36 BUREAU OF AMERICAN ETHNOLOGY I bull. 74 



floor P. The southern side is marked by a line of worked stones 

 which extend into the central excavation (pi. 1, 4, and sec. c-d). 



Floor Q. — This is a third floor on a different level in Tunnel /. It 

 is 0.3 m. below P and 0.15 m. below R. The southern side is seen 

 at the entrance to Tunnel / from Tunnel c and is here marked by a line 

 of worked stones, a continuation of those forming a side of Floor R. 

 Q', in Tunnel ^, is probably a part of the same floor and is separated 

 from Q by the higher and narrow Floor P ^ The eastern edge of Q' in 

 Tunnel g is clearly marked by a sharp rise in the floor level seen in 

 most cases at the edge of a room. A part of the western side of Q' is 

 seen in the tunnel connecting g and A, which also shows the sharp 

 edge of the higher Floor P^. The Floor Q and Q' indicates more 

 nearly the floor of a room than any of the other floors under the Main 

 Structure. 



A floor of tepetate is noted in Tunnel d (pi. 2, sec. i-j) on the same 

 level as Floor Q. A small piece of floor (S, pi. 2, sec. g-h) under P* 

 should be noted. This was found in Pit XVII. Its limits were not 

 ascertained. 



No floors were found in Tunnels /, 7, and m. It is also well to note 

 that no floors were found under the Patio Avith the exception of P 

 on the western side. 



Niches in Tunnels e^ h. — In the northern wall of Tunnel e (pi. 2, 

 24) and again in the western Avail of Tunnel h (25) a curious niche- 

 like construction was found. A squared stone, 0.45 by 0.45 m., formed 

 the base of the depression in Tunnel e. The Avails, composed of 

 small stones set in adobe, met 0.52 m. above the stone, making a sort 

 of beehiA^e-shaped cubicle. This contained nothing. These two 

 niches were found almost exactly under the Avestern edge of Floor D 

 in Room II. It is suggested that possibly the western side of D was 

 at one time the extent of the Main Structure and these cubicle open- 

 ings were on the side of the outer Avail of the building upon the 

 Western Terrace. There are tAvo other pieces of evidence Avhich may 

 go to show that the floor of the Terrace on the west Avas Avider than 

 is now indicated. Floor T, in the northern end of Tunnel A. is on 

 the same leA-el as the floor of the Terrace and of the same composition. 

 In Pit XVIII (pi. 2, sec. k-l) a floor (27) of the same level as that of 

 the Terrace is found running under the western Avail of Room II. 



As already pointed out (p. 19), the lowest Tunnel, y, running 

 from Pit XXI on the west to Pit XVII and Tunnel z branching 

 from y and running into Pit XXIV show no floors of any kind. The 

 only remains found in these lowest excavations consisted of a square 

 piece of tepetate 0.7 by 0.7 by 0.5 m. near the top of the wall in 

 Tunnel y. 4.5 m. east of Pit XVII, together with a few shards and 

 one pottery head. 



