70 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 97 



finer analyses are attempted, but for present purposes this segregation 

 into a smaller upper and later grouping of Playa de los Muertos cul- 

 tural materials (B) ; and a larger, lower, and earlier grouping (C) 



Fig. 17. — Outlines of vessels of the Playa de los Muertos culture obtained by 

 Dorothy H. Popenoe. Not to scale, a, burial 2 ; b, c, burial 4 ; d-l, burial 5 ; 

 m, burial 7. 



must suffice. Even such an arbitrary division suggests certain ceramic 

 trends within the period that may well be significant. 



The ceramic materials from B and C fall into six main wares or 

 ceramic subtypes based on surface finish or decorations (pis. lo, ii, 



