MISS S. P. HUGHES
PACIFIC UNIVERSITY, FOREST GROVE, OREGON
Five species of barnacles were found last summer at Laguna Beach. For the identification of the first two of these, we must thank Dr. H. A. Pilsbry of the Academy of Natural Sciences, Philadelphia.
Figure 1
Balanus tintinnabulum californicus Pils. Fig. 1
The most common of the acorn barnacles; found abundantly on rocks, mussels, etc. There are six valves or plates; the rostrum, carina, and two latera on each side. These plates are delicately marked with pink stripes. The connecting pieces are often transversely lined. This is the largest of the common acorn barnacles; the average height is about an inch.
Figure 2