IV. On the continuity of the protoplasm through the walls of vegetable cells. (;<) 
who like myself was unable to see the threads, with anylhing like the same 
distinctness, that Tangl had represented in his ligures, when seclions of the 
endosperms were treated with Jodine and Chlor. Ziny. Jod. 
In consecjuence of these considerations I determined to turn my atten¬ 
tion to the study of thick-walled cells, and I naturally commenced with those 
of thickened endosperms, which on accounts of their large size and the 
thiekness of their closing membranes, seemed to offer the mosl favourable 
conditions for an investigation of this kind and rendered it extreme]y pro¬ 
bable that such threads as might exist would be easily seen. Of the structure 
of these cells 1 made a fairh detailed examination, although the conclusions 
which were arrived at, will admit of being shortly summed up. By means 
of the methods which I mentioned at the beginning of this paper I examined 
in detail the seeds of some fifty species of Palms, besides those of represen- 
tatives of the following Orders Leguminoseae , Rubiaceae, Myrsineae , Loga- 
niaceae, Hydrophyllaceae, Iridaceae, Amaryllidaceae, Dioscoriaceae, Melan- 
thaceae, Liliaceae, Smilaceae, and Phytelephasieae in all of which I found 
that the cells were placed in communication with one another by means of 
delicate threads traversing the walls of the cells. ’) 
Pa hnea e. 
I. Arecineae 
Areca triandra. Roxb. 
Areca Catechu. L. 
Rhopalostylis Sapida. W. & D. 
Stevensonia grandifolia. 
Duncan 
Howea Belmoriana. Ben. 
Kentia costala. Ben. 
Caryota urens. L. 
Manicaria saccifera. Gaert. 
Didymosperma distichum. 
H. f. 
Pinanga latisecta. Bl. 
Heterospathe elata. Scheff. 
Cyrtostachys Renda. Bl. 
II. Lepidocaryeae 
Calamus calicarpus. Griff. 
Calamus fissus. Bl. 
Mauritia llexuosa. Linn. f. 
Archontophoenix Cunninghamii. 
W. & D. 
Euterpe oleracea. Mart. 
Euterpe edulis. Mart. 
Hyophorbe Verschaffeltii. Wendl 
Synechanthus fibrosus. Wendl 
Calyptrogvne Schwartzii. H. f. 
Calyplrocalyx spicatus. BI. 
Chamaedorea tinella. Wendl 
Prestoea pubigera. H. f. 
Ceroxylon andicola. H. & B. 
Oncosperma horridum. Seem. 
Plectocomia Himalvana. Griff. 
Raphia-Hookeri. M. & W. 
Pigafetta elata. Beee. 
t) I append below a complete list of the endosperms examined. To Sir Joseph 
Ilooker I am indebted for kindly looking over for me and arranging the list of Palms. 
