‘tracker,’ (from 7yvéevo@, to track, hunt 
after )—in allusion to its habits. 
Ichneumonia (see Ichneumia). Ferze Viverride. 
Ichthyomys Tuomas, 1893. Glires, Muridz, Cricetinee. 
Nat. Science, London, II, No. 14, p. 286, Apr. 1, 1893; Proc. Zool. Soc. London, 
1893, 337-340, pls. xxvin, xxix figs. 1-6 (sep. issued Apr. 18); LvDEKKER, 
Roy. Nat. Wists, Til «197591895? 
Type: Ichthyomys stolzmanni Thomas, from Chanchamayo, central Peru. 
Ichthyomys: 2y0vc, fish; 0s, mouse—in allusion to the animal’s habit of eating 
fish. 

* Ichneumon Brisson, Regnum Anim., Cl. IX distrib., 181, 1762, quoted by Sher- 
born, Index Anim.. 476. 1902, is not a generic name. 
