. West coast shells. A familiar description of the marine, fresh water, and land mollusks of United States, found west of the Rocky Mountains ... ig. 93 shows us the appearance of a lean Chiton,for that is signified by the first part of its long name,Ischnochiton regularise Cpr., Ish-no-ki-ton reg-u-la-ris. The last name signi-fies, moreover, that it is of a very regu-lar form, and this is true. Its width,which is constant, is half its length, andthe ends are semi-circles. The valves are sharply arched, andare marked with very fine the aid of a lens the mantle-border is seen to
. West coast shells. A familiar description of the marine, fresh water, and land mollusks of United States, found west of the Rocky Mountains ... ig. 93 shows us the appearance of a lean Chiton,for that is signified by the first part of its long name,Ischnochiton regularise Cpr., Ish-no-ki-ton reg-u-la-ris. The last name signi-fies, moreover, that it is of a very regu-lar form, and this is true. Its width,which is constant, is half its length, andthe ends are semi-circles. The valves are sharply arched, andare marked with very fine the aid of a lens the mantle-border is seen to resemble fine Fls-93-bead-work. The color is dark olive-green, and the length is an inchand a half or less. Stenoradsia Magdalensis, Rve.,Sten-o-rad-si-a Mag - da - len- sis,Fig. 94. This large and very commonChiton may be found under rocksat low tide, and may at once berecognized by its worn or roughlysculptured, low-arched valves,which are white internally, andof a light ash-gray color on theoutside. The hairless mantle-border is of a similar neutral tint,but the foot is yellow. Whentaken from the rock it has a habit of curling itself up. Fig. 94. io8 THE VEILED CHITON. length is two or three into a ball. Its commoninches. Mangerella conspicua, Cpr., Man-ger-el-la con-spik-u-a, resembles the above, and is considered byMr. Hemphill as merely a variety of that mantle-border is roughened by numerous short,tubular hairs. Large; southern. Placiphorella velata, Cpr., Pla-sif-o-rel-la ve-la-ta,Round Chiton, is shown in Fig. 95. This singular coat-of-mail shell is more nearlycircular than any of its relatives. Asshown in the cut, the muscularmantle in which the valves are in-serted is considerably prolonged atone end, forming a kind of veil orawning, quite different from that ofany other species with which I amacquainted. The mantle-border andthe veil are set with a few stiffvalves are low-arched, of a dull red-dish brown without, but white within. Its length isan inch or
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectmollusks, bookyear188
