1887] Conventionalism in Ancient American Art. 717 
In the series represented in Figs. 5 to 8 the conventional evo- 
lution of the mouth is shown. In Fig. 1 we have the realistic 
mouth, but in Fig. 5 a second, beak-like mouth has been inserted 
in advance of the regular mouth, with its armature of teeth, 
Behind the true mouth are deep lines cut in the clay, as if to 
Y 
hiiu l ri 
Fic. 8. 
give emphasis to the jaws. The pectoral and ventral fins are 
Still of a realistic type, but the caudal is represented by a rounded 
knob. In Fig. 6 the mouth is represented by a projecting mass 
of clay above the opening in the foot, in which are deep lines 
Corresponding to those of the last figure, while the grooved. 
Patch on either side of the opening represents the pectoral fins. 
