98 SOCIAL EVOLUTION 



The tomb is composed of several megaliths one for tin- 

 floor, others upright or on edge, supporting a horizontal 

 slab which covers the whole space enclosed. 48 Some of 

 these sepulchral chambers are covered with great piles 



'Uitnrl n-Arrh*r.|-*Je PrfhUt..ri.,u, " 



FII.I-RK -HI. Neolithic Monuments, a "Dolnu-n." 



of stones or earth. These monuments are known as bar- 

 rows. This was the period when the Swiss lake* dwell- 

 ings were constructed. 49 The prehistoric monuments of 

 the New "World are more imposing than these barrows 

 of the Old World. 50 The ruins of palaces, temples, and 

 aqueducts of the ancient Peruvians and the similar colos- 

 sal constructions of the ancient inhabitants of Bolivia 

 and Mexico, surpass most of the other monumental re- 

 mains of prehistoric man. But the men of the Neolithic 



"See figure 46. 



Keane, op. cit., p. 121, Lubbock, Pre-Historic Times, ch. vi. 



wSee figure 47. 



