30 IN MEMORIAM : WILLIAM CRAWFORD WILLIAMSON, LL.D., F.R.S. 



appeared papers ' On the Structure of Stigmaria ' ; ' On Some Fossil 

 Seeds'; 'Corrections of the Nomenclature of Objects Figured in a 

 Memoir on Objects from the Mud of the Levant' (1875); 'Recent 

 Researches into the Organisation of Some of the Plants of the Coal 

 Measures 7 ; 'On Some of the Physiological and Morphological 

 Features seen in the Plants of the Coal Measures' (1876); 'On the 

 Microscopic Conditions of a Slab from the Mountain Limestone 

 of Holland ' ; ' On the Supposed Radiolarians and Diatoms of the 

 Carboniferous Rocks' (1878); and ' On the Botanical Affinities of 

 the Carboniferous Sigillarias ' (1879). 



In 1880 he was happily relieved from the Zoological department 

 of his professorship, and enabled to concentrate his energies on 

 Botany alone. 'Episodes in the Life of a Field Geologist' (1880); 

 Preliminary Remarks on the Microscopic Structure of Coal; 'The 

 Evolution of the Palaeozoic Vegetation' (1881); 'On Helophyton 

 Williamsonis' (1882); ' Les Sigillaires et les Lepidodendries ' was 

 written for Les Annales des Sciences Naturelles, 1882, in conjunc- 

 tion with M. Hartog. 'On the Morphology of the Pitcher of 

 Cephalotus folliadaris* ; 'The Present State of our Knowledge of the 

 Vegetation of the Carboniferous Age'; 'On Some Anomalous Oolitic 

 and Palaeozoic Forms of Vegetation'; 'Biographical Notice of an 

 Eminent Yorkshire Geologist — John Williamson ' (1883). 



The year 1883 was signalised by the conferring on him of the 

 LL.D. of Edinburgh ; then came a paper • On Undescribed Tracks of 

 Invertebrate Animals from the Yoredale Rocks, etc/ (1885). This 

 year the Royal Academy of Gottingen made him an honorary 

 member. Before referring to the publications of the next decade it 

 may be interesting to refer to Williamson as a lecturer. In 187 1 he 

 lectured on the Natural History of Paving-Stones at the Hulme Town 

 Hall, Manchester; in 1874, at the same place, on Earthquakes and 

 Volcanoes; in March 1875, he lectured at the City Hail, Glasgow, 

 on the Dawn of Animal Life ; and at the same place, in Noveml r 

 of the same year, on Coal and Coal Plants ; again, at Manchester in 

 1876, on the Succession of Life on the Earth; in 1877, at the City 

 Hall, Glasgow, on the Ice Age ; and in 1878, on Insectivorous Plants. 

 at the Town Hall, Pendleton. The lectures here enumerated were 

 all published, but a great many of a somewhat less formal character 

 have not been preserved. As a lecturer, Dr. Williamson was one oi 

 the most popular of the Gilchrist band : his clearness, vivacity, hi 

 hearty, straightforward, racy language, his facile use of the chalk on 

 the blackboard, drew to him large audiences, especially amongst tht 

 hard-headed, shrewd toilers of the northern towns. It was at these 

 lectures that some of his co-workers among the coal flora first made 



Natural!**- 



