The sand crabs of the genus _Eremita_ were found laying their eggs all summer. Some hundreds were examined, and it was found that up to September egg masses were nearly always found with the females. In the whole season, out of 236 examined, only 11 in September were without eggs. It was found that while the eggs on the swimmeretts were developing into crabs another egg mass was being formed in the ovaries, this last reached maturity about the same time that the young crabs on the swimmeretts hatch. A species of _Cypris_ was found in a pool about 1½ miles up Laguna canyon. These had many eggs on July 1; by July 17 no eggs were found. A number of species of isopods and amphipods were found to have eggs during the summer, and during September it was very easy to obtain _Ligyda_ with eggs or young, although the proportion of young stages was becoming less. Members of the genus _Caprella_ were found with eggs at different times during the summer and up into the fall. 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_) Preliminary Notes on Some Marine Worms Taken at Laguna Beach W. F. HAMILTON During the summer of 1914 I made a collection of some 230 bottles of annelids. It was thought best that I should publish a list of the families and of such species as I have succeeded in identifying. Polychaeta Syllidæ Are quite abundant among the finer sea mosses. _Pionosyllis elongata_ Johnson. Found among goose-neck barnacles west of the Laboratory and in seaweed tangles. White with bright red eggs coloring posterior end. Taken June 26, 1914. Two other forms are common in the finer sea moss. Polynoidæ Are of frequent occurrence on rocks and in seaweed tangles. I have identified four species. _Halosydna insignis_ Baird. The most common and variable polynoid at Laguna. Color of elytra yellowish gray to bright red. Length from 18 to as much as 47 mm. (contracted). _Halosydna californica_ Johnson.