Mr Xidston on British Carboniferous Lycoipods. 93 



The leaf-scars in this genus are very small and provided 

 with three punctiform cicatricules. On the young growing 

 branches the leaf-scars of some of the species are close 

 and surrounded by a Zepidodendroid-like " field," but this 

 entirely disappears on the larger stems where the leaf-scars 

 are distant ; the surface of tlie bark between the leaf-scars 

 is beautifully ornamented by delicate lines and granula- 

 tions. 



In B. punctatwn the fruit has evidently been borne in 

 lateral cones, from which originate the two vertical rows of 

 large Ulodendroid scars; and one marked feature which 

 distinguishes the large scars of Bothrodendron from those 

 of the other Ulodendroid Lycopods is, that in Bothrodendron 

 the umbilicus of the large scar is eccentric, whereas in the 

 Ulodendroid SigillaricB and Lepidodendra the umbilicus is 

 central or approximately so. 



In B. ininutifoliuni, Boulay, sp., the fruit is borne in long 

 narrow cones at the terminations of the branches. The only 

 specimen of the fruit of this genus which I have yet seen 

 was collected by Mr W. Hemingway at Monkton Main 

 Colliery, near Barnsley, Yorkshire, in shale over the 

 " Barnsley Thick Coal." This specimen he has kindly 

 forwarded to me for examination. The cone is attached to 

 a stem, which still bears the foliage of the species. 

 Unfortunately the cone is imperfect in its upper part, so 

 its full length cannot be determined. The portion pre- 

 served is 3 J inches long, and at its thickest part rather over 

 ^ inch wide. The central axis in the compressed cone is 

 seen to give off at right angles a number of transverse bars, 

 which probably represent the basal portions of the bracts, 

 that bore the sporangia. Their leafy extension rises up at 

 almost right angles to their basal portion, and is therefore 

 nearly parallel with the axis. These bracts are closely 

 placed, as many as eleven being contained on the axis in 

 the space of half an inch. The specimen is shown nat. size 

 in PL IV., fig. 6. 



I have received a very interesting specimen of a portion 

 of a stem of B. minutifolium from Mr Landsborough. The 

 lower part of this specimen is decorticated, and shows the 



