Metamorphoses of Newt.
"After a few days a small hole was observed in the sand near a large stone. To this hole one of the males was paying the most assiduous and extraordinary attention. He was poising himself at an angle of forty-five degrees or thereabouts; he commenced a tremendous motion of his whole body, making the sand a pivot, and at the same time beating the water with his fins. This motion increased regularly in rapidity for a minute or so, when it ceased abruptly, and the fish darted off, either in pursuit of some trespasser whom he chastised (the females not even being exempt), or to obtain materials to increase his nest. These consisted of pieces of stick or moss, which being saturated with water, were of such gravity as to prevent their rising. He deposited these with great care, leaving a perfectly round hole in the middle, and then having procured a mouthful of sand, laid it over the looser materials to cement them together.
"When completed, the nest resembled a flattened haycock.
"For about a week after this completion it seemed deserted. But one morning it was found that some eggs had been laid. These for the size of the fish are very large, being about the size of a middling-sized shot. They hatched in about from ten days to a fortnight,—the young fish remaining in the nest until the yolk-bag was absorbed, when, being large enough to look after themselves, they went their way. The parent who had so tenderly guarded them took no further heed of them, and himself died—such being the case in both instances which came under notice, both parents sickening and dying from the effects of spawning and watching, or perhaps from the aquarium not being fitted for their recovery."
Water-Fleas.