104 



cells with the bordered pits are the tracheids of the transfusion tissue, and a good 

 xiew is obtained of the empty and filled parenchymatous endodermal cells. The 

 oil reser\-oir is in the left top centre of the picture. Figure loi illustrates a 

 longitudinal section through the upper part of two lea\TS clear of the main axis, 

 and through two oil cavities. The empty parenchymatous endodermal cells are 

 well defined in the centre of the picture, the filled ones making the dark-coloured 

 hnes down the centre of the picture, and almost midway between them and the 

 right oil caWty are the rows of transfusion cells of the leaf bundle and marked 

 by the smaJl circles (bordered pits'' in their lumina. The oil cavities are seen, 

 one on the right and one on the top k-ft-hand side, so that the cavity form of 



Figure 99.— Longitudinal section through 

 junction of a whorl of leaves 

 of C. artnosa, x 65. 



Figure 100. — Longitudinal section ttirough part of central axis, oil 

 caviiv and part of leaf surrounding it ; taken trout Figure 9y 

 The bordered pits of the transfusion tracheids are clearly 

 seen. The oil cavity is in the top left centre backed by 

 the mcsophyll of the leaf. C. aroiosa, x iGo. 



these bodies prevails in this species as throughout the Callitris. The amygda- 

 loidal bodies at the base of the left oil cavity show peculiar depressed markings 

 on the brown manganese compound cell contents, when in direct contact with 

 the oil in the ca\ity. The space at the top is where the succeeding whorls of 

 leaves ha\e been removed. 



(c) Chemistry or Tin-: Li:.\i- Oil. 



The leaf oil of this species was distilled from material collected at i->allma. 

 New South Wales, 340 miles north of Sydney, on 2nd September, 1904, and also 

 at Corrumbian Creek, in the Murwillumbah District, on the borders of New South 

 Wales and Queensland, 410 miles north of Sydney, on the 13th January, igo8. 



