Of the pycnogonids, the following genera were found with eggs during the summer: Lecythorhynchus, Ammothella of two species; Halosoma, Pycnogonium, Palene, Tanystylum of two species.
A number of chitons were examined, but with negative results. Probably many were young.
Some of the bivalved forms were examined, but the character of the period of reproduction is not yet determined.
The sea hare, Aplysia, laid its eggs in the aquarium jars during the middle and late summer.
Many of the species of nudibranchs collected during the summer were found to deposit eggs in the laboratory. One species, a light brown form, was found abundantly in kelp holdfasts. They laid coiled ribbon-like masses of eggs.
Eight different individuals of the genus Doris deposited eggs in the laboratory.
On July 28, two of the genus Hermissenda and one Spurilla (?) deposited eggs.
Laila and several unknown forms deposited eggs in the laboratory during the first part of September.
(Contribution from the Zoological Laboratory of Pomona College)