. Text-book of zoology for schools and colleges. Zoology. ifte. 9.—a Gemmnle ot SponglUa; h HDnm; 5 Diagrammatio Eection of the gcmniulei showing the outer layer of spicules or amphidiscs, and the inner mass of cells; h Hilum; c One of the amphidiscs seen in profile; d Fragment of the skeleton of a horny sponge (after Bowerbank), showing the mterlacing horny fibres with spicula. All much magni- fied. Such, then, are the general phenomena exhibited by any sponge, and the chief variations which occur among the sponges are to be found in the nature of the skeleton. In the sponges of commerce the
. Text-book of zoology for schools and colleges. Zoology. ifte. 9.—a Gemmnle ot SponglUa; h HDnm; 5 Diagrammatio Eection of the gcmniulei showing the outer layer of spicules or amphidiscs, and the inner mass of cells; h Hilum; c One of the amphidiscs seen in profile; d Fragment of the skeleton of a horny sponge (after Bowerbank), showing the mterlacing horny fibres with spicula. All much magni- fied. Such, then, are the general phenomena exhibited by any sponge, and the chief variations which occur among the sponges are to be found in the nature of the skeleton. In the sponges of commerce the skeleton consists of matted fibres composed of a substance nearly allied to horn. In other forms the skeleton is calcareous, or composed of lime; and in other cases, again, it is siliceous, or composed of flint. The Venus's flower-basket (Buplectella), which looks like a goblet woven. 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 Nicholson, Henry Alleyne, 1844-1899. New York, D. Appleton and Co.
Size: 1485px × 1683px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
