33. DIPHYLLA.. 551 



Fvir, above, reddish brown ; beneath, yellowish white, darker at 

 the base of the hairs. 



Skull very similar to that of D. rufus, but the jaws are slightly 

 longer, owing to the presence of an additional rudimentary molar in 

 both jaws. Lower incisors narrow, much expanded in the direction 

 of the jaws, pectinated, forming a semicircular row, touching each 

 other ; the outer incisors wider than the inner ones, with six 

 notches, the inner incisors with three ; upper incisors and canines 

 as in D. rufus ; the two upper premolars nearly equal in size, 

 narrow, with sharp-edged slightly notched crowns ; close behind 

 them the single very smaU oval molar, its long diameter at right 

 angles to the direction of the jaw ; in the lower jaw the premolars 

 are smaller and the molar larger, the first premolar with a slight 

 indication of a central cusp equal in size to the third, which is 

 somewhat similar in shape, and larger than the second, which 

 slightly exceeds in size the rudimentary molar. 



The alimentary canal (which I have not had an opportunity of 

 examining) is probably generally similar to that of Besmodus rufus. 



Length, head and body, about 2"-6, head 1", ear 0"-65, tragus 0"-3, 

 forearm 2", thumb 0"-5 ; third finger — metacarp. 2", 1st ph. 0"'45, 

 2nd ph. 1"-1, 3rd ph. 0"-9 ; fourth finger^metacarp. 2", Ist ph. 

 0"-4, 2nd ph. 0"-8 ; fifth finger— metacarp, l"-95, 1st ph. 0"-45, 

 2nd ph. 0"-65 ; tibia 0"-7, foot 0"-55*- 



Hah. Brazil. 



* Prof. Peters most kindly afforded me au opportunity of examining (during 

 my visit to tbe Berlin. Museum) a well-preserved specimen of this little-known 

 species. 



