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This makes it peculiarly mischievous, for it will sometimes clasp a dozen or even twenty eggs in its Briarean grasp before it is discovered, and any egg that it has seized has received its death warrant." Mr. Armistead has known it appear within twenty-four hours. Byssus develops only on dead ova. Saprolegnia, known to fish culturists as "fungus," attacks both living or dead ova.
He is perfectly right in all he says with reference to the useful and preventive results of the use of "common garden" earth, or vegetable mould in checking any fungoid development, Saprolegnia or other. It must, however, be admitted that the said addition is not an element of beauty in a box; therefore it should be avoided, or only used when necessity dictates.
Plagiophrys. 96. Playtiptera polyarthra. 97. Polycoccus. 98. Pollen of pine. 99. Polyhedra tetraetzica. 100. " triangularis. 101. Polyphema. 102. Protococcus. 103. Radiophrys alba. 104. Raphidium duplex. 105. Rotifer ascus. 106. " vulgaris. 107. Silica. 108. Saprolegnia. 109. Scenedesmus acutus. 110. " obliquus. 111. " obtusum. 112. " quadricauda. 113. Sheath of tubelaria. 114.
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