A Monograph of the British Spongiadæ
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The oscula are about ten in number, and nearly at equal distances from each other ; they are slightly conical, and their margins are very thin and somewhat irregular.
The dermis of this sponge affords the most valuable distinctive characters. The dermal membrane is thin and translucent. It is abundantly furnished with numerous, slightly-curving, fasciculi of continuous series of spicula ; from the surfaces of the bundles, spi- cula are projected at slight angles towards their distal extremities..., where they radiate more or less in a fan- shaped manner, giving to the flat fasciculi an ajjpear- ance very like that of a small wet feather.
The skeleton is abundantly spiculous. The spicula are regularly acuate, of the same form as those of the dermis, but longer in their proportions, and, although nearly all of equal length, they vary to a considerable 192 PLATE LXXII.
extent in their diameter, some of them being of ex- treme tenuity. The spicula of this species and those of H. consimilis and fl".
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You can find similar books in the "Read Also" column, or choose other free books by Bowerbank, James Scott, 1797-1877 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The oscula are about ten in number, and nearly at equal distances from each other ; they are slightly conical, and their margins are very thin and somewhat irregular.
The dermis of this sponge affords the most valuable distinctive characters. The dermal membrane is thin and translucent. It is abundantly furnished with numerous, slightly-curving, fasciculi of continuous series of spicula ; from the surfaces of the bundles, spi- cula are projected at slight angles towards their distal extremities..., where they radiate more or less in a fan- shaped manner, giving to the flat fasciculi an ajjpear- ance very like that of a small wet feather.
The skeleton is abundantly spiculous. The spicula are regularly acuate, of the same form as those of the dermis, but longer in their proportions, and, although nearly all of equal length, they vary to a considerable 192 PLATE LXXII.
extent in their diameter, some of them being of ex- treme tenuity. The spicula of this species and those of H. consimilis and fl".
What to read after A Monograph of the British Spongiadæ?
You can find similar books in the "Read Also" column, or choose other free books by Bowerbank, James Scott, 1797-1877 to read onlineMoreLess
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