1014 REPORT—1896. 
Taste 1V.—Vypes of Sonchus spinosus or Zilla myagroides. 
Lepidium 15. p . Palestine Sisymbrium 17 A . Australia 
Matthiolall . : . Greece and arid coun- Zilla . “1 5 . Egyptian desert 
tries | Delphinium 10 4 . Waste places, Darda- 
Oudneya . A . . Algerian deserts nelles 
Farsetia linearis. . Egyptian desert + antheroidenm Dry sandy places 
co zegyptiaca > » t 
TasLeE V.—The Aptosimum Type. 
Sisymbrium 20,21 . . Spain, Syria Matthiola humilis , 4 Egyptian desert 
Alyssum 26,27 . : . Sunny places, Orient Fumaria 20 . . s Greece 
Matthiola acaulis . . lgyptian desert 
TasLeE V1.—Small-leaved or Retama-like Plants. 
Delphinium 14 . : . Leaves reduced . 2 . Desert 
es nanum . 5 a 5 ; : . Stony places 
Za Balas . s > absent . 5 . Desert 
ae virgatun " » itew 4 5 . Sandy waysides 
a Sal tr 5 : » very few 5 - Desert 
Lepidium 15 F : ; - - 5 ‘ . Palestine 
Parsetia linearis A : » reduced . Bi . Egyptian desert 
bs eegyptiaca = “A an . . a “A 
Cardamine 12. : : - an 5 4 . Plaines marceageuses 
Sisymbrium 3 é A Bem, = = . Syria 
= 9,11 ; . Rigid virgate shrub . . Spain 
tS 25 4 - “i » s ; . Arabia, Palestine 
Iberis, 25 ‘ : . Nearly leafless variety . Caleareous soil in hot countries 
3. A Discussion on the Movement of Water in Plants was opened by 
Mr. Francis Darwin, F.R.S. Mr. Darwin’s Paper was ordered by 
the General Committee to be printed in eatenso. See Reports, p. 674. 
SATURDAY, SEPTEMBER 19. 
The following Papers were read :— 
1. Changes in the Tentacle of Drosera rotundifolia, produced by Feeding 
with Egg Albumen. By Lity H. Huis, Physiol. Labor., Oxford. 
{Communicated by Dr. Gustay Mann. ] 
In unfed leaves fixed in watery picro-corrosive (sp. gr. 1020) and stained with 
Eosin-Toluidin blue, the apical and lateral glands of the first or outer layer and 
also all the cells of the second or middle layer show a deep-blue cytoplasm, with 
nuclei possessing little chromatin proper, but large nucleoli and a granular nucleo- 
plasm. Within one minute after feeding the blue cytoplasm becomes purple ; 
after one hour it is greatly vacuolated and reddish purple ; after twenty-four hours 
the blue material has disappeared, and only a few strands of a pink cytoplasm are 
to be seen. The nucleus after feeding loses the granular cytoplasm, the nuclear 
chromatin segments enlarge enormously, reminding one of the early stages of 
mitosis. The nucleolus has lost its red chromatin, and is not easy to see. 
Recuperation of the cytoplasm is the result of nuclear activity, for the chromo- 
somes enlarge during the period preceding the appearance of the granular nucleo- 
plasm, which latter in every respect resembles the granular deposit of cytoplasm 
in immediate contact with the outer surface of the nuclear membrane. The 
cytoplasm is at first purple in colour, but becomes blue after 6-7 days. After the 
‘secretion’ of the cytoplasm the nuclear chromatin segments diminish in size, 
while the nucleoli become more and more evident, and the nucleoplasm has the 
same appearance as in a leaf which has never beenfed. The third layer of gland- 
cells, perhaps concerned in the secretion of mucus, also shows marked changes ; 
for the long spindle-shaped nuclei of the resting condition shorten within one 
