VERTEBRATE PALEONTOLOGY IN 191 3 647 



of evidence in regard to the affinity between certain carnivorous 

 (cynodont) anomodonts and mammals. For he describes and 

 figures, under the new specific name of Diademodon plaiyrhinus, 

 a lower jaw of an anomodont which is stated to furnish 

 evidence of a single successional replacement of the teeth 

 similar to that of mammals. " We may thus safely conclude," 



^- ««*&*. 



Fig. 4. — Skull, without lower jaw, of Ictidorhinus martinsi. 



(From Bull. Amer. Mus. Nat. Hist.) 



he observes, " that as the cynodont approaches full maturity 

 the incisors, canines, and premolars are replaced as in mammals, 

 and as no completely adult specimen has ever shown any trace 

 of a later succession, we may conclude as probable that there 

 is only a single succession." 



New carnivorous South African anomodonts of the group 



FlG. 5. — Skull of Scymnognathus angusticebs. 

 (From Bull. Amtr. Mus. Nat. Hist.) 



Therapsida form the subject of an article by Dr. Broom (Bull. 

 Amer. Mus. Nat. Hist. vol. xxxii. pp. 537-61) in which four 

 species are described, one referable to a new genus, under the 

 name of Ictidorhinus martinsi. Of the latter the skull (fig. 4) 

 is altogether unique in shape ; the peculiarity being in great 

 part due to the unusually large size of the orbits, and the 

 42 



