. The biology of the Protozoa. Protozoa; Protozoa. REPRODUCTION 209 are grouped according to the distribution of the three main types of the Protozoa-jNIastigophora, Sarcodina and Infusoria. A. Division and Reorganization in Mastigophora.—With very few exceptions division in flagellates is longitudinal, beginning as a rule at the anterior or flagellar end, the cleavage plane passing down through the middle of the body. As the halves separate the two daughter cells usually come to lie in one plane so that final division. Fig. 95.—Euglena nociahilis Dang. Vegetative individual (A) and simple and
. The biology of the Protozoa. Protozoa; Protozoa. REPRODUCTION 209 are grouped according to the distribution of the three main types of the Protozoa-jNIastigophora, Sarcodina and Infusoria. A. Division and Reorganization in Mastigophora.—With very few exceptions division in flagellates is longitudinal, beginning as a rule at the anterior or flagellar end, the cleavage plane passing down through the middle of the body. As the halves separate the two daughter cells usually come to lie in one plane so that final division. Fig. 95.—Euglena nociahilis Dang. Vegetative individual (A) and simple and mul- tiple division within cyst. (After Dangeard.) appears to be transverse. In marina division is actually transverse (Fig. 43, p. 88), and transverse or oblique in the Dino- flagellida generally. In the majority of forms the individuals divide while freely motile, but this is by no means universal, variations in this respect occurring in the same famil^' and exew in the same genus (see Dangeard, 1901). Thus in Euglenida^ division in the motile state occurs in some species of Euglena {E. liridis, E. genicn- lata, E. flam, etc.), in Peranema, Entosiphon, Menoidium, Astasia, 14. 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 Calkins, Gary N. (Gary Nathan), b. 1869. Philadelphia, New York, Lea & Febiger
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