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.