^{page 374 note 1} The ambiguous word schiefer is used. Perhaps some day Continental geologists will put an end to a long-standing confusion by using one term for a cleaved, another for an uncleaved rock. Here, I expect, the rocks are commonly slates.

^{page 375 note 1} Proc. Roy. Soc., 1887, vol. xlii, p. 318.Google Scholar

^{page 375 note 2} I have again examined my slice, but though a pyroxene is certainly (I said possibly before) present in grains of rather variable size, most at any rate give an oblique extinction. But I think it may also contain about two flakelets of biotite.