Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 702
Fig. 359, c, a), assumes a cylindrical form, and elongates itselfconsiderably; a constriction or indentation is then seen around it,just below the ring which encircles the mouth and gives origin tothe tentacles; and similar constrictions are soon repeated roundthe lower parts of the cylinder, so as… … o still left at the attached extremity. The number of circles is in-definite, and all are not formed at once, new constrictions appear-ing below, after the upper portions have been de- Fig. 359. tached; as many as 30 oreven 40 have thus beenproduced in one speci-men. The constrictionsthen gradually…
Microscopy · Biology
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