. Text book of zoology. Zoology. Pig. 105. PoVystomum integerrvmum, from the central side, m Month, » sncker, t gnt.—After Zeller. Pig. 106. A Snail, with Leuchochloridium paradoxum in hoth tentacles. B the same, taken out of the SnaiL C Distomnm macrostomnm. p penis, Sj fore-, Sn hind-sncker, t gnt. A and B natural size, C X 20.—After Zeller. Class 3. Cestoda (Tapeworms). The Cestoda differ from the Trematodaj with, which they are nearly related, ui that they have no digestive tract, and almost always form chains by budding. A cestode chain consists, at first, of an asexual individual, the so
. Text book of zoology. Zoology. Pig. 105. PoVystomum integerrvmum, from the central side, m Month, » sncker, t gnt.—After Zeller. Pig. 106. A Snail, with Leuchochloridium paradoxum in hoth tentacles. B the same, taken out of the SnaiL C Distomnm macrostomnm. p penis, Sj fore-, Sn hind-sncker, t gnt. A and B natural size, C X 20.—After Zeller. Class 3. Cestoda (Tapeworms). The Cestoda differ from the Trematodaj with, which they are nearly related, ui that they have no digestive tract, and almost always form chains by budding. A cestode chain consists, at first, of an asexual individual, the so- called "head" (scolex), which is provided at the anterior end wtth. Pig. 107. Tasnia mediocanellata, part of the chain, natural size.—After Leuckart. suckers, hooks, or other organs of adhesion. Behind the head follows a larger or smaller number of segments (proglottides), , sexual individuals of different developmental grades, and of different 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 Boas, J. E. V. (Johan Erik Vesti), 1855-1935; Boas, J. E. V. (Johan Erik Vesti), 1855-1935. Lehrbuch der Zoologie. London, Sampson Low, Marston
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1896
