96 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 
