Identifier: introductiontozo00dave Title: Introduction to zoology; a guide to the study of animals, for the use of secondary schools; Year: 1900 (1900s) Authors: Davenport, Charles Benedict, 1866-1944 Davenport, Gertrude Anna Crotty, 1866- Subjects: Zoology Publisher: New York, Macmillan company London, Macmillian and co., ltd. Contributing Library: MBLWHOI Library Digitizing Sponsor: MBLWHOI Library

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Text Appearing Before Image: ymeans of these tentacles the animal can hold on to Para-, mecia and other free-swimming Infusoria, from which itextracts the body fluids. Some Suctoria are stalked (e.g.Podopliora^, while others are unstalked (e.g. Aeineta0).They are found most abundantly in standing water, eitherfresh or salt, and are often attached to other animals, -Bryozoa, entomostracans, and pulmonate mollusks. Of the group Flagellata,6 or lash-animalcules, Euglena7is a common representative . It is of microscopic size, butoccurs in such numbers as often to give a decided green 1 Dim. from vortex, whirlpool. 4 TTOUS, foot ; 60/>tfs, eyebrow. 2 Kapxyviov, goblet, Fig. 207. 5 d/aVr/Tos, without movement. 3 From sugere, snctum, to suck. & JlayeUum, a lash. 7 evy\r)vos, with a beautiful eye. 226 ZOOLOGY color to the pools of water it inhabits. It is spindle-shaped, and bears a flagellum at its anterior end. At thebase of the flagellum is a red eyespot. Allied to Euglena is Volvox,1 a spherical, multicellular

Text Appearing After Image: c-.vac FIG. 2S. —Eiif/lena viriilis, a lash-animalcule. A-D, four views illustratingthe characteristic movements; E and //, enlarged views of adult; F, out-line of anterior end further enlarged ; G, resting stage ; cy, cyst; .//, liagel-huu; m, mouth; nu, nucleus; w, gullet; pg, pigment spot; /•, reservoir.After Kent and Klebs. ~~| organism, half animal and halfplant, and forming a sort of con-necting link between the Pro-tozoa (or one-celled animals) andthe multicellular higher organ-isms. Volvox occurs abundantlyin our ponds and gets its namefrom its manner of revolving in FIG. 209. -- Volvox globator. t]ie water (Fig. 209).Much magnified. Photo. Y, .••.•••. £ of the living animal. Very different in habitat irom

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