Zoology : an elementary text-book / [Sir A.E. Shipley].

  • Arthur Shipley
Date:
1920
Catalogue details

Licence: Public Domain Mark

Credit: Zoology : an elementary text-book / [Sir A.E. Shipley]. Source: Wellcome Collection.

    67/780 (page 43)
    grow up they frequently become stalked like Vorticella, but they lose their cilia and acquire instead a number of stiff rod-like outgrowths ending in knobs; these structures are termed tentacles. These are able in some way which we do not understand to seize small animals and suck out their contents. Some secretion must be produced which eats its way through the cuticle and dissolves the contents of the prey. Suctoria have micronuclei and conjugate like Giliata. G Fig. 15. Clepsidrina lovga, from larva of Tijiula, the Daddy-long-legs. Highly magnified. From Leger. i*• A, B, C, D, E. Stages of the development of C. longa, at first within and then pushing its way out of one of the cells of the intestine of the Tipula larva. F. Mature form. G. Two forms conjugating. 1. Cell of intestine of host. 2. Its nucleus. The last group of Protozoa, the Sporozoa, agree with the ^ Flagellata in showing a great range of forms, the lowest of which can emit pseudopodia whilst the more highly specialised possess a well developed cortical layer with myonemes. None possess cilia or flagella; their movements, which are very sluggish, are carried out entirely by contractions of the cortex, which give rise to worm-like wrigglings. The name,