. West coast shells. A familiar description of the marine, fresh water, and land mollusks of United States, found west of the Rocky Mountains ... Fig. 136, and the accompanyingdescription. Psephis tantilla, Gould, Se-fis tan-til-la. Thelength of this little shell is only about one-eight ofan inch, but it has some quite distinctive marks bywhich it may be identified. Its shape is somewhattriangular, its surface very smooth and bright, itscolor white or brownish, with an internal purplespot near one end. It reaches Puget sound on thenorth, and is probably found along the whole westerncoast of th
. West coast shells. A familiar description of the marine, fresh water, and land mollusks of United States, found west of the Rocky Mountains ... Fig. 136, and the accompanyingdescription. Psephis tantilla, Gould, Se-fis tan-til-la. Thelength of this little shell is only about one-eight ofan inch, but it has some quite distinctive marks bywhich it may be identified. Its shape is somewhattriangular, its surface very smooth and bright, itscolor white or brownish, with an internal purplespot near one end. It reaches Puget sound on thenorth, and is probably found along the whole westerncoast of the United States. Chione simillima, Sby., Ki-o-ne si-mil-li-ma, is aspecies found on the southern coast. The valves ofthe shell are very thick and strong, and are finelysculptured in both directions. The radial lines arerounded, while the concentric ones are sharp andthin. At the end of the shell is a conspicuous cor-date lunule; on the top is a broad depression, and atthe base of this is the external ligament. The car-dinal hinge-teeth are three in number, the pallial linealmost entire, showing that it is not a deep burrower. CHIONE. The color is brownish white, deeply stained insidewith purple; length two inches or less. Chione succincta, Val., suk-sink-ta, is a similarspecies. In Fig. 159 we have aview of the distinct, cordate lunulewhich is so conspicuous a mark ofthis shell. In general form and size it res-embles the last species, but ismarked by less frequent concentricridges. The shell is white, strong,and heavy. Chione fluctifragax Sby., fluc- tif-ra-ga. Shell very strong and Fig. 159- heavy, valves nearly circular when young, and sculptured into a network. When older, the shell becomes somewhat triangular and the latter part is prolonged. There is no distinct lunule as in the other species;the ribs and lines are rounded, and the edges aremarked with fine crenulations. Externally the shellis dingy, but it is pure white within, with purplespots at or near the muscle
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectmollusks, bookyear188
