342 J. W. Dawson— Erian Flora of the United States. 



the limits of Canada is Ft. f>hr„ u ] a found by Dr. Honeyman in 

 the Lower Carboniferous of Nova Scotia ; but as Pt. Vanuxemii 

 abounds in the Erian of New York, it will no doubt be found 

 in Canada also. 



II. Note on Erian Trees of the Genus Dadoxtlon, Unger 

 (Araucarites of Gceppert, Ai'<iw,n'i<>,ri/Iou of Krans.) 

 Large woody trunks, carbonized or silicified, and showing 

 wood-cells with hexagonal areoles having oval pores I 



in them, occur abundantly in some beds of the Middle Brian 



wood all the way to the Trias. They have in the older forma- 



ullary rays composed of two or more series of cells, but become 

 rnoiv simple in these respects in the Permian and Triassic 



■ ■'; • ■, inasmuch as they suppose affinities to Araur'tria 



is therefore, I thini 

 and in my Report 



of trees of this kind in the Erian 

 atthew and Hartt, who found la 

 s described as l)ml„x>ihii Ouai»j^< 

 <tor.e of St. John, New Brunswi 

 "Dadoxvhm sand, to. 

 xl was found bv Professor Hall : 

 e Hamilton group of New York i 

 of the genus Ormoxyhn was obtaii 

 Portage group of the former 1 



referred. In m 



y Acadian Geology 



3ology of Princ 



e Edward Island, I 



Ing that the foli 



iage of some at least 



..._. from that of St. 

 and wen 



Ormoxylon Eriauuri). The three species of Jhidnxylnn agreed 

 in having composite medullary v-d\<. and would thus belong to 

 the -roup FaUin.n,!nn of Prongniart. in the case o! '• 

 this character could not be very distinctly ascertained, but the 

 medullary ravs appeared to be simple. 



I am indebted to Professor J. M.' Clarke of Amherst College, 

 Massachusetts, for some well preserved specimens of another 

 species from the Genesee shale of Canandaigua, New York. 

 They show small stems or branches, with a cellular pith sur- 

 rounded with wood of Coniferous type, showing two to three 



