Manchester Memoirs, Vol. li. (1907), No. 8. 



VIII. The Parichnos in the Lepidodendraceae. 

 By F. E. Weiss, D.Sc, 



Professor of Botany in the University of Manchester. 

 Read December nth, igob. Received for publication February ijck, igoy. 



The term parichnos (from 7rapa = beside and '[yyoQ — 'a. 

 footprint) was used by Bertrand ('91) to describe two 

 lateral prints on the leaf scar of the Lepidodendraceae 

 which stand on either side of the vascular bundle. These 

 marks can be clearly seen on any well preserved leaf 

 scar both in Lepidodendron and in Sigillaria (see Text- 

 figs. 1 and 2). 



Fig. 1. — Leaf liases of Lepidoden- Fig. 2. — Leaf bases of Sigil- 



dron showing leaf scars with marks of /aria showing similar marks on the 

 vascular bundle {v.b. ) and of parichnos leaf scar, 

 strands (par). The ligular pit is also 

 seen (lig.p). 



At first these lateral marks were supposed to be the 

 scars of lateral bundles given off in the leaf base by the 



April 2jrd, IQDf. 



