MAMMALS OF THE PHILIPPINE ISLANDS. 3 



LIST OF PHILIPPINE MAMMALS. 



Artificial key to the families of Philippine m.atnmals. 



Posterior limbs absent (dugong) Dugongldae, p. 45. 



Posterior limbs present. 

 Toes furnished with hoofs. 

 Both sexes without horns. 



Upper incisors present (pigs) Snidae, p. 38. 



Upper incisors wanting (mouse-deer) Tragulid®, p. 39. 



Males with horns. 



Solid bony horns (antlers) in male only (deer) Cervldas, p. 40. 



Hollow horns in both sexes (caribao) Bovidae, p. 45. 



Toes furnished with claws or nails. 



Upper parts covered with scales; teeth absent (pangolin). 



Manidse, p. 35. 

 Upper parts without scales; teeth present. 



Fore and hind limbs connected by a membrane for flying or "sailing." 

 Fingers not greatly elongated for support of flight membrane 

 (parachute). 



Feet webbed to nails (flying-lemur) Galeopteridse, p. 7. 



Feet not webbed (flying-squii-rels) Petauristidae, p. 25. 



Fingers greatly elongated for support of flight membrane (true 

 wing) . 

 Index finger with three phalanges (fruit-bats).. Pteropidse, p. 1. 

 Index finger with less than three phalanges (bats) . 



Upper incisors absent Megadermidse, p. 13. 



Upper incisors present. 



Tail not contained entirely within interfemoral membrane. 

 Tail extending beyond posterior end of the interfemoral 



membrane Molossids, p. 20. 



Tail perforating upper surface of interfemoral mem- 

 brane Emballonuridse, p. 12. 



Tail contained entirely within interfemoral membrane. 



Ear with tragus Vespertilionidae, p. 16. 



Ear without tragus. 



Toes with two phalanges each Hipposideridse, p. 15. 



Toes (except hallux) with three phalanges each. 



Rhinolophidae, p. 13. 

 Fore and hind limbs not connected by a membrane for flying or 

 "sailing." 

 Front teeth chisel-shaped, separated from grinding teeth by a wide 

 space (no canine teeth; gnawing animals). 

 Back furnished with long quills (porcupine).... Hystricidae, p. 34. 

 Back without quills. 



With four or more grinding teeth in each jaw (squirrels). 



Scinridae, p. 24. 

 With two or three grinding teeth in each jaw (rats, etc.). 



Muridae, p. 26. 



