60 BULLETIN, PUBLIC MUSEUM, MILWAUKEE. [Vol. III. 



This mound contained an animal sacrifice incased in an intensely 

 black charcoal earth, representing possibly an original covering. 

 This fact may give color to the theory of Lapham that the animal 

 sacrifices at Aztalan were incased in a coating of clay or other 

 material before being burned 15 . This sacrifice was underlaid by the 

 usual yellow ceremonial sand. Similar animal sacrifices were found 

 in three other corneals, Nos. 13, 14 and 31, in this group. In Nos. 

 13 and 14 the position of the sacrifice was near the bottom of the 

 mound, while in Nos. 7 and 31 it was near the top. The former 

 were large, high conicals while the latter were small and low, which 

 may have influenced the positions of these sacrifices. These four 

 mounds contained no burials. This suggests that these special 

 mounds were erected to give places for these sacrifices of animals, 

 just as certain other conical mounds were devoted to the cremation 

 of human remains and of sacrifices. Such special mounds were 

 placed adjacent to those containing the burials, just as this sacrifice 

 may have been placed here in connection with the burials in mounds 

 Nos. 5 and 8. 



The stratification of this mound, as in all those containing animal 

 sacrifices, was more complex than that of the ordinary conical. It 

 was as follows : 



Surface loam 21.28 



Fire pocket containing animal sacrifice 19.06 



Dark yellow sand 18.48 



Light yellow sand 18.38 



Whitish sand 17.28 



Bottom of Mound : 



Red sandy clay 16.28 



Mixed sandy clay 15.78 



Red sandy clay 15.68 



Mottled sandy clay 15.28 



Fine yellow sand 14.28 



Mottled sandy clay 13.68 



Golden streaked sand 13.08 



Quicksand 12.88 



These strata were taken down to the quicksand 8.4 feet below 

 the top of the mound. The artificial strata, however, did not descend 



15 Op. cit. p. 44. 



