o INDEX GENERUM MAMMALIUM. 
Abromys Gray, 1868. Glires, Heteromyide. 
Proc. Zool. Soe. London, 1868, 202. 
Type: Abromyslordi trom British Columbia. (Abromys=Perognathus Maximilian.) 
Abromys: &fjpós, soft; 0s, mouse—trom the long, soft fur. \ 
Abrothrix (subgenus of Mus) WarERHOUSE, 1837. Glires, Murid:e, Cricetinze. 
Proc. Zool. Soc. London, No. L, Nov. 21, 1837, p. 21; Gray, List Spec. Mamm. 
Brit. Mus., 114, 1843 (raised to generic rank). 
Habrothriz WAGNER, Suppl. ScugEBER's Siiugthiere, III, 516—523, 1843 (sub- 
genus); AGassiz, Nomenclator Zool., Mamm. Add., 5, 1846; Index Univ., 170, 
1846; 2d ed., 2, 1848; BunMEIsTER, Uebersicht Thiere Brasil, I, 178, 1854 
(subgenus). 
Type: Mus ( Abrothrix) longipilis Waterhouse, from Coquimbo, Chile. 
Abrothrix: &fipoós, soft; 602, hair—irom the long, soft hair. 
Acantherium (subgenus of Acanthion) Gray, 1847. Glirés, Hystricidee. 
Proc. Zool. Soe. London, 1847, 102-104. 
Species: Acanthion javanicum F. Cuvier, from Java; and A. flemingii Gray (a hybrid 
between a male Acanthion javanicum and a female Hystrix cristata,” bred in the 
Surrey Zoological Gardens). 
Acantherium: &kav6a, spine; 67piov, wild beast—from the spines on the head, 
back, and other parts of the body. 
Acanthion F. Cuvigr, 1822. Glires, H ystricid:e. 
Mém. Mus. Hist. Nat., Paris, IX, 424-425, 431-432, pl. 20 bis, figs. 3-6, 1822; 
Dents Mamm., 177-178, 256, pl. rxvir, 1825. 
Acanthia Gray, Thomson's Ann. Philos., XXVI, 541, Nov., 1825 (misprint). 
Type: Acanthion javanicum F. Cuvier, from Java. In the first reference Acan- 
thion is given as a subgenus but used as a full genus. It seems to be only a 
French name, except on p. 431, where it is abbreviated (‘A. javanicum’ ). 
Acanthion: àav6icov, porcupine. 
Acanthocherus Gray, 1866. Glires, Hystricidz. 
Proc. Zool. Soc. London, 1866, 309-310, pl. xxxr. 
Species: Acanthocherus bartlettii Gray (a hybrid between a male Acanthion javani- 
cum and a female Hystrix cristata, bred in the Surrey Zoological Gardens), and 
A. grotei Gray, from India. (See Acantherium Gray, 1847.) 
Acanthocherus: &KavGa, spine; y01poc, hog—from the spines on the nape, back, 
and other parts of the body. 
Acanthodelphis (subgenus of Phocena) Gray, 1866. Cete, Delphinidee. 
Cat. Seals and Whales Brit. Mus., 304-305, 1866; Synopsis Whales and Dolphins 
Brit. Mus., 8, 1868 (raised to generic rank). 
Type: Phocena spinipinnis Burmeister, from the Rio de la Plata. 
Acanthodelphis: &kavGa, spine; 6éA dis, dolphin—in allusion to the several 
series of dermal spines on the upper edge of the dorsal fin. 
Acanthodon Meyer, 1848. Ferz, n 
Neues Jahrbuch Mineralogie, 1845, 701-702. 
Type: Acanthodon ferox Meyer, from Weisenau, Germany. 
Extinct. 
Acanthodon: &av6a, spine; 00 v—080)«, tooth. 
Acanthoglossus Gervais, 1877. Monotremata, Tachyglosside. 
Comptes Rendus, Paris, LXX XV, No. 19, p. 838, séance du Nov. 5, 1877. 
Type: Tuchyglossus bruijnii Peters & Doria, from a peak of the Arfaks, New Guinea. 
Name preoccupied by <Acanthoglossa Kraatz, 1859, a genus of Coleoptera. 
Replaced by Zaglossus Gill, May 5, 1877; by Proechidna Gervais, Nov. 30, 1877, 
and by Bruynia Dubois, 1882. 
Acanthoglossus: &kavGa, spine; yA@o6a, tongue—irom the spines on the 
tongue. 

“For detailed description of this specimen, see Waterhouse, Nat. Hist. Mamm., II, 
Rodentia, 468-469, 1848. 
