CHAP. I. 
CELLULAR TISSUE. 
17 
ders. Of this nature are the reticulated cells of the seed-coat 
of Maurandya Barclayana, Wightia gigantea, and the like. 
(Plate I. fig. 11.) 
3. Fibres running spirally close together, except at certain 
places where they separate and leave between them small 
spaces, which appear like dots. 
4. Fibres running spirally, but completely grown together, 
except at certain spaces where they separate and leave small 
dot-like spaces. This and the last have been noticed- by Mr. 
Valentine in Orchidaceous plants, and have been extremely 
well figured by Slack. ( Trans. Soc. Arts, vol. xlix. t 6. 
f. 5, 6.) 
5. Fibres running straight along the sides of truncated 
cylindrical cells in the anthers of Richardia africana (Calla 
aethiopica) and many other plants. (Plate I. fig. 13.) 
6. Fibres running transversely in parallel lines round three 
of the sides of prismatical right-angled cells, in the anthers 
of Nymphaeaceae, &c. 
7. Fibres very short, attached to the sides of cells of various 
figures, to which they give a sort of toothed appearance, as in 
the anther of Phlomis fruticosa and other Labiatae. (Plate I. 
fig. 15.) 
The last three were first noticed by Purkinje. 
8. The fibre twisted spirally, in the membranous tubes 
that form the elaters of Jungermannia, apparently constitutes 
another form of tissue of this order (Plate I. fig. 17.), and 
has recently been found by Corda among Fungi in the genus 
Trichia. 
B. Fibre without Membrane. 
It is not improbable that this form is always in the begin- 
ning of its growth composed of membrane. Mirbel has shown 
that the curious cells which line the anther of the common 
gourd are continuous membranes till just before the expansion 
of the flower, when they very suddenly enlarge, and their 
sides divide into narrow ribands or threads, curved in almost 
elliptical rings which adhere to the shell of the anther by one 
end; these rings are placed parallel with each other in each 
c 
