CHAPTER XVIII. 



I^and-Shells — Amber-Snails — The Pupas — La Bril- 

 LANTE — Nature of the Helices — Euparypha — Ari- 

 onta — The Monterey Snail — The Coast Species — 

 Island Snails. 



NOW tliat we have left the water, both salt and 

 fresh, and are setting out for explorations on the 

 dry land, we will approach our new field of oper- 

 ations rather gradually, and will first examine those 

 mollusks which lurk in damp places, though they 

 seldom venture into water. The very nature of mol- 

 lusks renders them fond of moisture, and during our 

 diy^ summers they are obliged to suspend active oper- 

 ations, and either retire into their shells and close up 

 the opening, or else buiy^ themselves in the earth and 

 wait for the welcome winter rains. They breathe 

 by means of a simple lung or air-sack, which 

 usually opens on the right side of the body, as is 

 plainly shown in the picture of the slug, Fig. 135. 



We will begin with an Amber-snail, Succinea Hay 

 deni^Vsl. G. Binney, Suk-sin'-e-a Hay^-den-i, Fig. 118. 

 The Amber-snails are rather small mollusks, which 

 love moisture, though they do not often enter the 

 water. The amber-colored shell of this spe- 

 cies is long, thin and few-whorled. The 

 aperture is very large, and from its base you 

 can look inside the shell to its ver\^ apex. 

 The spire is small and consists of about three 

 delicate whorls. The length of the whole 

 shell is three-fourths of an inch. From 

 near Salt Lake, Utah. 



