xxix] 



LYGINOPTERIDEAE 



53 



Hoeninghausi group, a difficulty that is illustrated byDr Gothan's 

 statement^ that the Dudley specimens of Crossotheca are not 

 identical in the character of the sterile pinnules with Sphenopteris 

 Hoeninghausi.. An examination of Dr Kidston's specimens led 

 me to agree with his determination ; but, it may be asked, have 



"••viSiiy 



JTiG. 407. A, B. Crossotheca Hoeninghausi. 

 C. Pinnule with a sporangium, ;i. 

 (A, Kidston CoU. 1277; B, after Kidston; C, Camb. Botany School. 508.) 



we any evidence of the association with Lyginopteris fronds of 

 sporangia other than those of the Crossotheca type? Prof. 

 Chodat^ believes that certain petrified fragments of pinnules 

 occasionally met with in the calcareous nodules bearing sessile 

 and apparently annulate sporangia belong to Lyginopteris fronds. 

 These sporangia appear to be identical with those named by 



1 Gothan (13) p. 49. 



2 Chodat (08) B. 



