E. b 
a 
. 822 ON “ TYLOSES,” THE CELLULAR FILLING UP OF VESSELS. E 
woody tissue or the anh ine, the medullary rays, but never toa 
wall which is bounded by an adjacent vessel.” ies 
In the ‘Geological Magazine’ for June, 1872, I described and figured 
the eocene fossil wood to which I have already referred, and I also gave 
figures of the analogous structure in the Vine I have availed myself of — 
the kind permission of Mr. Woodward to make use of the plate to illus- 3 
trate these remarks, " 
By a curious accident I chanced upon a paper by Dr. Bowerbank, in 
the first volume of the Transactions of the Microscopical Society of 
London (pp. 16-18), published in 1844, the year before the appearance 
* of that of the Baroness von Reichenbach, in which the origin of the 
cellular contents of the ducts in the eocene fossil wood is discussed. 
The conclusion arrived at with respect to the included vesicles was that, 
“it appears probable that the whole of them may be attributed to a more 
than ordinary development of the globules of the circulation, analogous 
o bserved in Vallisneria and other plants.” 
„Dr. Farre, in a subsequent paper in the same volume, thought that they 
might have originated by a process of “ balling ” similar to that by which 
the endochrome of Nitella, when it begins to decay, breaks up into glo- 
As late as 1865, Lestiboudois has maintained what is practically the 
same view as that of Drs. Bowerbank and s. a paper in the 
* Comptes Rendus” for that year, which is translated in the Annals and 
agazine of Natural History, he states (p. 37 9) that “the bem 
Ul $e 
a more or less T 
not have been produced unless the vascular tube 
liquid containing organic materials in solution.” 
* ET 
am unable at the present time to examine these papers in detail, all a 
as 
: un 
bulging of a wood-parenehymatous, or medullary-ray cell forced throu 
A pore in the vessels." Reess’s views and figures are quite consonan 
* Bitzungsber., K. K. Akad. d, Wissensch. Vienna, 1867. 
&. 
ie 
