410 HEAN. 



A peculiarity of the bones of the skull in the form of a ridge on the 

 bone about the size of the linger and extending from mastoid to mastoid 

 around the occipital region, was noted frequently; in two persons, both 

 of the Iberian type, it was well marked. This ridge apparently followed 

 the superior curved line and crossed the external occipital protuberance, 

 terminating on each side in the mastoid process. It occuri'ed on 12 

 Iberians, 3 Blends, 2 Australoids, 2 Alpines, 1 Cro-Magnon and 1 B. B. B., 

 21 times in all. The accompanying head outline illustrates this pro- 

 jection over the occipital protuberance, which itself was not large but 

 seemed continuous with the ridge (fig. 11). Future studies of skulls 

 may reveal the nature of this abnormality, because it was not superficial 

 but appeared to be bony in character. 



III. T>IE SEGREGATION" OF TYPES. 



In previous papers concerning the Filipino Types found among the 

 Manila Students(4) and in Malecon Morgue(5), the suggestion was 

 made that the types represent species, of which there are elementary or 

 new, and systematic or old, present in both groups of individuals as well 

 as among the Igorots and Japanese. The Primitive and Iberian are 

 called systematic species, the Alpine, B. B. B., Modified Primitive, and 

 Adriatic, elementary species, and the Australoid and Cro-Magnon, system- 

 atic species also, but not so definite as the Primitive and Iberian. The 

 reasons for this classification and for the use of the word species have 

 already been given in relation to Schulls'(J:) work on corn, and the 

 work of Price and Drinkard on the tomato (4). 



The species of men at Taytay may be selected by the same method 

 used to select those of. the students and in the morgue. The species so 

 selected are then differentiated as follows: 



The Primitive is bracliyceplialic, platyrrliiue, and small in stature. 

 . The Iberian is dolichocephalic, leptorrhine, and below medium size. 



The Australoid is dolichocephalic, platyrrhine, and small or below medium size. 



The Cro-Magnon is dolichocephalic, platyrrhine, and above medium stature. 



The Alpine is brachycephalic, leptorrhine, and below medium size. 



The B. B. B. is brachycephalic, leptorrhine, and above medium size. 



The Modified Primitive is brachycephalic, platyrrhine and below medium 

 stature. 



The Adriatic is brachycepahlic, platyrrliine, and above medium stature. 



The Blend is moderately brachycephalic, moderately platyrrhine and small in 

 stature, corresponding with the Primitive and Modified Primitive more nearly 

 than with any other type. 



THE PRIMITIVE. 



Only three individuals of this type were observed among the men at 

 Taytay, although a majority of the Blends conform to the Primitive. 

 The three men are characterized by a stature of 1-50.1 centimeters, a 

 cephalic index of 88.5 and a nasal index of 89.1, in addition to which 

 may be given the Tnorphologic face index 78.5. the omphalic index 44.1, 



