vis Bunbury (2). It is well to note that Stockmans (15 ) 
identifies the Mazon Creek representatives of Neurop- 
teris rarinervis with Neuropteris attenuata Lindley and 
Hutton. However, I am inclined to dismiss Neuropteris 
attenuata as of no more than varietal importance. 
In the Lesquereux collection there are one hundred 
and thirty specimens of Codonotheca caduca which were 
identified as Mquisetites occidentalis (11). Since there are 
certain calamarian leaves also included in the type series 
of Lesquereux, Sellards’ name should stand and no at- 
tempt should be made to reinstate Lesquereux’s specific 
name. There are sixty-two specimens of Codonotheca ca- 
duca in the F.O.Thompson collection. 
Sellards had to deal with detached fructifications from 
which no evidence concerning arrangement could be ob- 
tained. I have illustrated in the first figure how the ter- 
minal sporangiate structures are borne pendulously on 
pinnatified branches. here are four pairs of synangia 
arranged almost opposite. Several other smaller and more 
fragmentary branches are known, but these show the 
same opposite, pendulous and paired arrangement. 
Each campanulate staminate structure has six long 
tubular sporangia filled with large pollen-grains imbed- 
ded in the tissue. In this respect, Codonotheca belongs to 
the same group as Whittleseya. Halle (7) interprets Co- 
donotheca as follows: ‘‘Specimens of Codonotheca caduca 
of average size are stated to be 8-5 em. long and 13 em. 
wide at the top. The segments are free for about half of 
the length of the specimen, or somewhat less. The spores 
are described as forming long and narrow groups which 
extend from the tip to the base of each segment and lie 
in more or less well-marked depressions occupying one 
half or two thirds of the width of the segment. Sellards 
states that there is nothing to indicate the location of the 
sporangia, but he evidently thinks that each group of 
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