676 MONOPHYLLUS. 



longer than interfemoral membrane; calcaneum rudimentary; inner 

 incisors larger than outer; lower incisors small; zygomatic arches 

 present. 



FIG. 143. MONOPHYLLUS PORTORICENSIS. 



No. 86258 U. S. Nat. Mus. Coll. 

 2'/2 times nat. size. Nose enlarged 5 times. 



KEY TO THE SPECIES. 



A. Size small ; second upper premolar with postero- PAGE 

 internal lobe well developed M. portoricensis 677 



B. Size large ; second upper premolar with postero- 

 internal lobe rudimentary. 



a. No space between first and second upper pre- 



molars M. plethodon 677 



b. A space between first and second upper pre- 

 molars. 



a/ Bony palate narrow, strongly arched. 



a." Forearm 42 mm M. lucice 678 



b." Forearm 38 mm M. clinedaphus 678 



b/ Bony palate broad, slightly arched. 



a." Size small, total length, 67 mm M. cubanus 678 



b." Size large, total length, 72.5 mm M. redmani 679 



