28 Mamm. 
II. MAMMALIA. 
PEDETIDAU and OCTODONTID.E. 
The former a new family ; Thomas, P. Zool. Soc. London, 1896, p. 1024. 
Pedetes : zoological position and cranial nerves; Carruccio, Boll. Soc. 
Rom. Zool. iv, p. 263. 
Ctenomys perrensi, n. sp., Thomas, Ann. Nat. Hist. (6) xviii, p. 311, 
Corrientes, Argentina. 
Eckiuomys centralis , n. sp., Thomas, op. cit. p. 312, San Emilio, Lake 
Nicaragua. 
Triaulacodas , n. n., Lydeicker, Geographical History of Mammals, pp. 91 
& 240, to replace Aulacodus, Temm., 1827, nec Eschsch., 1822 ; 
Thryonomys, Fitz., 1867, stands. 
Hystriciile and Erituizontid2E. 
The American Porcupines are regarded by Thomas, P. Zool. Soc. Lon- 
don, 1896, p. 1025, as forming a family ( Erithizontidte ) distinct from 
the Ilystricidce. 
Hystrix cristata , reproductive organs ; Vescovi, Boll. Soc. Rom. Zool. iv, 
p. 146. 
Leporidac. 
Hyoid ; Howes, J. Anat. Physiol, norm. path. (3) x, p. 513. 
Popular account of capture of N. American species; Palmer, Bull. U. S. 
Dep. Agriculture, Ornith. and Mamm., No. 8. Subgeneric divisions 
and synopsis of American forms ; Mearns, P. U. S. Mus. xvii, 
p. 551. 
Macrotolayus , n. subg. for L. alleni ; Mearns, op. cit. p. 552. 
Lepus earopccuSi popular account, Macpherson (150) ; merriami i p. 444, 
Texas, sylvaticus holzneri , p. 544, Carrizallo Mt., arizonce major , 
p. 557, Sonora, a. minor , p. 557, Colorado, gaillardi t p. 560, Playas 
Yalley, texicanus griseus , p. 562, Texas and N. Mexico, t. deserticola } 
Deserts of Arizona, Sonora, and California, Mearns, op. cit. ; L. 
arcticus bangsi , Newfoundland, grceulandicus, Greenland, Rhoads, 
Ainer. Natural, xxx, p. 253 ; sylvaticus alacer , Bangs, P. Soc. Wash- 
ington, x, p. 136, Stilwell, Iud. Terr. : n. spp. & subspp. 
Romerolagus , n. g. for R. nelsoni , n. sp. ; Merriam, P. Soc. Washington, 
x, p. 169, Mt. Popocateptl, Mexico. 
VI. UNGULATA . 
Evolution, Fairchild (88), Horns, Heude (107), Latastis (132); 
Reproduction, Baldassare (16); Vestiges of clavicle, Leslre (143). 
AHTIODACTYLA. 
Bovidas. 
Sclater & Thomas, Book of Antelopes, pts. v & vi, describe the mem- 
bers of the groups Neotragiiuc and Cervicapritue , adopting in the 
former the genera Oreotragus , Ourebia t Raphicerus [llhaphiceros J, 
Ncsotragus , NeotraguSy and Madoqua. Antelopes of Algeria and 
Sahara, Pease, P. Zool. Soc. London, 1896, p. 809 ; Gazelles of 
Tunisia, Whitaker, t. c. p. 815. 
