46 DR. D. H. SCOTT ON A NEW TYPE OF MEDULLOSEX 
Mr. James Lomax, by whom the specimens were found. It is an interesting fact, 
however, that I have lately received sections from a different locality, near Colne, in 
Lancashire, sent me by Mr. Peter Whalley, which appear to be cut from petioles of the 
same species. To these specimens, and to the subject of the petiole generally, I shall 
return after describing the stem. 
The first sections of the stem were sent me on October 2nd, 1905, by Mr. Lomax, 
who then described the plant as “a new Medullosa.” A few weeks later he sent me a 
number of other sections, including an extensive longitudinal series. The eleven 
transverse sections in my own possession proved insufficient to form a satisfactory 
series, and I found it necessary to ask for the loan of sections which had been sent to 
other collectors. Prof. F. W. Oliver had, indeed, anticipated my request, and all the 
other friends to whom I applied at once consented, so that altogether I had at my 
disposal seventeen transverse sections, all, in fact, that remained in this country. There 
were four other transverse sections, which had been sent to America or France, and for 
them I did not ask; but it is not likely that they would have added anything to our 
knowledge, the series of seventeen having proved sufficient for tracing the course of the 
vascular strands *. Those whom I have to thank for so kindly lending me sections 
are, in addition to Prof. F. W. Oliver, F.R.S.f, Miss M. C. Stopes, D.Sc., Mr. R. Kidston, 
E.R.S., Mr. W. H. Sutcliffe, F.G.S., Mr. W. Watson, and Prof. F. E. Weiss, F.L.S. 
Mr. Lomax informs me that the fragment of stem was about 9 inches (23 em.) long. 
The sections examined, however, only cover a length of about 6 inches (15 em.). The 
comparatively slight change of structure undergone within this distance indicates that 
the specimen must have formed part of a tall stem, while its transverse dimensions are | 
considerable, amounting to about 12x06:5 cm. in its present condition, in which the  . 
form is no doubt somewhat distorted. i 
The seriation of the transverse sections has been determined, and it will be convenient 
to give a list of them in their proper order, from below upwards. The evidence on 
which the upward and downward directions have been determined will appear from the | 
subsequent account of the course of the vascular strands. "The sections are indicated by | 
the number or letter which they bear, and, in the case of borrowed sections, by the name 3 
of the owner. They are also numbered continuously, from below upwards, with Roman — 
numerals. Sections which I have not seen are not included in this list, but, as far as — 
possible, gaps in the series are noted. 
AMI CONAMUR NNNM , ..  . coU NM. s o ON rs L 
"RI ee uo... ee ne P es Ir 
BAM | 10 s DUM TUA UT SM T NA uS III. 
"AGO. QULS D IV. 
Gap, corresponding to longitudinal sections (O. 36, a, b, c) in Collection at 
University College, London. 
Eo UBDNMFRIOGUETOU. 08. ouo ooo o o vo ocn V; 
Mr. Kidston’s section “1033” . 
* See, however, the Addendum, p. 65. 
+ To whom I am also indebted for the loan of three longitudinal sections. 
