16 Bulletin Wisconsin Natural History Society [Vol. 11, Nos. 1-2 
rainy days the rock- and Jonah-crabs ( Cancer ) came up to feed 
(fig. 8); crane-flies, Parydra, and beetles were of frequent occur- 
rence. 
Beneath the shelter afforded by the matted algae many animals 
attached themselves to the rocks. Anemones replaced the bar- 
nacles in many places (fig. 9) and often formed veritable carpets 
in little crevices; Clava sometimes did the same. Sagartia was 
found at higher levels than Metridium. Purpura and its egg cases 
Fig. 9. Metridium marginatum Growing on Rocks with Balanus, Mytilus , 
etc., Beneath Ascophyllum. 
(figs. 10, 11) were abundant on vertical walls or under overhang- 
ing shelves. The ubiquitous Mytilus and Littorina litorea were 
everywhere; Littorina palliata and Acmaea (fig. 11) were less com- 
mon. Sertularia commonly grew attached to the rock and in 
exposed localities, like Station 8. Obelia, Bryozoa and Chondrus 
crept up under the Ascophyllum from the strata below. Small 
Nemerteans swarmed in this zone at Station 9. Modiola was 
often encountered at the lower edge of the Ascophyllum. 
