870 PROFESSOR A. C. SEWARD AND MISS N. BANCROFT ON 
description. The branched shoot, 1 cm. in diameter, contains a crushed stele, approxi- 
mately 1°5 mm. broad, separated by an irregular space from the partially preserved 
broadly triangular imbricate leaves some of which show on the exposed face numerous 
small longitudinal ridges such as characterise the foliage of many Brachyphyllum™* and 
Pagiophyllum + shoots. These ridges no doubt mark the position of hypodermal 
strands (cf. fig. 4, Pl. I.). The shattered xylem shows some spiral bands on the inner- 
most tracheides, but no pits have been recognised on the walls of the metaxylem 
elements. ‘The medullary rays appear to be one-cell deep. The pith consists of 
parenchyma with a few scattered thick-walled cells. 
The short fleshy leaves have a well-protected epidermis succeeded by a compact 
tissue of cells elongated at right-angles to the surface, many of them containing a dark- 
brown substance ; occasional groups of elongated thick-walled cells occupy a hypodermal 
position (fig. 4). ‘The rest of the mesophyll is composed of imperfectly preserved 
parenchyma including a few large elements with dark contents, probably secretory sacs, 
and an occasional piece of a leaf-trace. ‘The most striking feature is the occurrence of 
groups of reticulately pitted isodiametric tracheze (figs. 2-4, t) identical with the 
transfusion tracheze in the leaves of recent Conifers. As seen in fig. 4, those trachez 
groups bear a very close resemblance to the transfusion elements in the leaves of 
existing species of Araucaria,{ especially.in the upper part of the leaves, where the 
short trachez replace the water-conducting tracheides. In the piece of lamina shown 
in fig. 2, Pl. L, the transfusion tracheze form a continuous band, ¢, abutting on the 
palisade tissue, p, and internal to this is a very imperfectly preserved vascular strand. 
In the longitudinal section represented in fig. 3, the thick-walled epidermis is succeeded 
by a single layer of hypodermal cells and short palisade tissue; the greater part of the 
mesophyll is destroyed, but there are a few groups of transfusion trachez, t, and 
portions of strands of long and narrow tracheides. There are cells with dark contents 
in the pith and in the mesophyll of the leaves, but, with the exception of a secretory 
duct near the outer edge of the xylem, as seen in longitudinal section, no well-defined 
canals have been detected ; butzthis may be due to imperfect preservation of the tissues. 
Three groups of transfusion trachez are seen at t, fig. 4, and in another leaf five such 
groups occur. In a few leaves in which the superficial tissues are cut tangentially, 
stomata are clearly shown (text-fig. 5, A, p. 884), and it is interesting to find that 
they bear a very close resemblance to those of Brachyphyllum macrocarpum described 
by Jerrrey.§ In both species there appear to be four accessory cells surrounding the 
ouard-cells. 
The Kathie specimen agrees in many respects with Brachyphyllum macrocarpum 
Newb. as described by Houtick and Jerrrey from strata in Staten Island referred to 
a Middle Cretaceous horizon. The leaves are of the same form and agree in certain 
anatomical features. Strands of hypodermal cells occur in both species, also palisade 
* Honxick and Jerrrey (09), pl. ix. + SEWARD (04), pl. v. fig. 3. 
{| Bernarp (04), figs. 87, 88 ; Sewarp and Forp (06), fig. 20, p. 349. § Jurrrey (10), pl. lxv. figs, 5-8. 
