676 MONOPHYLLUS. 
longer than interfemoral membrane; calcaneum rudimentary; inner 
incisors larger than outer: lower incisors small; zygomatic arches 
present. 
Fic. 143. MONOPHYLLUS PORTORICENSIS. 
No. $6258 U.S. Nat. Mus. Coll. 
24 times nat. size. Nose enlarged 5 times. 
KEY GO) GEE SPECIES: 
A. Size small; second upper premolar with postero- PAGE 
internal lobe well developed...............J VI. portoricensts he 
B. Size large; second upper premolar with postero- 
internal lobe rudimentary. 
a. No space between first and second upper pre- 
TOLATS!. (3. els ¢ See het Re Rite eee V. plethodon 6 
b. Aspace between first and second upper pre- 
~~ 
~~ 
molars. 
a.’ Bony palate narrow, strongly arched. 
a«° Porearm acum Ss = pe On eka eee M. lucie 678 
bei? PB oneantia: 6 sana ote we, eee es! VW. clinedaphus 678 
b.’ Bony palate broad, slightly arched. 
a.’ ‘Size small, total length; 67 mm .5..2 2 VM. cubanus 678 
b.” Sizelarge; total lengthy, 7255 mami. Sy ee V.redmant 679 
