348 CORRECTIONS IN THE SHETLAND FLORA. 
plants. Nevertheless, its structure does not differ so essentially from 
the vascular eryptogams as to cause any uncertainty as to its position. 
The histological character of its wood, the absence of medullary rays, 
and the nature of its fruit, clearly establish that it was a true crypto- 
gam; and while it differed in the arrangement of the parts of its stem 
in its foliar appendages, and in its organs of fructification from Lepi- - 
dodendron, yet it is evident these were both near allies, and both more 
highly organized than any of their living representatives. 
EXPLANATION oF Pirates LV. anv LVI. 
PraTE LV.—Restoration of Lep and Calamites ; and section of 
stem of Calamites, showing the peice ane the rma oa (Thea xis is pu 
too sender in proportion ‘ Pe thickness of woody cylind 
TE LVI —Fi 1gs. opliiode ndron.— 1. neea section of the half 
i ilus. 
Pasei 2. Longit n of ditto. 3. Strob cale and spo- 
ascular bundle should be produce the apex of the scale.) 
5. Spores. Fig. 6. Scale of Flemingites. Figs. 7-12. Calamites ( udwig) 
7. Strobilus. 8. Pa whorl of strobili. 9. Longitudinal sectio: wo 
n ion t 
cells of astrobilus. 10. Transverse section of onecell. 11. Apex of a spine with 
its four op. 12. Scales from strobilus 
CORRECTIONS IN THE SHETLAND FLORA. 
By Hewerr C. WarsoN, Esq. 
Mr. Ralph Tate has done good service to local Botany by publish- 
ing an amended list of the plants of the Shetland Isles in the * Journal 
of Botany * for January last, No. 37, pp. 2-15. I am told that a full 
set of his collected plants is placed in the British Museum. Through 
the good offices of the Rev. W. W. Newbould another set, less com- 
plete, has been added to my own stores. It seems desirable to correct 
some errors of nomenclature, made evident by the labels which came 
with my set of the specimens, and partly affecting the accuracy of the 
printed list of these plants, 
At the same time, I wish also to point out and correct a remarkable 
mistake in geographie botany, which is unfortunately set forth in the 
paper by Mr. Tate in a manner too likely to puzzle and mislead his 
readers. , Following the six zones of distribution explained in the 
* Cybele Britannica,’ the two lowest are not represented at all in this 
northerly group of islets. But it is stated in the paper of Mr. Tate 
that the four other zones are all represented there, and all within a 
