First lesson in zoology : adapted for use in schools . Fig. 59.—A, the clam with its siphon extpnded: in its natural position in themud, head downwards. B, CTnio, or fresh-water mussel; transverse section ofthe shell, showing the position of the spring* opening* the shell; m, adductormuscle. C, clam: 2, ligament. D. transverse view of animal of Unio (afterBrooks); ab, abdomen or visceral mass; a, auricles; v, ventricle; i, intestine;t, glandular part of kidney; z, non-glandular part of kidney; j/, sinus venosus;ig, inner, eg^ outer, gills; m, mantle. 58 FIRST LB880N8 IN ZOOLOGY. lifted up^ and
First lesson in zoology : adapted for use in schools . Fig. 59.—A, the clam with its siphon extpnded: in its natural position in themud, head downwards. B, CTnio, or fresh-water mussel; transverse section ofthe shell, showing the position of the spring* opening* the shell; m, adductormuscle. C, clam: 2, ligament. D. transverse view of animal of Unio (afterBrooks); ab, abdomen or visceral mass; a, auricles; v, ventricle; i, intestine;t, glandular part of kidney; z, non-glandular part of kidney; j/, sinus venosus;ig, inner, eg^ outer, gills; m, mantle. 58 FIRST LB880N8 IN ZOOLOGY. lifted up^ and then the mantle taken up with it can becarefully, and without injuring the clam, pressed awayfrom the shell, and allowed to fall down over the exposedside of the clam in its former, natural position. The up-per valve, thus partly removed, can be now pulled away fromthe other by tearing apart the ligament which holds it toits fellow-valve. Now we can obtain some idea, without further injuringor materially displacing the parts of the body of the cla
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1894
