12 
Fig. 11. Trema argentea , portion of leaf, showing 
venation. 
Viewed by itself it would be scarcely iden- 
tifiable, but when placed side by side with a 
leaf of this species the correspondence of the 
venation pattern is striking. 
This is a tree commonly found in the south- 
ern Marianas, especially in second growth 
and pioneer situations, but more often on 
limestone than on volcanic soils. It is not 
known to be living on Pagan at the present 
time. 
Melanolepis multiglandulosa (Reinw.) Reich- 
enb. f. 
PC-86-2 
A fragmentary leaf impression showing the 
main veins. The palmate and net venation 
pattern checks very well with that of this 
species, which is common on Pagan as in the 
rest of the Marianas, extending to Indonesia. 
It grows in thickets and secondary scrub 
forest. 
PACIFIC SCIENCE, Vol. XII, January, 1958 
MELIACEAE 
Aglaia viariannensis Merr. 
PT-7-3 
Several imperfect impressions of leaflets, 
some showing pinnate venation. The veins 
are rather straight and strongly ascending. 
The shape of leaflets of this species varies 
from elliptic to obovate and that of the fossils 
shows corresponding variation as much as 
could be expected in the meager material 
available (Fig. 12^). 
This is one of the commonest species of 
small trees in thickets as well as forests 
throughout the Marianas, including Pagan. 
Related species are found elsewhere in Micro- 
nesia and westward. 
SAPINDACEAE 
Tristiropsis obtusangula Radik. 
PC-58-1 (a-e), PT-7-2, 5 
Impressions of leaflets, mostly imperfect, 
apparently somewhat folded along midribs, 
rather stiff, some of them showing main vena- 
tion of a pinnate character. Some of the more 
poorly preserved of these impressions may 
belong to Aglaia , but the oblique bases of 
most of them scarcely fit that genus (Fig. 13). 
Tristiropsis obtusangula is at present known 
only from Guam and Rota and grows usually 
but not always on limestone. 
TILIACEAE 
Elaeocarpus joga Merr. 
PT-7-4 
A practically perfect leaf impression, ob- 
ovate, showing a short petiole and some vena- 
tion (Fig. 12b). 
This species extends throughout the Mari- 
anas as far north as Pagan. In the southern 
Marianas it grows on limestone but in the 
north on lava flows. It is a large forest tree. 
Closely related species are found in other 
parts of Micronesia and the Philippines. 
