ORDINAL TYl'KS OF MOLAKS : I'KIMATKS 



159 



Fig. 137), that a special cusp is developed, to which we have given 

 the name protostyle, from its proximity to the prolix-one. 



From a recent paper by I*. Adloft' 1 we learn that this was originally 

 designated by Carabelli as occasionally occurring in the human molars, 



Fir,. 130. Upper (A) and lower (A 1 , A'-) teeth of Anaptomorphus homv.nculus. (Cf. Fig. 129.) 

 The upper teeth are tritubercular, in the lower teeth the paraconid is seen to be much 

 reduced, x. 



and hence named by him tnltarnlus anomal/'s. Batujeff regarded this 

 as a progressive structure, pointing out (1) that the tuberculus anomalus, 

 while most frequently found on the first upper molar, is also occasionally 

 found on the second and third molars ; (2) that it is more frequently 



FIG. 131. Origin of the hypocone from the basal cingulum, as shown in l,nl , w,i >,,<///-,x, a Basal 

 Eocene (Torrejon) Primate (?) of uncertain relationship. > y. 



observed in higher races than in lower races, to which Adloff adds, 

 (3) that among recent and extinct anthropoid apes the tuberculus 

 anomalus is certainly not present. 



Adloff' in this connection calls attention to the anomalous detach- 

 ment of cusp components of the human molar crown as evidence of 



1 "Zur Frage nach der Entstehung der heutigen Saugethierzsahnformen," Ztitschrift ./'. 

 Morphologic u. Anthropologie, Bd. V., pp. 357-384. 



