BY ALEX. G. HAMILTON. 775 



(3) The palisade-parenchyma, consisting of long cells, arranged 

 in two layers, and very full of chloroplasts. 



(4) The spongy parenchyma, denser here than elsewhere in the 

 leaf, but yet more open than in Pennantia or Coprosma. It has 

 a layer of tannin-sacs, but not very rich in tannin 



(5) The inner epidermis, thick-walled and with brown contents. 



(6) The cuticle, through which project hairs, without stomata. 

 The floor has cuticle, epidermis, spongy parenchyma (denser than 

 that in the roof), epidermis, and outer cuticle. The stomata in 

 the lower epidermis extend to the -sery edge of the mouth. 



The brown contents of the epidermal cells ai^e found all over 

 the leaf, and appear solid and squarish in outline. The hairs of 

 the domatium have also brown contents, often broken up so as to 

 resemble a string of beads. 



YiTBX LITTORALLS, Forst, — Mr. E. Betche discovered that the 

 herbarium specimens of this plant in the museum of the Sydney 

 Botanical Gaixlens, collected in New Zealand by Mr. T. Kirk, 

 have well marked domatia, but on examining the growing plant 

 in the gardens none could be seen. Many domatia-bearing 

 plants show this inconstancy, but I have not been able to trace 

 the cause. It must be remembered, however, that young leaves 

 show nothing but the depression in the angle, to the naked eye, 

 or even to the hand lens. In this way I think it happened that 

 a plant of Hodgkinsonia to be referred to was recorded as being 

 without these structures. From the above causes I am compelled 

 to speak only of dried material of this species. The opening is 

 circular, the rim very much thickened, and the domatium projects 

 beyond the surface of the leaf both above and below. They are 

 placed in the main axils and are 4-8 in number. I attempted 

 sections after prolonged soaking in glycerine with a little sjDirit, 

 and succeeded in cutting them fairly thin, but the cells were much 

 distorted, and I could only see that the arrangement of layers 

 resembled that in other plants, and that there were no hairs in 

 the cavity ov round the orifice. 



PsYCHOTRiA Carronis, C. Moore, et F.v.M. — I have seen only 

 herbarium specimens of this plant. The domatia occur in the 



