Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 721
Calcareous plates iu Skin of Holotliuria. so distinctive a feature of the class generally. But a microscopicexamination of their integument at once brings to view the exist-ence of great numbers of minute isolated plates, every one of thempresenting the characteristic reticulated structure, which…
Microscopy · Biology
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