THE VARIETIES OF THE HUMAN SPECIES. 



55 



resembling a protuberance, though not so pronounced as to con- 

 stitute a crista or a lophos ; if these two characteristics are found, 

 the sph. is cristatus or lophoides (Fig. 48). 



Fig. 48.— Sphen. Cristatus. 



VI. Sphaeroides. — I have given the principal variations of this 

 variety, that is : 



a) sphaerotocephalus ; 



b) sphaeroides, hemisphaeroides ; 



c) strongyloceplialus (see above). 



VII. Byrsoides. — So far I have only found one variation from 

 the sicidiis, that is, the aegyptiacus, which is a little narrower (see 

 above). 



VIII., IX., X. Parallelepipedoides, Cylindroides, Cuboides (see 

 varieties). 



XI. Trapezoides .—1 have already distinguished two subvarie- 

 ties with the names of Trap, sardinicnsis and Trap, africus. 

 These are the most typical and commonest variations; in my cata- 

 logue of Russian varieties several other secondary forms are 

 found, of which the commonest is trap, rotundatus. 



There is a subvariety which I considered during my first obserT 

 vations as a distinct variety, and which I had named Pyrgoides, 



