[375] Darbishire 1898.

[376] Darbishire 1895.

[377] Brandt 1906.

[378] Hue 1906.

[379] Haberlandt 1896.

[380] Schulte 1904.

[381] [See p. 120.]

[382] Lutz 1894.

[383] Peirce 1898.

[384] Zopf 1903.