Looks like a new tail growth.
About 5 to 6 inches long.
On north facing slope of Bell Canyon Park area.
(aka Ice Plant)
An S. niger was observed outside of a portion of Occidental College's campus known as "The Cooler." It was likely eating discarded food.
Small black spider. About half the size of a penny. Black and white bands on its legs. A red-orange almost heart shaped mark on the top of the abdomen. Large green chelicera.
I'm assuming it was a juvenile bold jumper based on its color and small size. I didn't see it jump at all, but it did rear back and raise its two front legs (not the pedipalps) in a defensive/aggressive posture.
Maybe Silver Lupine, but not sure. Bushes are along path to Limantour Beach.