KIDSTON : 
THE FLORA OF THE CARBONIFEROUS PERIOD. 
225 
Plate XXXV. 
Fig. 1. Pinnularia columnaris Artis. sp. Crophead Pit, Sauchie, 
near Alloa, Clackmannanshire. Lower Coal Measures 
[2815]. Three-fifths natural size. Probably the 
rootlets of a Calamite. 
Fig. 2. Calamitina apjjroximata Brongt. sp. Woodhill Quarry, 
Kilmaurs, Ayrshire. Lower Coal Measures [1551]. 
Three-fifths natural size. At a is seen the cast of 
the pith cavity, and at b the impression of the 
vascular cylinder. 
Fig. 3. Calamites Suckowii Brongt. Oaks Colliery, near Barnsley. 
Middle Coal Measures [2218]. Three-fifths natural size. 
Collected by Mr. W. Hemingway. Pith cast of stem 
a, giving off another stem b, also only represented by 
the pith cast. At c are seen some rootlets. 
