LIMX.EA. 



^23 



Limnophysa proxima^ Lea, prox'-i-ma. Spire 

 rather long and slender, lip reflexed, body-whorl 

 partly divided into small, flattened squares, like ham- 

 mered silver. The shell is nearly an inch in length. 

 The specimens described came from near Ogden, 

 Utah. It is also found near San Francisco, and else- 

 where in California. 



The next species, shown in Fig. iii, is named 

 Lini7iophysa (or LimncFd) pahistris^ Miill., pa-lus^- 

 tris. It is found all round the world — in 

 Northern Europe, Asia and America. The 

 whorls are rounded, five or six in number, 

 and the aperture is of moderate size, shorter 

 than the spire. The shell is horn-colored 

 like most of its relatives. It grows some- 

 times to considerably over an inch in 

 length. Among its varieties are elodes^ 

 Fig. III. expaiisa, Gabbi and Niittalliana. 

 Limncsa stagnalis^ Linn., Lim-ne^-a stag-na'-lis. 

 Fig. 112, is the largest of this class of fresh- water 

 moUusks, and is universally distributed, 

 both in this country and in the Old 

 World. It is a very distinct species, 

 and can instantly be recognized. Spire 

 very slender, body-whorl and aperture 

 very large; shell thin and delicate. It 

 grows sometimes to the length of nearly 

 two inches. This mollusk inhabits 

 lakes and rivers, and is found on the 

 Sierras, in Utah, and in many other 

 Fig. 112. localities. 

 LimncEa ampla^ jMighels, has a small, ver\' thin shell, 

 nearly globular in shape, and one-fourth of an inch 



