. The Cambridge natural history. Zoology. I82 PORIFERA CHAP. VII Saviile Kent, and since rediscovered both in England and ' This is a colony of unicellular individuals embedded in a common jelly. The individuals at the surface are choanoflagellate, while in the interior the cells are rounded. Fig. 75.—Protewspongia haeckeli. a, Amoeboid cell; 5, a cell dividing ; c, cell with small collar ; z, jelly, x 800. (After S. Kent.) or amoeboid, and some of them undergo multiple fission to form reproductive cells. This is just such a creature as we might imagine that ancestral stage to have bee
. The Cambridge natural history. Zoology. I82 PORIFERA CHAP. VII Saviile Kent, and since rediscovered both in England and ' This is a colony of unicellular individuals embedded in a common jelly. The individuals at the surface are choanoflagellate, while in the interior the cells are rounded. Fig. 75.—Protewspongia haeckeli. a, Amoeboid cell; 5, a cell dividing ; c, cell with small collar ; z, jelly, x 800. (After S. Kent.) or amoeboid, and some of them undergo multiple fission to form reproductive cells. This is just such a creature as we might imagine that ancestral stage to have been of which the free- swimming sponge larva is a reminiscence: for we have seen that the flagellated cells of the larva are potential choanocytes. 1 Franc^ Orgaiiisnius der Craspedomonaden, Budapest, 1897, p. 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 Harmer, S. F. (Sidney Frederic), Sir, 1862- ed; Shipley, A. E. (Arthur Everett), Sir, 1861-1927. ed. [London, Macmillan and Co. , Limited; New York, The Macmillan Company
Size: 1719px × 1454px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
