GRADE II. 



The IylTTORINA SNAIIv. 



' ' It lives in shallow water around every sea north 

 of the equator. The shell is quite pretty. It is nearly 

 an inch long and half as wide. The body whorl is 

 yellow, and is covered with rows of little ridges. The 

 apex is very sharp, and is of a dark yellow color. The 

 aperture is round and one side of it is light green. 

 The inside of the shell is white, and I can see some 

 parallel, raised lines there. The snail is a very slow 

 one, for it can go only four inches a minute. It is an 

 herbivorous snail, for it eats nothing but sea- weeds." 



Ima. 



The Cypraea Onyx. 



"The general color of this shell is brown. The body 

 whorl is light brown, with a spot of white on the back 

 near the middle. On the body whorl near the aper- 

 ture there is a stripe of dark red. One part of the 

 stripe is light brown. The aperture is quite wide. 

 The outer lip is dark brown, and there are seventeen 

 teeth on it. The teeth are red and the spaces be- 

 tween them are dark brown. 



' ' This shell is found in the shallow water of the 



