878 PROFESSOR A. C. SEWARD AND MISS N. BANCROFT ON 
similar in structure to that from another cone, shown in fig. 17, Pl. II. Some periderm 
occurs on the edge of the scale. A broad ridge, a, projects from the inner (upper) face 
of the scale, separated by a narrow sinus on each side from the rest of the cone-scale ; 
this ridge we believe to be a ligular outgrowth, the relation between the ridge and the 
rest of the scale being very similar to that in a recent Araucarian sporophyll. The 
three cavities below the ridge @ bear a close resemblance to the large resin-canals which 
occur in a similar position in a transverse section of a cone-scale of Araucaria Cookie. 
Close to the cone-scale V. there are some obscure fragments of tissue (x, text-fig. 
2, A) with which are associated a few spores of triangular form and with smooth walls, 
also some tubular hypha-like cells; these spores and tubes may be pollen-grains and 
tubes, or they may be portions of a fungus. 
Text-fig. 4, B, and fig. 10, Pl. I., represent an almost complete cone-scale in radial 
longitudinal section, 1‘°7 cm. long. Above the broken apex the upper surface forms a 
rounded prominence and then dips downwards to the attachment of the ligule at J, 
beyond which is an oval depression, s, which was most probably occupied by a seed. 
This portion of the scale is more clearly seen in fig. 11. The upper strip of tissue at 
a (fig. 11, and text-fig. 4, B) is a detached portion of the ligule, and at Se (text-fig. 
4, B) is the lower edge of another cone-scale. A vascular strand (v, fig. 10) extends 
through the greater part of the scale, the protoxylem being on the upper margin. 
Indications of bordered pits are visible on the walls of some of the lower tracheides ; 
these occur in a single row, and though close together are not actually in contact. In 
one place there is an indication of contact of the pits. ‘The epidermis has thick outer 
walls, and idioblasts are abundant in the ground-tissue (jf, fig. 16). A band of periderm 
(a, text-fig. 4, B, and fig. 10) encloses an oval area occupied by crushed and disorganised 
tissue. It is this area which is shown as a space bounded by periderm in the transverse 
section reproduced in fig. 9. The hypodermal tissue next the lower surface is char- 
acterised by a well-marked palisade-like arrangement of the cells (fig. 16). 
Forma 6. (Text-fig. 4, C; Pl. IL figs. 17-21.) 
The fourth form of cone, which agrees closely with the more compact type (text-fig. 
2, A, B), is represented by an oblique longitudinal section (4°5 x 3°5 em.) in Dr 
Krpston’s collection, cut from one of Miturr’s specimens. The secondary xylem, a, 
fig. 19, enclosing a small-celled pith, is not sufficiently well preserved to afford any 
information as to the nature of the pits on the tracheal walls. ‘The cone-scales exhibit 
several of the features already described ; thick-walled idioblasts are abundant in the 
imperfectly preserved ground-tissue, the lower epidermis is succeeded by palisade- 
like cells (as in fig. 16), and a large space occurs in the proximal half of each cone-seale. 
Cone-scale A, fig. 19, enlarged in fig. 21, is cut in an approximately median radial 
plane; a vascular strand, v, occurs between a large lower space and a smaller upper 
space ; the ligular outgrowth is seen at 7. No seeds are preserved, but what is believed 
