This Chumash pictograph is located in the area of Point Mugu in the Santa Monica Mountains. In this section of the pictograph panel, the main figure has what appears to be a severed right hand. The following excerpts are from Campbell Grant’s book - ‘The Rock Paintings Of The Chumash, and have, I believe, some bearing on the content of this particular section of the panel.
Campbell ( 1993, p. 42, 43) wrote:
The Spanish found the Chumash gentle and friendly. Compared to the savage Plains Indians, they were not a particularly warlike people but there is evidence of a good deal of intervillage fighting and possibly some intertribal warfare.
There is an account by a Mugu Chumash that a Tejon woman married a Mugu man and came to live on the coast. She was unfaithful to him and was killed according to the Mugu custom by being shot to death with arrows and her body burned. About four hundred Tejon Indians came over the mountains to avenge the death of the woman, and in the battle over seventy were killed.The Mugu Chumash, according to this source (Bowers, 1897), did not take scalps but cut off the right hand of the slain warriors.