viii List of Woodcuts. 



PAGE 



Cochleosaurus Bohemieics, dorsal view 480 



^'keieion oi Halitherium Schinzi,'K3MiY 413 



Skeleton of iS^^ewa^'Jp''''*, Zimmermann, 1780 417 



Map illustrating the Geographical Distribution of the Sirenia 433 



Dichograptus oeioh'achiatus, Hall 449 



Didymograptus vacillans, Tullberg 452 



Dicellograptits Forchhammeri, Geinitz 452 



Dieranograptus ramosus, Hall 452 



Diplograptus angustifolius, Hall 452 



Monograptus gregarius, Lapworth 452 



