Abstract
SPECIMENS of this sponge collected at Calf Sound, Isle of Man, were investigated for spicules, and for their arrangement in the body of the sponge. Six types of spicules were found, ranging from very large tetraradiates and triradiates to long slender and minute rod-like oxea1. When the acid test was applied to a slide with dried spicules, all except the long slender oxea dissolved. These oxea are present in large numbers, and are set vertically in a palisade round the osculum.
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References
Bowerbank, J. S., “British Spongiadæ” 2, 36 (1866) (as L. nivea). Haeckel, E., “Die Kalkschwämme”, 2, 221 and Pl. 34. 1h. (1872).
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EALES, N. Siliceous Spicules in the Calcareous Sponge, Leucandra johnstonii (Carter). Nature 172, 687 (1953). https://doi.org/10.1038/172687a0
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DOI: https://doi.org/10.1038/172687a0
