[MATTHEW] CLIMATIC ZONES IN DEVONIAN TIME 133 
Lanark- |Caladon—| Orcad- 
i i ian. 
ian. lan. 
(Lower) |(Middle) | (Upper) 
Pallaphyton prince ps, OAWSONG si) ayo fies ca ae d= |A LR De ve 
Lycopodites Reidii, Penhallow........ SP IRS CASA ERA CN DST EN | 4 
Parkeria decipiens, Fleming, vars. media and minor ..|........ x 
ÉAGRNITRE CAPTEUR RUN A a Maa en an ne VL Le A Tt RA x 
ATID LOS LEO À PR ANT Er EAN Or A A LEO Le LU * 
Zosterophyllum myretonianum Pen................. X x 
As in the previous lists this shows two groupings, some (the upper 
in the list) with dense woody tissues; others (the lower), with more succu- 
lent parts, and probably fitted for aquatic or palustral life. It is stated 
that Sir William Dawson identified the last named species with his 
Cordaites augustifolia which as we have remarked above, resembles 
closely a supposed Maritime plant from the Silurian of southern New 
Brunswick. | 
The Upper Devonian of Belgium. 
The Belgian area of Devonian and Lower Carboniferous rocks owing 
to the alternation of marine and littoral, or even terrigenous deposits, 
affords data for arriving at the exact age of the Devonian land plants 
that many other regions do not give. 
The late Francis Crepin described some plants from the Upper 
Devonian of Belgium in 1874*. They were found in the grauwacke 
of Condroz in quarries at Esneux near Comblain-la-Tour. There were 
large stems referred to Calamites and branching axes of Pinnularia. 
Among thousands of fragments M. Crepin found only four recognizable 
species, two of which Palewopteris [Archæopteris] hibernica and Triphyl- 
lopteris elegans were already known, and the others, Psilophyton con- 
drusorum} and Sphenopteris flaccida he described as new species. 
Of the Psilophyton named the branches and fruit are shown, and 
the former are divided into sterile and fruit bearing branches. If one 
should compare these remains with those of an undescribed related 
genus of the Silurian of New Brunswick he would be inclined to give a 
somewhat different interpretation to some of them, than that given by 
the original describer. Figure 2 of plate I, where the branches show 
*Quelques plantes fossiles de l’Etage des Psammites du Condroz. Bull. de l’Acad. 
Roy. de Belg. 2nd Ser. vol xxxviii No. 8, Aug. 1874. 
TR. Kidston says this is not a Psilophyton; Crepin afterward made it a new 
genus, Rachophyton. 
