108 



LYCOPODIALES 



[CH, 



found its way into the interior of a cushion. Each leaf-trace is 

 accompanied by a parichnos strand as in the true Lepidodendron; 

 at the base of the leaf-cushion the parichnos branches into 

 two arms which diverge slightly right and left of the leaf-trace, 

 finally entering the base of the leaf lamina as two lateral strands 

 (fig. 147, p). At one point in fig. 146, D the section has shaved a 

 leaf-trace represented by a black patch resting on the parichnos 



Pig. 147. 



Lepidophloios leaf-cushion in tangential section. (From a section in 

 the Williamson Collection, British Museum, No. 1973.) 



just above the line ef, but it passes through one of the parichnos 

 arms p' which debouches on to the leaf-scar sc at p. Had 

 the section been cut along the line cd of fig. 146, A the leaf- 

 trace would have been seen in a position similar to that occupied 

 by the parichnos p' in fig. 146, D. 



Fig. 147, A, affords a good example of a tangential section 

 through a Lepidophloios leaf-cushion, 1 cm. broad, like that repre- 



