. Elements of zoölogy. Zoology. 8 PROTOZOANS. Order I. Flagellata (Monads).—If standing water is examined with a microscope, it will be found fairly alive with numbers of minute pear- and oval-shaped creatures, having, at the place where the stem would be, alash, that vibrates and whirls about as the animal moves along. One of. the Monads, the Noctilu- ca (Fig. 6), a giant of its kind, lives in the ocean, and in appear- ance resembles a cur- rant about the size of a small pin-head. On one side there is a groove, from which issues a single whip, or cilium, that is a lo- comotive organ, and near
. Elements of zoölogy. Zoology. 8 PROTOZOANS. Order I. Flagellata (Monads).—If standing water is examined with a microscope, it will be found fairly alive with numbers of minute pear- and oval-shaped creatures, having, at the place where the stem would be, alash, that vibrates and whirls about as the animal moves along. One of. the Monads, the Noctilu- ca (Fig. 6), a giant of its kind, lives in the ocean, and in appear- ance resembles a cur- rant about the size of a small pin-head. On one side there is a groove, from which issues a single whip, or cilium, that is a lo- comotive organ, and near where this joins the body is the mouth. The outer surface of the animal is a firm membrane, beneath which is the jelly-like mass containing numerous granules, from which rises a regular network of fibers that lead over the entire body. The young are produced by a mere break- ing off of a portion of the Fig. 6.—Giant monad Noctiluca. e, gastric vacuole ; g, radiating filaments. Note.—As many as thirty thousand of these forms have been seen in the ocean in a cubic inch, moving about with great rapidity, and producing a most wonderful phosphorescent light. Other monads are compound (several joined together), as the Uvella, while others are fixed, attached to the bottom by a slender stalk, as the Codosiga. Here the little hair- like organ is used to throw food into the mouth. Others of this order have their delicate forms protected by a hard. 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 Holder, Charles Frederick, 1851-1915; Holder, Joseph Bassett, 1824-1888, joint author. New York : D. Appleton and company
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
