. The edible clams, mussels and scallops of California . Fig. 12. Macoma nasuta. Natural size. (A) Interior right valve. (B) Interior left valve. ii. Siphonate end of shell not produced; left valve much flatter than right, pallial sinus not reaching anterior muscle scar in either valve ; found deep in loose exposed sand. White sand clam M. srcta p. 44 ; pi. 12 , figs. .T, 4 , pi. 13 ; 1 gg. Shell with distinct blue or purplish color and conspicuous glossy reddish brown periostracum ; right valve much flatter than left; found in coarse sand or gravel. Purple clam i^duguinolaria nuttalli p
. The edible clams, mussels and scallops of California . Fig. 12. Macoma nasuta. Natural size. (A) Interior right valve. (B) Interior left valve. ii. Siphonate end of shell not produced; left valve much flatter than right, pallial sinus not reaching anterior muscle scar in either valve ; found deep in loose exposed sand. White sand clam M. srcta p. 44 ; pi. 12 , figs. .T, 4 , pi. 13 ; 1 gg. Shell with distinct blue or purplish color and conspicuous glossy reddish brown periostracum ; right valve much flatter than left; found in coarse sand or gravel. Purple clam i^duguinolaria nuttalli p. 46 ; pi. 14 , 2, 3 ee. in part external liut with a larger internal part (cartilage) ; pallial sinus not united witli pallial line ; shell round in outline, fairly heavy, tinged with pink at margins. Flat clam Semele clecisa p. 45 ; pi. 13 , fig. 2
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Photo credit: © The Bookworm Collection / Alamy / Afripics
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmollusks, bookyear192
