ORPHDDON 209 



Orphodon Ameghino 



Orphodon Amegh., 1895, Bol. Inst. Geog. Argen., t. 15, p. 658. 

 Orphodon Amegh., 1897, Bol. Inst. Geog. Argen., t. 18, p. 504. 



The teeth of this type are a mass of dentine, each sur- 

 rounded by a thin layer of cement, and each tooth subcy- 

 lindrical in section, with the crown worn to two apposed 

 oblique planes. The genus resembles Ortotherium. 



Fig. 137- Type natural size, after 

 Ameghino. 



Orphodon hapaloides Ameghino 



O. hapaloides Amegh., 1895, Bol. Inst. Geog. Argen., t. 15, p. 658. 

 O. hapaloides Amegh., 1897, Bol. Inst. Geog. Argen., t. 18, p. 505. 



In addition to the above, Ameghino gives a figure, here 

 reproduced, and the following measurements: Tooth, 

 greatest diam. 12 mm., lesser diam., 10 mm. 



14 



