[845] Friedrich 1906.

[846] Lindau 1895².

[847] [See p. 109.]

[848] Uloth 1861.

[849] Zopf 1903.

[850] Zopf 1907.

[851] Ohlert 1871.

[852] [See p. 75.]

[853] Uloth 1861.

[854] Egeling 1881.