EXTRACTS FROM PEOCEEDTKaS. 
XV 
" The peculiar outgrowths of tliis plant are protruded from 
the young shoots above the axils of the leaves and above the 
branch proceeding therefrom. In the fully developed state 
they are about the size of a large pea, of a yellowish colour, and 
have a general resemblance to the tufts of hair found in similar 
situations in FeresJcia. In the youngest condition the excrescences 
occur in the form of small, smooth, conical projections covered Avith 
an outer layer of small oblong cells, the outer walls of which are 
thickened ; subjacent to these are four or five rows of small, sphe- 
roidal, densely packed cells, ''also cortical in their nature. These 
overlie a mass of ordinary cellular tissue, the cells of which con- 
tain chlorophyll. Eunning into this conical cellular projection 
are two rows of small spiral vessels, which converge towards the 
apex of the cone and form a loop. These spiral vessels are conti- 
nuous with those of the vascular circle of the branch, and are 
surrounded on all sides by oblong thin-walled cells, whose long 
diameter is parallel to that of the spiral vessels, and more or less 
at right angles to the direction of parenchymatous tissue of the 
cortex and also of the medulla. The constituent cells of the me- 
dulla are spheroidal and destitute of chlorophyll. Here and there 
spiral vessels traverse the medulla, quite isolated from the general 
vascular circle. In the more fully developed excrescences the 
appearances are similar, except that the outer epidermal cells now 
show themselves in the form of long cylindrical cells (hairs), some 
of which are club-shaped at the extremity. Some of these hairs 
appear to be unicellular, while others show one or two transverse 
partitions. The hairs in question are rather thick-walled and 
contain a few scattered, small, highly-refracting granules (starch) 
resembling the granules found in autumn when the leaves have 
assumed their autumnal tints in consequence of the decay of the 
chlorophyll. Prom these appearances, the inference seemed to be 
that the growths in question were of the nature of adventitious 
roots covered by hypertropliied epidermal hairs." 
An Arum, from Chiswick, with an adventitious leaf attached to 
the spadix, and white, like the spathe, was then shown. A similar 
illustration was forwarded some time since by Mr. D. E. Tisk. 
Mr. A. Murray read a communication relating to the presence 
of a larva in the tubers of certain herbaceous perennials. The 
larva in question was that of the Grhost Moth or Golden Swift 
(Hepialus Humidi), and did much damage. Mr. Murray then 
showed a dipterous larva which was attacking Sea-kale roots 
