Abietineae (?) from the Cretaceous of New Zealand . 115 
satisfied that one can make reliable deductions regarding affinities, &c., from 
this detail. 
The wood parenchyma is very inconspicuous in transverse section, 
though in a few places it can be recognized. The number of elements is not 
large, and it appears to occur only between the spring elements and the latest 
formed wood of the preceding season (par., Text-figs. 1 and 2). The cells have 
nearly straight end walls, and all their walls are thickened and pitted with 
circular or oval pits. They are seen in Text-fig. %,par., in radial section, but 
they are more conspicuous in the portions of the tangential section which 
happen to pass through the zone between the spring and the last-formed 
Text-fig. 3. Planoxylon Hectori , sp. nov. Radial section through the zone of later-formed 
wood, showing the characteristic ‘ Abietinean pitting ’ of the ray cells and the pitting in the tracheide- 
fields. <?/., pitting of end cells of the ray. pits connecting radial wall of ray and adjacent 
tracheides, note that these are in vertical pairs per tracheide-field, and in some cases distinctly 
bordered. tracheides; cf. PI. IV, Figs. 3 and 5. [Slide No. 52823c, Brit. Mus. (Nat. Plist.).] 
wood of the previous season. In this view they are numerous, and greatly 
resemble Gothan’s Text-fig. 15, p. 29 ( 1907 ) for his Cedroxylon transients. 
The medullary ray cells appear to be all of one kind, though the end 
cells of the ray are sometimes slightly more irregular in outline than the 
others. All the cells have definitely thickened and pitted walls, and these 
are of the typical ‘ Abietinean J type. In transverse section the medullary 
ray cells are seen to tally with two or three of the tracheides, and to have 
straight end cells. In a number of cases their top or bottom walls can 
be seen in surface view, when the numerous round pits in them are very 
apparent (see mp., Text-fig. 1). In radial section the pitting of all six walls 
can sometimes be seen (see Text-figs. 2- and 3, and PI. IV, Figs. 3 and 5). 
The nearly straight or curved end walls and their £ Abietinean ’ pitting are 
seen at ep. in all three figures. The number of pits per tracheide-field varies 
