. West American shells; a description in familiar terms of the principal marine, fresh water and land mollusks of the United States found west of the Rocky Mountains, including those of British Columbia and Alaska ... pire winds gracefully up-wards, and ends in a sharp point at theapex; while at the other end of the shell theaperture is small, and ends in a short, re-curved canal. Following the sutures is aspiral thread of beads, which adds much tothe attractiveness of the shell. The length is aninch or more, the whorls are about twelve in num-ber, and the color is whitish or brown. This shell
. West American shells; a description in familiar terms of the principal marine, fresh water and land mollusks of the United States found west of the Rocky Mountains, including those of British Columbia and Alaska ... pire winds gracefully up-wards, and ends in a sharp point at theapex; while at the other end of the shell theaperture is small, and ends in a short, re-curved canal. Following the sutures is aspiral thread of beads, which adds much tothe attractiveness of the shell. The length is aninch or more, the whorls are about twelve in num-ber, and the color is whitish or brown. This shellis our representative of a large number of tropi-cal species of similar form, some of which arevery strong, and as long as your hand. Figure 139 also shows our rep-resentative of a large genus ofshells, most of which are found intropical seas. Its name is Gonuscalifornicus, Hds., the CaliforniaCone. While large and beautifulspecimens of the Cone-shells arefound in the warm water of the Pa-cific and Indian oceans, our littlespecies is very humble, being about an inch inlength, while its surface is of a sombre chestnutcolor, though one may be found occasionally thathas a brown, hairy epidermis. Specimens of this. Fig. 139, X I MARINE UNIVALVES 157 shell are most common on the coast of southernCalifornia. Figure 140 represents theshell of the rare and beautifulPleurStoma carpenteridna. Gabb, Carpenters Notched-side, (Surcula carpenteriana)This shell is spindle-shaped,with a conical spire, whichslopes with the utmost grace tothe apex, a long aperture, andan outer lip which has thecharacteristic notch near itsjunction with the whorl. Theshell is markedwith many finelines of growth,each of whichretains the pecu-liar notch. The p,^ ,,,ocolor is reddish yellow, whichis set oif by numerous narrow, re-volving stripes of reddish length of a good sized specimenis three inches. This species livesoff the coast of California, and mostof the specimens have been obtainedby dredging. F
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmollusks, bookyear190
