no. 5 



MAMMALS OF PANAMA — GOLDMAN 



27 



respectively. While the total rainfall is more copious in the humid 

 than in the arid division, the most important difference between the 

 two sections is in the comparative continuity of the supply, and its 

 effect on the fauna and flora. Thus, in the humid division moisture 

 in the form of rain or fog is received at very short intervals through- 

 out the year, and when the nights are clear heavy dew exerts its 

 refreshing influence on the vegetation, whereas in the arid division 

 long periods of drought prevail. As a result of these contrasting 

 conditions the leaves are persistent and an evergreen forest, the 

 " rain-forest " of authors, uniformly overspreads the humid division, 

 while in the arid division the leaves are largely deciduous, the forest 

 turns brown during the dry season, and may be interrupted by open, 

 grassy savannas which become parched in appearance. These zonal 

 differences, so well reflected in the character of the flora, are asso- 

 ciated with corresponding changes in the fauna. 



Mammals of Lower Tropical Zone 

 [Species marked U. occur also in Upper Tropical Zone]» 



Chironectes panamensis, Panama Water 

 Opossum. 



Didelphis marsupialis etensis, Eten Opos- 

 sum; Zorro. 



Didelphis marsupialis particeps, San Miguel 

 Island Opossum. 



Didelphis marsupialis battyi, Batty's Opos- 

 sum. 



Marmosa mexicana isthmica, Isthmian Mar- 

 mosa. 



Marmosa mexicana savannarum, Savanna 

 Marmosa. 



Marmosa fulviventer, Fulvous-bellied Mar- 

 mosa. 



Marmosa invicta, Black Marmosa. 



Metachirus opossum fuscogriseus, Allen's 

 Opossum; Zorro. 



Metachirus nudicaudatus dentaneus, Brown 

 Opossum; Zorro. 



Philander laniger derbianus, Derby's Woolly 

 Opossum. 



Philander laniger pallidus, Pale Woolly 

 Opossum. 



Philander laniger nauticus, Insular Woolly 

 Opossum. 



Peramys melanops, Panama Peramys. 



Bradypus griseus griseus, Gray Three-toed 

 Sloth. 



Bradypus ignavus, Panama Three-toed 

 Sloth. 



Cholapus hoffmanni, Hoffmann's Two-toed 

 Sloth; Perico Lijero. 



Cyclopes didactylus dorsalis, Costa Rican 

 Two-toed Anteater. 



Tamanduas tetradactyla chiriquensis, Chiri- 

 qui Three-toed Anteater. 



Myrmecophaga tridactyla centralis, Central 

 American Great Anteater. 



Dasypus novemcinctus fenestratus, Costa 

 Rican Four-toed Armadillo. 



Cabassous centralis, Central American Five- 

 toed Armadillo. 



Trichechus manatus, Manatee. 



Pecari angulatus bangsi, Bangs' Collared 

 Peccary; Zahino. U. 



Tayassu pecari spiradens, Costa Rican 

 White-lipped Peccary. U. 



Odocoileus chiriquensis, Chiriqui White- 

 tailed Deer. 



Odocoileus rothschildi, Rothschild's White- 

 tailed Deer. 



Masama sartorii reperticia, Canal Zone 

 Forest Deer. 



Tapirella bairdii, Baird's Tapir. U. 



Tylomys panamensis, Panama Climbing Rat. 



Tylomys watsoni, Watson's Climbing Rat. 



Zygodontomys cherriei cherriei, Cherrie's 

 Cane Rat. 



Zygodontomys cherriei ventriosus, Canal 

 Zone Cane Rat. 



Zygodontomys seorsus, San Miguel Island 

 Cane Rat 



Neacomys pictus, Painted Bristly Mouse. 



Oryzomys gatunensis, Gatun Rice Rat. 



Oryzomys alfaroi dariensis, Darien Rice 

 Rat. U. 



Oryzomys bombycinus bombycinus, Silky 

 Rice Rat. 



Oryzomys talamanccr, Talamanca Rice Rat. 



Oryzomys tectus tectus, Bugaba Rice Rat. 



Oryzomys tectus frontalis, Corozal Rice 

 Rat. 



