Eudistoma diaphones Ritter and Forsythe
This was the common compound species found closely attached to the lower sides of stones. It was often quite extensive but not thick or colored.
Eudistoma psamion Ritter and Forsythe
Great masses of this tough, pinkish or slightly colored form were found under rock ledges. It resembles one of the sponges in general appearance and is found in among sponges and polyzoans. This was one of the most bulky forms which we found.
Glossophorum planum Ritter and Forsythe
Irregular masses of this species were found under rock ledges and under stones. Our specimens are largely covered with sand grains.
Distaplia occidentalis Ritter and Forsythe
This compound stalked form was found on a rock ledge at low tide near Salt Creek.
W. A. H.
(Contribution from the Zoological Laboratory of Pomona College)