1 6 THE NEW METHOD 



' ' Our lesson in shells today was upon the Natica 

 mamilla, a shell from the family of Naticadae, a fam- 

 ily which none of us ever has studied before. This 

 shell is a remarkably pretty one, for it is pure white. 

 The body whorl is very large in comparison with the 

 spire. The shell is less than an inch long, and it is 

 shaped like a semi-circle. It is quite thin at the 

 edge, but it becomes quite thick at the middle of the 

 body whorl. This shell may be found on the shores 

 of all the Islands north of South America, in the 

 Caribbean Sea." 



The Cypreae Reticulata. 



"This is a very pretty shell. It is found on 

 the coast of the Celebes Island, and all other East 

 India islands. The shell is about an inch and a 

 quarter in diameter and nearly four inches in circum- 

 ference. On the back of the shell there is a very 

 light green stripe running the whole length. In the 

 aperture there are short, brown ridges. The shell is 

 mostly covered with white spots and dark brown 

 stripes." ' James. 



"The Trochus niloticus belongs to the family of 

 Turbinidae. The spire is a perfect cone about three 

 inches long and two and a half inches broad at the 

 base. It has five whorls. It is a very beautiful 



