616 DECLIDURUS. 
posterior secondary cusp; minute cusp on cingulum anteriorly, and a 
second posteriorly; small premolar separated from large premolar, 
and not occupying all the space between that tooth and the canine. 
Color. ‘‘Upper parts pure white to roots of hairs, or gray mixed, 
the hairs then being slaty at base.’’ Underneath the hairs on belly 
are slaty on basal halves; on chin and sides of body pure white. 
Measurements. ‘‘Head and body, 80; tail, 22; hind foot, 10; ear, 
13; forearm, 66; third finger, metacarpal, 64; first phalanx, 10; fifth 
finger, metacarpal, 35; first phalanx, 17; calcar, 22. Skull: greatest 
length, 18; front of canine to back of third upper molar, 8.1.” 
(Thomas, I. c.) 
Fig. 121. NOCTILIO L. MASTIVUS 
No. 37435 U. S. Nat. Mus. Coll. 
Enlarged twice nat. size. Incisors enlarged 4 times. 
