R0DENT1A. 
Mamrn . 35 
Geomyidte atid Heteromyidas. 
Platygeomys tylorhius angustirostris , Mexico, Merriam, P. Soc. Washington 
xvi, p. 81, n. subsp. 
Thomomys lielleri , Oregon, p. 165, aphrastus, Low. California, p. 219, 
Elliot, Field Mas. Zool. iii, n. spp. 
Perognathus helleri , p. 166, bailey i rudinoris , p. 167 ,femoralis mesopolius , 
p. 168, kneJcus , p. 169, mesembrinus , p. 251, elibatus^jpericalles, p. 252, 
California, hispidus maximus , p. 253, Oklahoma Territory, Elliot, 
t. c., n. spp. & subspp. 
Heteromys ( Liomys ) par alius, Mexico, Elliot, Field Mus. Zool. iii, p. 233, 
n. sp. 
Perodipus obscurus , Durango, Mexico, Allen, Bull. Amer. Mus. xix, p. 603, 
n. sp. 
JDipodomys montanus Baird, 1855 = D. elator Merriam, 1894, Mearns, 
P. Soc. Washington xiii, p. 167, 1900 ; deserti helleri, California, 
merriami arenivagus , Mexico, p. 249, m. mortivallis , California, p. 250, 
Elliot, Field Mus. Zool. iii, n. subspp. 
OCTODONTIDTE. 
Octodontomys n. nom. for Neoctodon Thomas, 1902, nec Bedel, 1892, Palmer, 
Science (2) xvii, p. 873. 
Thricomys forsteri, Paraguay, Thomas, Ann. Nat. Hist. (7) xi, p. 227, 
n. sp. 
Proechi\no]mys vacillator , Brit. Guiana, Thomas, t. c. p. 490, n. sp. 
Ctenomys azarce , Buenos Aires, Thomas, t. c. p. 228 & xii, p. 243 ; robustus , 
p. 185, sericeus , p. 187, colburni , p. 188, Patagonia, Allen, Bull. Amer. 
Mus. xix : n. spp. 
Hystricid^e and Erethizontidas. 
Atherura zygomatica , Palo Aor, Johor, Miller, Smithson. Collect, xlv, 
p. 42, n. sp. 
Trichys macrotis , N. W. Sumatra, Miller, P. U. S. Mus. xxvi, p. 469, 
n. sp. 
Coendou Icenatus, Chiriqui, Ann. Nat. Hist. (7) xi, p. 381, centralis, Matto 
Grosso, P. Zool. Soc. London 1903, ii, p. 240, Thomas, n. spp. 
Echinoprocta Gray, for Synetheres rufescens , Cabrera, Bol. Soc. espan. i, 
p. 158, 1901. 
Erethizon epizanthus nigrescens , B. Columbia, A llen, Bull. Amer. Mus. 
xix, p. 558, n. subsp. 
Dasyproctid,® and Caviid^e. 
Dasyprocta lucifer , Orinoco, p. 491, l. cayennce , Cayenne, p. 492, Thomas, 
Ann. Nat. Hist. (7) xi, n. sp. & subsp. 
Myoprocta , n. g. for Basyprocta acouchy (Linn.), Thomas, op. cit. xii, 
p. 464. 
Cavia aperea, brain, Wallenberg, Anat. Anz. xxiv, p. 199. 
Leporida: and Ochotonid^e. 
Lepus creticus, Crete, p. 126, cyprius , Cyprus, p. 127, Hamilton, Ann. Nat. 
Hist. (7) xi ; harterti, Sahara, Nov. Zool. x, p. 301 , capensis centralis , 
Cape Colony, Ann. Nat. Hist. (7) xii, p. 344, Thomas ; gichiganus , 
