. In brook and bayou; or, Life in the still waters . by thefree end, and then wriggle or vibrate it until itsplits into two shreds. 2. They multiply by short division—i. e.,by dividing across the long axis. This is calledtransverse fission. 3. They break up into spores or seeds ofanimals (7, 8, Fig. 10). When an animal is about to form spores,it withdraws all its organs of locomotion andprehension, becoming round and outer part becomes a sack or cyst, withinwhich numerous small bodies form and growuntil the cyst wall breaks and the spores orgerms of new animals fly out. This meth
. In brook and bayou; or, Life in the still waters . by thefree end, and then wriggle or vibrate it until itsplits into two shreds. 2. They multiply by short division—i. e.,by dividing across the long axis. This is calledtransverse fission. 3. They break up into spores or seeds ofanimals (7, 8, Fig. 10). When an animal is about to form spores,it withdraws all its organs of locomotion andprehension, becoming round and outer part becomes a sack or cyst, withinwhich numerous small bodies form and growuntil the cyst wall breaks and the spores orgerms of new animals fly out. This method of reproduction allies the ani-mal with the plant. THE WHIPLASHERS. 33 II. Some parents have a childs picture takenevery year so as to keep a series of photographswhich shall be a record of his changing fea-tures and growth through life. Figs. 9 and 10 show a series of pictures,giving the life history of a flagellate monadwhose name is Dallingeria DrysdalL This is a wee little thing about ^oVo ^^ ^^inch in length, w^hich travels gracefully and. Fig. 9.—Dallino^eria. swiftly, ordinarily seeming very serious anddemure. But every little while it appears to feel theneed of some gymnastic exercise. So it anchors 34 IN BROOK AND BAYOU. itself by the free ends of its posterior flagella,and, by coiling them up tight, draws itselfback; then, by uncoiling, it suddenly springsforward; again it coils and draws back andagain springs forward; repeating this jumpingprocess over and over again, seeming to thinkit no end of fun. The Dallingeria divides by longitudinalfission, splitting the anterior flagellum intotwo, in from one half to one minute. Thewhole process of division occupies not morethan seven minutes, and is repeated at intervalsof a few moments; so the Dallingeria need notbe lonesome. If one boy tires and will notplay the jumping game any longer, the othercan make himself a new companion in sevenminutes. After repeated divisions of this sort ourlittle monad makes a great dep
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Keywords: ., bookcentury1800, bookdecade1890, bookidinbroo, booksubjectzoology
