. The edible clams, mussels and scallops of California. . Fig. 4. Monia macroschisma. Two-thirds natural size upper or left valve. (B) Interior lower or right valve. (A) Interior cc. Left valve with four muscle scars (one adductor, three byssal muscles) very delicate, smooth textured and usually translucent, rarely between tides. * Anoinia peruviana P. 26 ; pi. 3 , ; shell taken fig. 3 bb. Valves similar or unlike, without byssal notch. c. Shell irregular, without radiating ribs or lateral projections on either side of umbo, permanently attached by left valve; mantle without eyes- flesh white
. The edible clams, mussels and scallops of California. . Fig. 4. Monia macroschisma. Two-thirds natural size upper or left valve. (B) Interior lower or right valve. (A) Interior cc. Left valve with four muscle scars (one adductor, three byssal muscles) very delicate, smooth textured and usually translucent, rarely between tides. * Anoinia peruviana P. 26 ; pi. 3 , ; shell taken fig. 3 bb. Valves similar or unlike, without byssal notch. c. Shell irregular, without radiating ribs or lateral projections on either side of umbo, permanently attached by left valve; mantle without eyes- flesh white or tinged with greenish ; found in colonies or masses. Oysters Ostrea p. 24 cc. Shell with radiating ribs and lateral projections or "ears" on either side of the umbo ; regular in shape and free for at least part of adult life ; margin of mantle with numerous minute eyes; flesh tinged with orange or red â found separate and free during early adult life at least. Scallops d' F*ee,K?/!£S ^ Sl^Pe 1°" entire Hfe' interi0r of ninge area not Purplish; shells light; capable of swimming actively. Pecten circularis p. 24 ; pi. 1 , figs. 1, 2 dd. Free and regular for part only of adult life, later attached by right valve which retains pattern of young free shell; interior of hinge area purplish; shells heavy and thick. Hinnites giganteus p. 25 ; pi. 1 , fig. 3 ; pi. 2 , figs. 1, 2 aa. Two adductor muscles present; adult either attached by flexible byssus, moving aSVv .hTf1/001 °l burrowin^ ^sua"y not lying on one side, never attached by shell (m forms here treated), nor swimming (except Solen). ^ occ Tig", o ) b. Posterior adductor large, anterior small, umbo near anterior end of shell â mantle edges fused at only one point, forming an exhalent siphonal aperl ture; no pallial sinus ; adults attached to firm objects, or anchored in mud of * * °" ^ ^ l "^ m°^« wh» adult; shells brZn Mussels C' UmXuL7nT«£%Ja£?
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Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishersacra, bookyear1920
