igig] BASSLER—SPORANGIOPHORIC LEPIDOPHYTE 83 



Sporangia of C. linearifolius attain a length of 18 mm., rivaling 

 those of Lepidostrobus Rouvillei Saporta and Renault, L. Bertrandi 

 Zalessky, and L. kentuckiensis Scott, which range in extreme 

 length to 16 or 17 mm. It would seem probable, therefore, that 

 we are deahng with a relatively efhcient type of cone. 



Systematic position of genus 



In the discussion of the relation of this genus to others of the 

 Paleozoic we shall use the terminology of the systematic arrange- 

 ment of the vascular cryptogams proposed in 19 15 by Berry (3, 

 4) , and it may be prudent to give here very briefly, without annota- 

 tion, the part of this classification which will concern us presently. 

 The phylum Pteridophyta no longer embraces all the vascular 

 cryptogams, but is restricted so as to include only the Filicales of 

 the old scheme. The phyla Lepidophyta and Arthrophyta are 

 estabhshed to receive the scale-leaved and the joint-stemmed 

 vascular cryptogams respectively, thus: 



PHYLUM LEPIDOPHYTA 



'Lycopodiales of literature (referred to in this paper as 

 the Lycopods) 



PHYLUM ARTHROPHYTA 



Lycopodiales 



Lycopodiaceae 



Selaginellaceae 

 Lepidodendrales 



Bothrodendraceae 



Lepidodendraceae 



Sigillariaceae 

 Isoetales 

 Psilotales 



Class Sphenophyllae 

 Sphenophyllales 

 Class Calamariae ] 



Calamariales lEquisetales of literature (excepting a few of the more 



Pseudoborniales | ^^^^^^ contributions) 

 Protocalamariales J 



In Cantheliophorus the sporophylls are arranged spirally upon 

 the axis of the cone, and the slender, simple, uninervate sporophyll 

 laminae show upon the under surface 2 lateral longitudinal grooves 

 like the characteristic stomatiferous grooves of the usual paleozoic 

 Lycopod leaf. Upon such evidence we must place this genus 

 among the Lepidophyta, and we may have further evidence in 



