PHYLA OF THE TITANOTHEEES 



405 



YII. DolichorliintTe, mesaticephalic to dolicho- 

 cephalic, limbs, so far as known, ab- 

 breviate. 



VIII. Menodontinae, mesaticephalic to dolicho-- 

 cephalic, with abbreviate, triangular 

 horns, with incisor teeth reduced or 

 wanting, feet and limbs elongate. 

 IX. Brontopimie, brachycephalic, horns abbre- 

 viated, rounded or oval, incisors per- 

 sistent. 

 X. Megaceropinfp, mesaticephalic to extreme 

 brachycephalic. horns elongate, verti- 

 cally placed, no incisor teeth, 

 XI. Brontotheriimie, mesaticephalic to brachy- 

 cephalic, horns elongate, transversely 

 flattened and divergent. 



Doliclwrhinus, 

 Mesatirliinus, 

 SplienocoBlus, 

 Metarhinus, 

 Rhadinorhiniis 

 Menodus (= Ti- 

 tanotlierimii) , 

 Allops 



Broil tops ( =-1/ c(/- 



aceratop.s), 

 Diploclon us 

 Megaccrops 



{:^Syml)orodon) 



Brontotherium 



The free use of subfamily divisions to express the distinct phyletic 

 series is similar to that which the author has adopted in the phylogeny 

 of the rhinoceroses. More conservative usage would divide the titano- 

 theres into four subfamilies only. 



