8o 
T. G. HALLE, 
(Schwed. Südpolar Exp. 
these are extended vertically, with the longer diagonal parallel to the axis; in other 
specimens they are of equal length and breadth or broader than long (pi. 9, figs. 
15, 16). In the two figures last mentioned there cannot be seen any impressions of 
the free conical portions of the leaves; but on a careful examination of the speci- 
mens themselves such are seen to be present. The difference in length and breadth 
of the areoles is probably of no great importance, since there are numerous con- 
necting forms. In some specimens which agree in other respects with those men- 
tioned, the areoles show a more or less deeply marked median longitudinal line. 
The specimens shown in pi. 8, fig. 42, probably belong to the same species as 
the others. They are a little larger but they have a similar kind of areoles, with 
hollow-like impressions near their upper ends. The enlarged figure, 42 a, which does 
not give a very good idea of the aspect of the specimen, represents a portion of 
the longest specimen in fig. 42. 
It would serve no useful purpose to attempt a specific determination of such 
fragments as these. Although some of the specimens are fairly well preserved, they 
do not present any sufficiently distinctive characters; and it is probable that the 
smallest twigs had very much the same aspect in several of the numerous species 
described of Brachyphyllum. 
r Genus Sphenolepiditim Heer. 
Sphenolepidium? oregonense Font. 
PI. 9, figs. 5 b, 9— II, 13. 
Sphenolepidium oregonense^ Fontaine in; Ward 1905, p. 133; pi. 36, figs. 3 — 8. 
The collection contains several specimens of slender twigs of the Sphenolepidiuni- 
type which are undistinguishable from Fontaine’s A. oregonense. 
The sterile specimens, some of which are shown in figs, and 9 — ii, pi. 9, 
are very slender and only very rarely branched. The leaves are very closely ad- 
pressed to the axis. They appear to be somewhat keeled or folded, and are falcate, 
with the tips strongly incurved. The apex is obtuse. It is not possible to decide 
with certainty whether there is a midrib or not. Though there are numerous speci- 
mens of this plant, no thicker branches are represented than those shown in pi. 9. 
The habit is very characteristic on account of the rareness of branching and the 
close application of the leaves. 
The little fragment shown in pi. 9, fig. 13, belongs almost certainly to the same 
species. Its basal part agrees in habit with the smallest branches of the kind now 
described; and a close examination shows that the resemblance extends to the leaves. 
