ORYZOMYS. 241 
222. zygomaticus (Oryzomys), Merr., Proc. Wash. Acad. Scien., 111, 
Lar, -p; 25. 
GUATEMALAN RIcE Rat. 
Type locality. Nenton, Guatemala. 
Geogr. Distr. Guatemala. 
Genl. Char. Size medium; hind feet large. Skull: superciliary 
ridges strongly developed and everted; zygomata curving down- 
ward below level of posterior root. 
Color. Above pale fulvous, lined with black on dorsal portion; 
under parts white, suffused with buff. 
Measurements. Total length, 290; tail vertebre, 152; hind 
foot, 33. 
223. cozumelz (Oryzomys), Merr., Proc. Biol. Soc. Wash., xiv, 
IQOI, p. 103. 
CozuMEL IsLanp RicE Rat. 
Type locality. Cozumel Island, Yucatan, Mexico. 
Genl. Char. Size large, similar to O. aquaticus. Skull: braincase 
broad posteriorly, carrying lateral beads outwards. 
Color. Above grayish bistre; sides and rump suffused with pale 
fulvous; beneath whitish to pale salmon; tail dusky above, paler 
beneath; ears dark brown. 
Measurements. Total length, 332; tail vertebre, 182; hind 
F00t- 30; 
224. panamensis (Oryzomys), Thomas, Ann. Mag. Nat. Hist., 7th 
Ser., VIII, 1901, p. 252. 
PanaMA Rice Rat. 
Type locality. Near city of Panama, Panama. 
Genl. Char. Size large; tail about equal to head and body; fur 
soft. Skull: supraorbital ridges without heavy beads; molars 
small, narrow. 
Color. Upper parts tawny ochraceous, lined with black; sides 
lighter; under parts grayish; outer sides of arms and legs gray; tail 
brown above, white below; hands and feet whitish; ears brown. 
Measurements. Total length, 261; tail, 130; hind foot, 28.5; ear, 
18. Skull: tip of nasals to front of interparietal, 28.5; zygomatic 
breadth, 16.4; interorbital constriction, 5; length of nasals, 12.5; 
length of upper molar series, 4.2. 
225. talamancz (Oryzomys), Allen, Proc. U. S. Nat. Mus., xiv, 1891, 
p- 193. 
TALAMANCA RICE Rat. 
Type locality. Talamanca, Costa Rica. 
