The female may store a male 's hydraulically implanted spermatophore -LRB- a tapered , cylindrical satchel of sperm -RRB- for long periods before she is ready to fertilize her eggs .

The female may store a male 's hydraulically implanted spermatophore -LRB- a sort of tapered , cylindrical satchel of sperm -RRB- for long periods before she is ready to fertilize her eggs .
