H. S Holden. 
253 
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Spring.” (Musee bot. de Leide, vol. II., 1877). 
f 
,, “ Etudes sur lcs Lycopodiacees.” (Annales d. Jard. bot. de Buiten 
zorg, vol. IV., 18S4 ; vol. V., 1886; vol. VII., 1888; 
vol. VIII., 1890). 
Velenovsky. “ Vergleichende Morphologic der Pflanzen,” Part I., Prague, 
1905. 
Waage. “ Ueber haubenlose Wurzelnder Hippocastanaceen und Sapindaceen.” 
(Berichte d. deutsch. bot. Ges., vol. IX., 1891). 
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d. naturlist. Foren. i Kjobenhavn, 1874). 
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lepidophylla Spring.,” Breslau, 1890. 
NOTE ON A WOUNDED MYELOXYLON. 
By H. S. Holden, B.Sc. 
(Lecturer in Botany in the University College , Nottingham). 
[Text-Figs. 17, 18a, 18b]. 
fl^HE question of the powers of healing and of wound tissues 
generally in Cryptogams, and indeed in all groups below the 
Coniferae, seems to have received scant attention, a fact perhaps 
partially explicable by their lack of economic interest. 
Even where mentioned, as in Goebel’s “ Organography ” or 
Masters’ “ Teratology,” the case of insect wounds or wounds of a 
very severe character ( e.g ., amputations) are alone touched upon. 
In the case of fossil plants the paucity of material, and especially 
of material in an adequate state of preservation, has rendered any 
addition to the known records of wounded tissues of peculiar 
interest. 
Up to the present there are, as far as can be ascertained, only 
three known cases, namely one mentioned by Professor Seward, in 
the first part of his “ Fossil Plants,” one by Dr. M. C. Stopes, 
both dealing with wounded Calamite stems, and the case, recorded 
in a previous issue of this Journal, by Professor Weiss, of a wound 
tissue in a Stigmarian rootlet, developed as a result of the attack of 
a fungal parasite. 
It is thought, therefore, that the present instance, coming, as 
it does, from a group from which no previous cases have been 
recorded, may be a useful addition to the subject. 
The petiole to be described in the present paper was discovered 
whilst examining the “ Myeloxylon ” slides of the “ Cash ” and 
“ Hick” collections in the Manchester Museum and is, unfortunately, 
represented only by a single transverse section (R 677) cut from 
