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. West coast shells. A familiar description of the marine, fresh water, and land mollusks of United States, found west of the Rocky Mountains ... f an inch to an inch. Chlorostoma Pfeifferi, Phil., Klo-ros-to-ma fV-fer-i.In shape the shell of this rare species resembles theone shown in Fig. 64. It is conical, with whorlsperfectly flat ; the base is likewise flat and circular,and the umbilicus is large. Its color is light brown ;its length is sometimes more than an inch, and itsbreadth is the same. In Fig. 69 we have the representation of a morecommon Turban, or Chlorostoma, which name meansGreen-mouth, and refers doubtless to the greenishnacre within the aperture. This species is named Chlorosto-ma brunneum, Phil., brun-ne-um,and we will call it the Brown Tur-ban. When found alive, as it maybe, on the rocks at very low tide, oron the kelp if you have a boat,this mollusk has a handsome, richbrown shell, with a portion of white around theaperture. The base is flattened, the umbilicus isclosed, and the lines of growth are very oblique;while the edge of the outer lip is very sharp. Even the dead and worn shells preserve their brown. Fig. 69. 84. THE TURBANS. color remarkably, and can easily be told from thoseof the more common Black Turban. Old and over-grown specimens, an inch and a half long, aresometimes found, but one-half that length is morecommon. Chlorostoma aureotinctiim, Fbs., au-re-o-tink-tum,Gilded Turban. The shell of this species is similar in shape to Fig.69, but the whorls, instead of being nearly smooth,are banded by a few very heavy, rounded spiralridges, and wavy crossings. The shell is gray ornearly black; the umbilicus is large and marked witha bright yellow stain, which gives the species itsname. The shell is about an inch long. The Speckled Turban, Chlorostomagallina, Fbs., gal-li-na, is shown inFig. 70. ^ / It is about the size of the last spe-cies, and has a solid shell, mostly blackin color, but finely mottled with alighter shade, like the feath