. Elementary text-book of zoology. Zoology. horny fibres from Etispongia In this stage we can distinguish three layers - (1) an entoderm, formed of elongated flagellated cells; (2) a mesoderni, the skeleto- genous cell layer, the structure of which recalls connective tissue; and (3) an ectoderm, which forms the outer layer of the Sponge, and consists of a flat epithelium. The cylindrical cells of the endo- derin possess at their free ends surrounding the flagellum a delicate FIG. 159.—Calcareous Spicules of Please note that these images are extracted from scanned page images t
. Elementary text-book of zoology. Zoology. horny fibres from Etispongia In this stage we can distinguish three layers - (1) an entoderm, formed of elongated flagellated cells; (2) a mesoderni, the skeleto- genous cell layer, the structure of which recalls connective tissue; and (3) an ectoderm, which forms the outer layer of the Sponge, and consists of a flat epithelium. The cylindrical cells of the endo- derin possess at their free ends surrounding the flagellum a delicate FIG. 159.—Calcareous Spicules of 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 Claus, Carl, 1835-1899; Sedgwick, Adam, 1854-1913; Sinclair, F. G. (Frederick Granville), b. 1858. New York : Macmillan
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
