. Juvenile Instructor. 7. Dredge used In gathering oysters. parts of our own country and onthe eastern hemisphere vast heaps of THE JUVENILE INSTRUCTOR. 437 bivalve shells, mingled with flintknives, and other tools of stone, tell ofgreat oyster feasts, which gladdened thespirits of prehistoric tribes. Theseshell heaps are known as kitchen-mid-dens, or kitchen refuse piles. A family of bivalves closely allied tocommon c^-sters includes the Pectcns orScallop, sometimes called shell (figure 8) is beautifully ribbed. Figures. Sliell of the Iec-ten or .SciiUop {_Pectenifradidns). an
. Juvenile Instructor. 7. Dredge used In gathering oysters. parts of our own country and onthe eastern hemisphere vast heaps of THE JUVENILE INSTRUCTOR. 437 bivalve shells, mingled with flintknives, and other tools of stone, tell ofgreat oyster feasts, which gladdened thespirits of prehistoric tribes. Theseshell heaps are known as kitchen-mid-dens, or kitchen refuse piles. A family of bivalves closely allied tocommon c^-sters includes the Pectcns orScallop, sometimes called shell (figure 8) is beautifully ribbed. Figures. Sliell of the Iec-ten or .SciiUop {_Pectenifradidns). and is expanded on either side of theumbo in wing shape. The scallops arealso used as human food; the largeadductor muscle being however the onlychoice part. The border of the pectensmantle is dotted with brilliant eye spots,giving to the body a beautifulappearance. The crea-ture is remarkableamong bivalves for itspowers of motion, bythe rapid opening andclosing of its valves,it is able to dartthrough the water withgreat rapidity, andseeming ease. One ofthe commonest varietiesis known as the dancingpecten, because of itslively nature. Scallopshells are prized as orna-ments and in some partsof England they areused as scoops in handl-ing sugar and other such commodities in the shops of retailgrocers. The wing shells belong to a relatedfamily the Ariculidac or little birdmollusks, so named from the unequalwing-like expansion of the shell on oneside of the umbo. This is illustrated infigure 9. To this family belong also thePea
Size: 1577px × 1584px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorgeorgequaylecannon182, bookcentury1800, bookdecade1890
