74 THE DESEADO FORMATION OF PATAGONIA 



Propachyrucos smithwoodwardi Ameghino 



P. smithwoodwardi, Amegh., 1897, Bol. Inst. Geog. Argen., t. 18, p. 425. 



We did not find this 

 species, but I reproduce 

 Ameghino's figure of it, 

 natural size. The length 



Fig. 42. P. smithwoodwardi after Ameghino, right of the ddltition from inc. 

 mandible — natural size. . i • i 



I to m. 3 is 41 mm., height 

 of mandible under m. 1 is 12 mm. 



Propachyrucos aequilatus Ameghino 



P. aequilatus, Amegh., 1901, Bol. Acad. Nac. Cienc. Cordoba, t. 16, p. 371. 



This species is based on the anterior lobe of each lower 

 molar, being longer than the posterior. In size, molars 1 

 to 3 measure 24 mm.* 



Phanophilus Ameghino 



Panophilus, Amegh., 1903, Anal. Soc. Cienc, Argen., t. 56, p. 202. 



This genus is based on isolated upper molars, charac- 

 terized as similar to Proty pother ium, but having a pro- 

 nounced median vertical column, instead of a groove on 

 the external face of the upper molars, a character unique 

 among typotheres. The position of the genus with this 

 scant information is uncertain. One species is described, 

 P. dorsatus. 



Phanophilus dorsatus Ameghino 



P. dorsatus, Amegh., loc. cit. p. 202. 



In our collection, two isolated upper molars of this un- 

 usual form occur, corresponding in size and pattern to the 

 one described by Ameghino. The external column, as 



*P. crassus has been described, (loc. cit., p. 425,) based on pm. 2 and 3, of 

 larger size than either of the foregoing but I do not think that the genus can 

 be determined on so small a fragment. 



