RESEARCHES ON PROTOPLASMIC CONTINUITY. 313 



very narrow, so that only reticular threads or one or two series 

 of meshes find room in them, but they sometimes attain greater 

 breadth." 



On page 10, when speaking of the mode of formation of the 

 cell wall from the protoplasm — " And this view is also sup- 

 ported by the occurrence here and there observed of chloro- 

 phyll grains and coloured portions of nets, not only in the 

 crevices, but also in the substance of the partition walls into 

 which they appear as it were forced." 



On page 11 the following statement occurs : — " In the latter 

 (i. e. the cuticle) chlorophyll corpuscles are deposited here 

 and there." 



The next quotation, on page 17, refers to Dracaena Draco: 

 " The partition walls separating the epidermal cells from one 

 another and from the subjacent cells may, for a short distance, 

 lose their brilliancy, but interruptions of continuity are more 

 frequent which either appear isolated, or three or five of them 

 on one partition wall; are partly very narrow, partly wider ; 

 may reach the diameter of a chlorophyll* grain, and are tra- 

 versed by isolated threads, or by narrow reticular bands, fre- 

 quently showing isolated thickened threads and nodes, by 

 means of which neighbouring cells are in connection." 



Again, page 21 : " Narrow cracks and wider crevices, 

 reaching the diameter of a chlorophyll granule, or of a 

 nucleus, may occur with varying frequency." 



On page 29, referring to the epidermis of Crocus and 

 Hyacinthus: "The threads of the neighbouring reticular 

 layers are sunk into the membrane, while in places where 

 cracks and crevices appear on the partition walls, the threads 

 extend through them, and connect the nets of neighbouring 

 cells with one another." 



Lastly, on page 38 : " But continuous roundish or band- 

 sViaped lamellse are also deposited in those layers of membrane 

 which shut off the epidermis cells towards the outside, and 

 may appear on their surface, and be enclosed in their texture, 

 and as further in them as well as in the thicker partition walls 

 chlorophyll grains also occur, it can admit of no doubt that 



