6 AMERICAN MUSEUM NOVITATES 

NO. 3466 

Fig. 2. Dorsal and ventral views of the skull, and occlusal view of the maxillary dentition of Mar- 
mosa murina, showing the anatomical limits of craniodental measurements defined in the text. 
formly colored, unpatterned; manus mesax- 
onic (digit III longer than adjacent digits II 
and IV); manual claws small, not exceeding 
fleshy apical pads in length; central palmar 
surface of manus smooth (not densely tuber- 
culate); digit IV of pes longer than adjacent 
digit III; caudal scales in spiral series; middle 
hair of each caudal-scale triplet petiolate 
(narrower basally than at midlength), thicker, 
and usually more heavily pigmented than lat- 
eral hairs; tail longer than the combined 
length of head and body, not incrassate; ven- 
tral surface of tail-tip modified for prehen- 
sion; premaxillary rostral process usually 
