WILLIAMSON : MEMOIRS AND PAPERS. 
109 
On some of the Physiulugical and Morphological features seen in the 
plants of the Coal Measures. Brit. Assoc. Rep., 1876. 
The Ice Age. Lecture at the City Hall, Glasgow. Collins, Sons 
and Co., January, 1877. 
On the microscopic conditions uf a slab from the Mountain Lime- 
stone of Bolhmd. Man. Lit. and Phil. Soc. Proc, vol. xvii., 
1878. 
Insectivorous Plants. Lecture at the Town Hall, Pendleton, Man- 
chester, December, 1878. Juhn Ileywood, Dcansgate, Man- 
chester. 
On the supposed radiolarians and diatoms of the Carboniferous 
Rocks. Brit. Assoc. Rep., 1878. 
On the Botanical afiinities of the Carboniferous Sigillariie. Brit. 
Assoc. Rep., 1879. 
" Dust." Science circa, 1880. 
Episodes in the Life of a Field Geologist. Science circa, 1880. 
Preliminary remarks on the Microscopical structure of Coal. Brit. 
Assoc. Rep., 1881. 
The Evolution of the Paheozoic Vegetation. Nature, vol. xxiv., 
1881. 
Helophyton Williamsonis. Nature, vol. xxv., 1882, 
Les Sigillaires et les Lepidodendrees par W. C. Williamson et M. 
Hartog. Ann. des Sc. Nat., ser. 6, vol. xiii., p. 339, seq. 1882. 
On some undescribed tracks of invertebrate animals from the Yore- 
dale Rocks, and on some inorganic phenomena produced on 
tidal shores simulating plant remains. Mem. of the Lit. and 
Phil. Soc. of xMan., ser. 3, vol. x., p. 19, secj. 1885. 
On the Morphology of the pitcher Cephalotus follicularis. Nature, 
vol. xxviii., 1883. 
The present state of our knowledge of the Vegetation of the Car- 
boniferous Age. Brit. Assoc. Rep., 1883. 
On some anomalous Oolitic and Paheozoic forms of Vegetation (1883). 
Roy. Inst. Proc, 1884. 
Biographical Notice of an eminent Yorkshire Geologist, John 
Williamson. Yorksh. Geol. and Polyt. Soc, 1883. 
On the Morphology of Pinites oblongus (Abies oblongus of Lindley 
and Hutton). Man. Lit. and Phil Soc, 1886. 
