The nuptial flight places her permanently in possession, till death, of the spermatozoa torn from her unfortunate lover. [Please select]
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Probably all Spongillidæ are potentially monoecious, that is to say, able to produce both eggs and spermatozoa. [Please select]
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This bag contained either pulpy matter, or a great mass of spermatozoa. [Please select]
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I compared these spermatozoa with others taken out of the vesiculæ seminales of the individual hermaphrodite _S. [Please select]
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The full development of the spermatozoa consumes, I suppose, some considerable lapse of time. [Please select]
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In one specimen, I believe I distinguished the vesiculæ seminales: if so, they contained only pulpy matter, and not spermatozoa. [Please select]
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When mature they may be said essentially to be mere bags of spermatozoa. [Please select]
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The rate of the segmentation is likewise determined by the number of the spermatozoa. [Please select]
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In these several cases, the spermatozoa and pollen-grains must exist in considerably larger numbers. [Please select]
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It is not known whether the eggs of sponges are fertilized by spermatozoa from the individual that produces the egg or by those of other individuals, but not improbably both methods of fertilization occur. [Please select]
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The contents of these cells divide and subdivide in such a way that they finally consist of a mass of spermatozoa surrounded by a single covering cell, which they finally rupture, and so escape. [Please select]
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