We shall pass over here the labours of Adam Sedgwick (1785-1873) and Sir Roderick Murchison (1792-1871) in the Palaeozoic of England, which because of their close relation to stratigraphy more properly concern geology; but must mention the grand contributions of Joachim Barrande (1799-1883), published in his Systeme silurien du centre de la Boheme, the first volume of which appeared in 1852.
(Mem.), pp. 569-635, 1894; C. Malaise, " Etat actuel de nos connaissances sur le silurien de la Belgique," Ann.
Barrande's Systeme silurien (1887 and 1899); P. H.