possibly Nucella lamellosa

The plant is blocking most of the tail, but the if you look carefully, you can see the yellow-tipped tail.

Note the incomplete molt of the eye cap or "retained spectacle".

Some of the fattest clams I've ever dug. And NO cracked shells :) !!!!!

Male

at the Washington Park boat launch

Notice how the front legs are well-developed but the back legs are still very small buds

Stinky Bob