EXPLANATION OF PLATE II. 



Fig. 1. Egg masses of Haminea vircscens, showing method of at- 

 tachment to rocks. About natural size. 



Fig. 2. The arrangement of the spiral'loops of a small portion of 

 the egg case. 



Fig. 3. The ends of two loops showing the details of the arrange- 

 ment of the double rows of eggs. Each egg surrounded by a 

 gelatinous covering. 



