. Elementary text-book of zoology [electronic resource]. Zoology. PORIFERA. acid. They are found to be calcareous in nature. They sup- port the wall of the sponge and form its skeleton. The farther structure of Sycandra must be followed by prepared microscopic sections or by teasing to pieces and examination with the micro- scope. A transverse section as seen with low powers is shown in Fig. 39. The wall here shows I'ig- 39-—Transverse Section of a Sycandra {A Sycon).. The central cavity is the paragastric cavity. a number of radial canals^ some of them with thick walls and others with thin. T
. Elementary text-book of zoology [electronic resource]. Zoology. PORIFERA. acid. They are found to be calcareous in nature. They sup- port the wall of the sponge and form its skeleton. The farther structure of Sycandra must be followed by prepared microscopic sections or by teasing to pieces and examination with the micro- scope. A transverse section as seen with low powers is shown in Fig. 39. The wall here shows I'ig- 39-—Transverse Section of a Sycandra {A Sycon).. The central cavity is the paragastric cavity. a number of radial canals^ some of them with thick walls and others with thin. The former open into the paragastric cavity by small contracted apertures and are called exhaknt canals, whilst the latter open by the pores to the exterior and are termed inlialenf canals. Further examination would show that the two sets of canals Fig. 38—Calcareous Tri- radiate Spicules of Sycandra [Grantia).. 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 Masterman, Arthur Thomas; Parsons, John Herbert, Sir, 1868-1957, donor; S. H. Lazarus (Firm); University College, London. Library Services. Edinburgh : E. & S. Livingstone
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1901
