i68 PRIMARY FACTORS OF ORGANIC EVOLUTION. 



is distinct in all of them. Through the kindness of 

 M. Lohest I received casts and photographs of these 

 teeth, and I give here figures of the former (Fig. 47), 

 which are more satisfactory than those in the memoir 

 from which I have already quoted so fully, where, in- 

 deed, the grinding faces are not represented at all. 



The figures accompanying 1 show the large size of 

 the last superior molar, which exceeds in its propor- 

 tions those of the corresponding tooth in the chimpan- 

 zee. The fourth tubercle, or hypocone, is especially 

 large. In the male the crowns are more produced 

 posteriorly than in man generally, and remind one of 

 the character seen in the orang. The strong divergence 

 of the internal root of the last molar is shown in No. 

 2 a, and the corresponding character in a Maori and a 

 Fan from tropical Africa is shown in Nos. 3 and 5 a. 

 The quadritubercular crown of the last superior molar 

 of a Tahitian is shown in No. 4 a ; and the roots, which 

 are exceptionally fused nearly as much as in the typi- 

 cal Indo-European, are shown in No. 4. 



Dr. Eugene Dubois of the Army of the Netherlands 

 has recently published in Batavia, Java, in a brochure 

 in quarto, an account of some bones of an interesting 

 quadrumanous mammal allied to man, which were 

 found in a sedimentary bed of material of volcanic ori- 

 gin of probably Plistocene age, near a village called 

 Trinil. The remains consist of a calvarium which in- 

 cludes the supraorbital ridges and a part of the occi- 

 put ; a last superior upper molar, and a femur. The 

 tooth was found close to the skull and belongs probably 

 to the same individual as the latter, while the reference 

 of the femur is more uncertain, as it was found some 

 fifty feet distant. 



I From The American Naturalist^ April, 1893, 



