une 
69 BOTANICAL GAZETTE. [ June, 
j e, 
the vegetation became more pronounced, and we pee oe 
Sigillariex, Lepidodendres, etc., in comparative abun " Be 
| not, however, agree with the author that the Taxines The eae 
a Testes the Devonian, or, indeed, into the Ra ngraaine ' Cre 
scribed as Dadoxylon undoubtedly represents the wood 0 Beigh s. 
is shown by the fact that they all possess an gate vi Pa 
~ bordered pores covering the entire radial walls of the trac . - ee 
: isa typical paleozoic genus which is allied to the sheer hod be Ont 
and the conifers on the other, and the characters as esta ga ener 
pi ’Eury and Renault, who have so successfully worked thes Pale: 
material, agree with all of Dawson’s species Laser wicrsioe 
gracilis, thought to represent the leaves of a species of Dadoxylon, 
aes st ies of Walchia, a Permian genus. os 
: we sd a ike point is the relationship of the Sigillariez. Since 
ie * 
ae - es and 
_ the discovery by Zeiller of cones containing both microspor 
be fulfilled 5 Sir 
ee. Ty speaking of the transition from cryptogams to pepe 
William thinks it probable that these have been their sep ©) joni 
ort “one leading from the Lycopods by the Sigillarieze, anot. os pene 
ff Cordaites, and the third leading from the Equisetums ss se ia 
=. mites.” After making this unequivocal admission he ames oy 
~ | » say: “Ido not make these remarks in a Darwinian sense, so Hie nae 
State what appear to be the lines of natural affinity, and the 
o4 
+s 
ge > a wn Sa ene 
* cf 
: evo- 
_ in this state of scientific thought that a denial of the pores poe ri 
lution, especially in a work on the development of LEE 
deemed expedient. ic and 
The remaining chapters of the work are devoted to pence to 
Tertiary vegetation, and as the deposits containing these happe 
be very well develo 
comes in consequen 
_ the whole work « 
“with the imperfe 
the author.” 
eee 
Bs 2 
alee ithout ex 
me The illustrations, about eighty in number, are, ne. be author. 
| €eption, from earlier published works on Canadian plants by 
' The Flora of Miquelon. d known 3 
___ The double island off the south shore of aageneero and the 
Miquelon has been pretty thoroughly explored by Dr. Delamare, 
: ture,and 
the admirable researches of Williamson on the internal structure, 
incredible 
ing to give unity to the system of nature.” It seems almost in 
