' Bronn.
(28) 'Lethaea Rossica.' Eichwald.
(29) 'Lethaea Suecica.' Hisinger.
(30) 'Palaeontologica Suecica.' Angelin.
(31) 'Petrefacta Germaniae.' Goldfuss.
(32) 'Versteinerungen der Grauwacken-Formation in Sachsen.' Geinitz.
(33) 'Organisation of Trilobites' (Ray Society). Burmeister.
(34) 'Monograph of the British Trilobites' (Palaeontographical
Society). Salter.
(35) 'Monograph of the British Merostomata' (Palaeontographical Society).
Henry Woodward.
(36) 'Monograph of British Brachiopoda' (Palaeontographical Society).
Thomas Davidson.
(37) 'Graptolites of the Quebec Group.' James Hall.
(38) 'Monograph of the British Graptolitidae.' Nicholson.
(39) 'Monographs on the Trilobites. Pteropods, Cephalopods,
Graptolites,' &c. Extracted from the 'Systeme Silurien du Centre
de la Boheme.' Barrande.
(40) 'Polypiers Fossiles des Terrains Paleozoiques,' and 'Monograph
of the British Corals' (Palaeontographical Society). Milne
Edwards and Jules Haime.
CHAPTER XI.
THE DEVONIAN AND OLD RED SANDSTONE PERIOD.
Between the summit of the Ludlow formation and the strata which
are universally admitted to belong to the Carboniferous series
is a great system of deposits, to which the name of "Old Red
Sandstone" was originally applied, to distinguish them from certain
arenaceous strata which lie above the coal ("New Red Sandstone").
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