Best-laid plans

This afternoon I was checking on a few things along the rocky shore when from a distance I noticed something that looked like a bright yellow pine cone.  I realized that wasn't what it was, but I couldn't identify it until I got closer:

 

This is a cluster of Leafy Hornmouth (Ceratostoma foliatum) egg capsules.  There are two large grayish snails below the yellow capsules — those are the Leafy Hornmouths.   Although we have found their egg capsules occasionally (see the post called "Fluted" from 11 February 2014), I don't recall seeing the snails in the process of laying eggs on Bodega Head before, so it seemed worth documenting.

P.S.  The smaller yellowish snail is a different species, Paciocinebrina lurida (formerly Ocinebrina lurida).  There are other interesting invertebrates in this image, so look around!