86 



OTHER TURBAN. 



The former has a furrow and keel near the suture, 

 while the variety has neither; southern. 



Liotia fene strata, Cpr., L,i-o'-shi-a fe-nes-tra'-ta, has 

 a small, flattened, whitish shell, cut into numerous 

 little square pits, by the crossing of ribs and lines. 

 Its diameter is one-eighth of an inch. 



Liotia a at ticostata, Cpr., a-cu-ti-cos-ta'-ta, is smaller, 

 less flattened, and is marked with sharp, spiral ridges, 

 but without cross-lines ; whitish. 



Fig. 72 represents a fine shell which is common on 



Fig. 72. 



the southern coast. Notice its flattened form, small 

 spire, deep umbilicus, ample aperture and shaggy 

 operculum. The name is Trochiscus Norrzssi, Sby., 

 Tro-kis'-kus Nor-ris'-si. 



The shell is quite smooth, and of a rich, brown 

 color; the rim of the umbilicus, curiously enough, 

 is tinted with bright green. The diameter of the 

 shell of this very distinct species is two inches or 

 less, hence our engraving represents a large specimen. 



A big, strong, brick-red shell, considerably resemb- 

 ling Fig. 75, is frequently picked up along the shores 

 of central California, though, in fact, it has a much 

 wider range. It is the shell of the Pachypoma gib- 



