140 



THE DESEADO FORMATION OF PATAGONIA 



Asmodeus scotti Ameghino 



A. scotti Amegh., 1895, Bol. Inst. Geog. Argen., t. 15, p. 643. 

 A. scotti Amegh., 1897, Bol. Inst. Geog. Argen., t. 18, p. 477. 



This species is not represented in our collection, but I 

 reproduce Ameghino's figure of the type, and of the milk 



Fig. TOO. Upper and lower incisors, canines, and premolars 

 1/2 natural size, after Ameghino. 



dentition. Unfortunately his type figure is from the side 

 and does not give all the desired information. 



In the upper dentition, the small incisors, pitted on the 

 crown, increase regularly in size toward the rear; and each 

 has an external cingulum around the base. The canine 

 is about twice the size of the adjacent incisor, and also has 



pm '/ 



Fig. 101. Milk incisors, canine, and premolars and permanent m. i 1/2 

 natural size, after Ameghino. 



an external cingulum. The premolars increase regularly 

 in size and also have at least an external cingulum. Figure 

 101 shows a dentition which Ameghino described as the 

 milk set of A. osborni. At the same time he remarks the 

 unusual character of the deciduous canine in being two- 

 cusped. I think this set of teeth should be interpreted as 

 deciduous inc. 2 to deciduous pm. 4, plus the permanent 



