Less abundant. Similar in distribution. More slender and of a lighter pigmentation. _Lepidasthenia gigas_ Johnson. This interesting form was taken from a large mass of the tubes of _Vermetus_ (_squamigerus?_) (gasteropod). Heretofore, as far as I know, it has only been recorded as a tube commensal with a large _Amphitrite_. My specimen was not commensal, but was hidden among the mollusc tubes. The color was recorded as a "light, unsaturated yellow, elytra darker yellow, body irridescent below." The setæ project only their tips beyond the parapodia, differing only in this respect from Johnson's figures. I could not find any asymmetrical somites, judging from the elytrophores. The elytra were all gone and the specimen was poorly preserved. _Harmothoe hirsuta_ Johnson. A single specimen 25 mm. long, badly mutilated and in a poor state of preservation was taken in seaweed between tide-marks. Two other species were taken from a similar location, but I have not identified them yet. Phyllodocidæ Three unidentified kinds inhabiting seaweed tangles and holdfasts are in the collection. Euphrosynidæ _Euphrosyne aurantiaca_ Johnson. Nereidæ Are common in the atokous state, and one "heteronereid" was brought in from an unknown location. _Nereis agassizi_ Ehlers. Specimens which agree closely with figures by Johnson are found very abundantly in seaweed tangles. _Nereis virens_ Sars. A single specimen was taken in wave-washed sand three miles south of the Laboratory. There is another species, resembling _Nereis procera_ which I have not yet identified. Two specimens of this beautifully brilliant orange annelid were taken on holdfasts. Eunicidæ I found few of these, but such as I did find were in burrows in a soft shale ledge or in sand under large stones. Lumbriconereidæ _Lumbriconereis erecta_ (?) Moore. I am not sure of this determination. The setæ are identical, but the parapodia are not quite the same as those figured by Moore. The worm is very abundant in the sand under large stones. One or two similar species are common in seaweed and under mussels. Glyceridæ Two species of this family were found in the sand under large stones. _Hemipodia borealis_ Johnson. Found under a large rock, buried in the sand. One very large and active glycerid was found in the same locality. I have not identified it. Cirratulidæ Found in the roots of eel-grass, in holes in a soft shale ledge or in the sand under large stones. _Cirratulus robustus_ Johnson. _Cirratulus spirabranchus_ Moore. Found in abundance in the above places. Terrebellidæ Found with the _Cirratulidæ_. _Schmardanella californica_ Moore. Is very abundant in the matted roots of "eel-grass." Two other forms are quite abundant wherever _Cirratulus_ is found. Maldanidæ Found on holdfasts. _Clymenella rubrocincta_ Johnson. Fairly common. Chlorhæmidæ