[585] Steinhauer (18), Pls. V. and VI.
[586] Martin (09), Pls. VIII. XXV. and XXVI.
[587] Artie (25).
[588] Brongniart (22), p. 218.
[589] Brongniart (28), p. 34.
[590] Lindley and Hutton (31).
[591] Cotta (50). I am indebted to Prof. Stenzel of Breslau for calling my attention to the fact that Cotta’s work appeared in 1832, but in 1850 the same work was sold with a new title-page bearing this date.
[592] Unger (40).
[593] Petzholdt (41).
[594] Unger (44).