219 
§ 
1. Unattached, somewhat twisted, 3 cm. in length. 115, 100ths mm, thick at base , 
tapering alight ly. 
2. Tip coiled around another tendril. 35/, em. in length. 145, 100ths mm. thick at 
base, tapering slightly. 
3. In 2'/; tight coils around stem. 2.5 mm. diam., 31/, em. in length. 950 . 240 at 
"$6 4-9 
1st coil., 200 . 195 at Qnd, 
1, Apical portion attached, forming 11/; coils, = 170, basal part not in contact = 110. 
2. Not in contact, base = 90, apex 
3. Not in contact, became disarticulated. 
= 
In a firmly attached, and tightly coiled tendril, the concave 
surface finally becomes flattened, and the lateral diameter exceeds 
slightly the antero-posterior. The growth in thickness is due 
entirely to the increased cambial activity causing the formation 
of a thick wood cylinder. The growth and hardening of the 
attached tendril is somewhat slow, the difference between atta- 
ched and unattached tendrils not becoming perceptible until after 
3 to 4 days, or in some cases even a week, has elapsed, and 
requiring 4 weeks or more for the full increase in thickness 
and sclerotization to take place. After the tendrils are fully 
coiled, if the tip becomes firmly adpressed to the support, it 
swells and forms large irregular brownish flattened attaching 
discs, so that the full development of the tendril, when disc 
formation takes place, may take as long as 2 months. The 
dises may attain a considerable size, when fully developed, and 
may be from 12 to 14mm. in diameter, and from 4 to 6 mm. 
thick at the centre, the margins being much thinner. 
1. Attached tendril, diameter at base 210, near apex 196. Disc. 1 mm. igh ninae 4 thick. 
2. Apical half only attached. » 160, » 195. 4 5 w om 
3. Unattached. w 195, » w« 95. No disc. 
The strongest adult tendril with all three segments coiled and 
with attaching discs supported a weight of 10 kilos but broke 
away with 1]. The applied surface of the disc is not sticky or 
glutinous, and adheres with only moderate tenacity by its close 
application to the irregularities of a rough surface, but with 
greater strength, if it penetrates an irregular crack or fissure. 
A vertical transverse section through the disc shows, that the 
Upper surface is covered by a brown corky layer, beneath which 
is a layer composed of slightly thickened and rather cubical 
