. Outlines of zoology. Zoology. Fig. 68.—Development of rolygordius. (After Fraifoxt.) a., Mother sperm cell ; h., c, sperm morulje ; d., spermaluzoa. I. Ovum with large nucleus ; 2. a-cell stage ; 3. 4-cell stage ; 4. blastosphere ; 5. gastrula; ac, archenteron ; 6. closure of gastrula mouth or blastopore; 7. for- mation of stomatodffiura(i^.), and proctodeum (/r.), invaginated to meet archenteron (^.); 8. complete gut formed; g. elongation of larva ; ap. s/>.^ apical spot; cii., cihated ring; tteph., primitive nepbridia; 10. formation of posterior segments; II. rorm of A'iu\t Poly£^ordius
. Outlines of zoology. Zoology. Fig. 68.—Development of rolygordius. (After Fraifoxt.) a., Mother sperm cell ; h., c, sperm morulje ; d., spermaluzoa. I. Ovum with large nucleus ; 2. a-cell stage ; 3. 4-cell stage ; 4. blastosphere ; 5. gastrula; ac, archenteron ; 6. closure of gastrula mouth or blastopore; 7. for- mation of stomatodffiura(i^.), and proctodeum (/r.), invaginated to meet archenteron (^.); 8. complete gut formed; g. elongation of larva ; ap. s/>.^ apical spot; cii., cihated ring; tteph., primitive nepbridia; 10. formation of posterior segments; II. rorm of A'iu\t Poly£^ 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 Thomson, J. Arthur (John Arthur), 1861-1933; Newbigin, Marion I. (Marion Isabel), 1869-1934; Smith, Preserved, 1880-1941. fmo. New York, D. Appleton & Co.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
