THE MOLLUSCA 213 



is fairly crammed with the needles, daggers, and stars of 

 flint, the indigestible portion of this curious diet. 



In localities where Doris is found there may always be 

 seen, during the summer months, conspicuously fixed 



Fig. 91. Dori* tubercitlata. ^ Natural size 



against rocks or boulders, curious white gelatinous rosettes, 

 about two inches in diameter. These contain the eggs of 

 this mollusc. The eggs are placed, four or five, within a little 

 spherical sac, and these sacs, in immense number, are em- 

 bedded in a gelatinous substance, in the shape of a 

 ribbon. 



The ribbon is about twenty inches long and one and a 



