Zöology; a textbook for colleges and universities . A Drawing by R. Weber FIG. 41. Types of Protozoa. A, Shell of Lagena (Foraminifera) Marine; B, Stylo-cephalus, a gregarine parasitic in beetles; C, Quadrulella, a freshwater much magnified. PROTOZOA 193 division, but the individuals may frequently be seen toconjugate, whereby a certain amount of their proto-plasmic substance is interchanged. This differs from y-iW/ Wfl T^«.7S-^S^T? /^>%fe> n

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Keywords: ., bookcentury1900, bookdecade1920, booksubjectzoology, bookyear1920