A WALK ALONG THE SHORE. 



99 



Figure 51. 



Red Turbans, 



we have already considered, so 



we pass on to a group of strong, 



black shells whose owners have 



met together on the sheltered 



side of a big rock. They are the 



Turban-shells, and there are va- 

 rious species of these, also, 



Black Turbans, Brown Turbans 



and Blue Turbans, as well as others which you 



do not often find. 



The Black Turbans are by far the 

 most numerous. You see a picture of 

 one in Figure 50. Their shells are 

 strong and heavy, enabling them to 

 resist the knocking of the waves. In- 

 Figure 52. side, they are beautifully pearly, like 



the abalone. The aperture is closed by a circular, 



horny front door. 



The little black animals are vegetable-eaters, 



like the littorines, and they as- 

 sist greatly in keeping the rocks 



clean and fresh. 



A little nearer the water are 



the Brown Turbans (Figure 51). 



In fact, they seldom come up far 



from the lower tide limits, though 



you may find them alive in caves Figure 53. 



