...thickened and supports a number of sense hairs ; this is also the case with Mactra. In the pigmented areas, the same colorless cells, as in Area, are seen surrounded...is sensitive to changes in the intensity of light. He has sectioned the pigmented areas and finds two kinds of cells, pigmented and colorless ones, which...

...Untersuchungen, namentlich bezüglich des Pecten- Auges, von weit größerer Sorgfalt sind, sich der SHARp'schen Deutung anschließen konnte. Er sagt, ohne selber...hervorgehoben, nicht existieren) the same colorless cells, äs in Arca, are seen surrounded by pigmented ones and undoubtedly represent scattered ommatidia. I...