. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. ISG ZOOLOGY. Nereis lives on both plant and animal food. To capture its pre}' it thrusts out a long proboscis, provided with two power- ful jaws. The thrusting-out consists essentially of a rolling out,—just as the finger of a glove may be rolled inside out. When the pro- boscis is rolled in again, the jaws, retaining their grip on the food, carry it into the food canal.' While many kinds of small animals serve Nereis as food, it is itself devoured by various fishes which dig it out of the sand or c
. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. ISG ZOOLOGY. Nereis lives on both plant and animal food. To capture its pre}' it thrusts out a long proboscis, provided with two power- ful jaws. The thrusting-out consists essentially of a rolling out,—just as the finger of a glove may be rolled inside out. When the pro- boscis is rolled in again, the jaws, retaining their grip on the food, carry it into the food canal.' While many kinds of small animals serve Nereis as food, it is itself devoured by various fishes which dig it out of the sand or capture it when it swims free at night __ ^ Fig. 177-Lep- ^^ during the breed- idonotus, the " scaled worm, ing season. Such a Photo. i,y'w; favorite with fishes H- <^'- P- naturally makes ex- cellent bait, and is well known to fishermen under the name " clam- worm " or " ; We have seen that Nereis lives ^ for a short period each year a free life, swimming in the sea. Accord- '' ingly its l)ody is divided into rings of nuiscle enabling it to writhe. Locomotion by writhing is further facilitated t)y the existence of a pair of ap]iendages (parapodia) on each segment. The appendages are nearly alike on all the segments of the Ijody. They diminish in size. 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
