9 6 



THE DESEADO FORMATION OF PATAGONIA 



canine is marked as a groove, later as a pit, and still later 

 is lacking altogether, as is the case in the specimen figured, 

 for all three of my more complete specimens are old indi- 

 viduals, as is also Ameghino's type. All the incisors show 



Fig. 53. Dorsal view of skull 1/2 natural size. 



the cingulum near the base of the enamel. On account of 

 the development of the cingulum on the inner anterior cor- 

 ner of the premolars, these teeth are broadened out and 

 overhang the palate in a marked degree, and are also much 

 wider than long. Molar I is intermediate in character 



