THE ERIAN PR DEVONIAN FORESTS. 



08 



fronds, apparently bearing on parts of tho main stem or 

 petiole small rounded sporocarps. They are found abun- 

 dantly in tho Middle Erian of tho State of New York, 

 and also occur in Scotland, while one species api)ears to 

 occur in Nova Scotia, as high as the Lower Carboniferous 

 (Figs. 17, 18). 



These organisms have been variously referred to Lyco- 

 pods, to Alga3, or to Zoophytes, but an extended compari- 



Fio. 18. — Ptilophyfon TJiomaoni (Scotland), a, Iinprossion of plant in 

 vernation, o, Branches conjecturuliy restored, c, Bruuches of Zyco- 

 podites Miller i, on same slab. 



son of American and Scottish specimens has led me to 

 the belief that they were aquatic plants, more likely to 

 have been allied to Rhizocarps than to any other group. 

 Some evidence of this will be given in a note appended 

 to this chapter. 



