/ L 



other vacation resorts, where they are sold at prices varying from 

 a few cents to a dollar each, according to quality. 



Another rock shell, Murex erinaceus, is the cause of much damage 

 to the oyster beds of Europe. It is assiduously hunted by the fisher- 

 men who kill vast numbers by cutting off the foot and the operculum, 

 after which the animal is allowed to die. The Murex kills the oyster 

 by boring a hole in the apex, in the same manner as the drill, which 

 is also a member of this family. The Murex family also includes the 



purple shells (Purpura), which are handsome shells 

 found in many parts of the world ; the castor-oil shells 

 (Ricinula), which live in the warm seas of the Indian, 

 Pacific, and Atlantic oceans, and the unicorn shell 

 (Monoceros), which lives on the coast of California. 

 It is remarkable for the presence of a long, sharp 

 Rcnucus. tooth on the lower edge of the outer lip, whence the 

 which lives in China. Q ree k na me, Monoc&ros, signifying one horn. These, 

 (W odward as well as others of the family, are very interesting 



shells, as you will find when you study them more fully." 



The Professor ceased speaking, and as we assured him of our appre- 

 ciation of his efforts in our behalf, we arose from our seats, intending 

 to leave him, lest we should presume too much upon his kindness 

 and willingness to assist us ; but the rain came down more heavily, 

 and the Professor urged us to remain. If you are not too tired 

 said he, " resume your seats, and we will proceed with this fascinat- 

 ing subject, and I will give you a little talk on marine snails : you 

 find them half as interesting as they seem to me, another hour will 

 pass rapidly, and by that time I think the storm will be over. 



114 



