. Bulletin. Science; Natural history; Natural history. 186 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. gfvV T r VSLi^&v^i»^S9^22 •• .* Fig. 3. Two cell stage of cleavage of Clathrina blanca; note the nucleus and large nucleolus. Scale, 10 jxm. Fig. 4. Young embryos of Clathrina coriacea; note the flattened, elongated cells surrounding each embryo and the unorganized appearance of the parent tissue. Scale, 50 /xm. Embryonic Development.—Cleavage in C. coriacea and C. blanca is total and equal. The two cell stage, illustrated in Fig. 3, shows the granular cytoplasm, and the nucleus and nucleolu
. Bulletin. Science; Natural history; Natural history. 186 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. gfvV T r VSLi^&v^i»^S9^22 •• .* Fig. 3. Two cell stage of cleavage of Clathrina blanca; note the nucleus and large nucleolus. Scale, 10 jxm. Fig. 4. Young embryos of Clathrina coriacea; note the flattened, elongated cells surrounding each embryo and the unorganized appearance of the parent tissue. Scale, 50 /xm. Embryonic Development.—Cleavage in C. coriacea and C. blanca is total and equal. The two cell stage, illustrated in Fig. 3, shows the granular cytoplasm, and the nucleus and nucleolus. In the four cell and eight cell stages further equal divisions occur. After the eight cell stage a blastula is formed. The young blastula. 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 Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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Keywords: ., bookcentury1900, booksubjectnaturalhistory, booksubjectscience
