. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. Fig. 217. — A, advanced embryo Anodonta; B, free Glochidium ; /, pro- visional byssus ; s, shell ; s/i, hooks ; sm, adductor muscle ; so, sense organs ; to, cilia. From Korschelt and Heider's " Embrj'; Their food is gained from organic particles borne along in the current of the water. A part of this current is carried through the mantle chamber and forced out again, deprived of usable food and of the oxygen used in respiration. By devouring organic matter these clams act as useful scavenger
. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. Fig. 217. — A, advanced embryo Anodonta; B, free Glochidium ; /, pro- visional byssus ; s, shell ; s/i, hooks ; sm, adductor muscle ; so, sense organs ; to, cilia. From Korschelt and Heider's " Embrj'; Their food is gained from organic particles borne along in the current of the water. A part of this current is carried through the mantle chamber and forced out again, deprived of usable food and of the oxygen used in respiration. By devouring organic matter these clams act as useful scavengers of the water. On account of' the sessile habits of Unios they can hardly go in search of their food, and so it is necessary that the}' should live in a current of water which will bring them food. The family of Unionidae, to which ITnio and Anodontia belong, is of world-wide distribution, but nowhere else are. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Davenport, Charles Benedict, 1866-1944; Davenport, Gertrude Anna Crotty, 1866- joint author. New York, Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1911
