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The pools and lagoons contain Unios, Paludinas, and the lanceolate and oval Limnaeas. Fine dry weather has set in; the northerly breeze is still very regular; but the mornings, from eight to eleven, are very hot. A few mosquitoes have made their appearance, probably in consequence of the late rains.
There are eight varieties of these limnaeas alone, and six more elegant shells of much the same appearance, but of a different race. The minute elegance of many of these shells is very striking. Tiny physas and succineas, no larger than shot, live among big paludinas as large as a garden snail, while all sizes of the larger varieties are found, from microscopic atoms to the perfect adult.
The so-called "snails" are really quite different from each other, some, the paludinas, being large, thick-striped shells, while the limnaeas are thin, more delicately made, some with fine, pointed spiral tops, and others in which the top seems to have been absorbed in the lower stories.
The plains, which were very level, with a few melon-holes, were scattered all over with dead Limnaeas, which showed evidently, that fresh, or slightly brackish water, covered them occasionally, and for some length of time.
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