692 PICTURE-WRITING OF THE AMERICAN INDIANS. 
the eyes belonging to a human face, may be compared with the so- 
called Thunderbird from Washington, contributed by Rey. Dr. Eels 
(see Fig. 679). 
Dr. E. R. Heath (b), in his Exploration of the River Beni, introducing 
Fig. 1113, says: 
Periquitos rapids connects so closely with the tail of ‘ Riberdo” that it is difficult 
to say where one begins and the other ends. Our stop at the Periquitos rapids was 
short yet productive of a few figures, one rock having apparently a sun and moon 
on it, the first seen of that character. 
Fig. 1113.—Brazilian petroglyphs. 
He further says: 
On some solid water-worn rocks, at the edge of the fall, are the following figures 
[Fig. 1114]. There were many fractional parts of figures which we did not consider 
of sufficient value to copy. 
SS 
Ho 
© 
Fig. 1114.—Brazilian petroglyphs. 
SECTION 2. 
HOMOMORPHS AND SYMMORPHS. 
It has already been mentioned that characters substantially the 
same, or homomorphs, made by one set of people, have a different 
Signification among others. The class of homomorphs may also em- 
brace the cases common in gesture signs, and in picture writing, similar 
to the homophones in oral language, where the same sound has several 
meanings among the same people. 
