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Identifier: albanydirectoryf1861alba
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Publisher: Albany, N.Y. : George Adams
Contributing Library: University of Pittsburgh Library System
Digitizing Sponsor: Lyrasis Members and Sloan Foundation
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COFFEE,
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I I I I I SPICES, MUSTARD, &C., At the Longest Nei^ York Prices. DEPOT, No. 50 STATE STREET, Manufactory, Comer MORTON & ELIZABETH STREETS, JAMEiS TRAVJGRS. mi4i?fir. m. T, JOHN McEVOY. ADVERTISING DEPARTMENT. 29 EMPIRE STEAM, COFFEE & SPICE MILLS.BACON & STICKNEYS,
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Identifier: popularsciencemo27newyuoft
Title: Popular science monthly
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Subjects: Science
Publisher: New York : D. Appleton
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto
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at part, and even beyond it, immediately close in upon the needleand grasp it tightly. This simultaneous movement of such a littleforest of prehensile organs is a very beautiful spectacle to witness.Here we have proof of the function of the pedicellarige. In climbingperpendicular or inclined surfaces of rock covered with waving sea-weeds, it must be of no small advantage to an echinus to be providedon all sides with a multitude of movable stalks bearing forceps, whichcan instantly seize a passing frond. The frond being thus arrested,the spines come to the assistance of the pedicellariaB, and both to-gether hold the sea-weed steady till the ambulacral feet have time to CURIOSITIES OF STAR-FISH ~LIFE. 367 establish their hold upon it with their sucking-disks. This operationmay be witnessed by drawing a piece of sea-weed over a healthyechinus in the water. The capability of the spines for co-ordinated action is highly re-markable and interesting. Thus, for instance, if an urchin be taken
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Identifier: popularsciencemo27newyuoft
Title: Popular science monthly
Authors:
Subjects: Science
Publisher: New York : D. Appleton
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto
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About This Book: Catalog Entry
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■ .ititiiin:iii.iiiiiM|Mi4i;ito!.|.,.|/i);illlilJj|illllllll|.!ll|||!|iiti||||in^
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Figs. 11 and 12.—Eightisg and AiiEirLACRAL Movements of several Segments of Echinus. out of the water and placed upon a table, it is no longer able to useits feet for walking, as the suckers can act only under water. Yetthe animal is able to progress slowly by means of its spines, whichare used to proj) and push the globe-like shell along in some continu-ous direction. If a lighted match be held in front of the moving ani-mal, as soon as the echinus comes close enough to feel the heat, all thespines begin to make the creature move away in the opposite direction.There is an urchin-like form of echinoderm called spatangus, whichdiffers from the echinus in having shorter feet and longer spines.When, therefore, a spatangus is inverted it is unable to right itself 368 THE POPULAR SCIENCE MONTHLY. by means of its short feet, but uses its long spines to perform themanoeuvre. The process is a tedious one, and there are generallynumerous failures ; but the creature perseveres until it eventu
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