ON THE COVER: A colonial chrysophyte Synura hibernica, composed by several elongated cells joined together by their posterior ends. Note the layer or imbricate silica scales covering the entire surface of the cells. This species has a striking distribution pattern, being quite common in North America but much less so in Europe where it occurs only in western Ireland.

中文翻译：

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盖

覆盖物：殖民地温柔金缕梅，由几个细长的细胞通过其后端连接在一起。注意覆盖细胞整个表面的层或网状二氧化硅鳞片。该物种具有惊人的分布模式，在北美非常普遍，而在欧洲则很少，那里仅在爱尔兰西部出现。