28 



4. The two former families, did they now exist, would 

 supply connecting links between the Coniferse and Cycadese, 

 and between the latter and the Acrogens. 



NOTE TO PAGE 13, SECOND PARAGRAPH. 



With reference to the supposed fruit of Tylodendron, a comparison 

 may also be suggested with the Eocene fossil fruits from the 

 London clay, of the genus Selenostrobus, and with the modern genus 

 Calliiris. In these, however, the fruit presents a verticil of valves en- 

 closing seeds, rather than of naked seeds. In the case of Tylodendron, 

 however, there may have been deciduous scales. The number 

 four apppers in some species of Cattitris. It is five in Selenostrobus 

 and Spondylostrobus. This subject has been discussed, with refer- 

 ence to the Tertiary and modern fruits, by Bowerbank, Endlicher, 

 Heer, Schimper and Von Mueller. 



ADDITIONAL NOTE 



Since writing the description of Dictyocordaites Lacoi, I have seen 

 Nothorst's paper on Dictyozamites of Oldham, a Cycadean genus 

 with netted venation which occurs in the Mesozoic formations of 

 Japan, India and Sweden. 



