508 
from the region where rises the Sg. Melawan, southern affluent of 
the Sg. Sekuran, about 35 k.m. north of Bontang. 
Also in Old-Mioeene Miogypsina-marl, to the south of the Bungalun- 
river; in J.ate-Miocene marl from Kari Orang and in Pliocene marls 
from Sungei Busu, southwest of Bontang. In all these finding-places 
Halimeda coincides with littoral Foraminifera and with Corals, which 
goes to show that the places where the Oligo-Miocene algae grew, 
were similar to those of the algae still living. 
There is no argument for classing the fossil Indian remainders 
as a new species. The isolated calcareous bodies (fig. 1) agree satis- 
factorily in size and outward form with those of H. Opuntia Lam. 
forma triloba, and also the internal structure (fig. 2) corresponds 
with the structure of this species, in that the central thallus-bundles 
branch off already at the base of the calearious bodies, and the 
branches run directly towards the extremities of the lobes, which 
are occasionally more or less distinct *). 
1) Cf. E. Askenasy. Algen der Gazelle-Exp. in die “Forschungsreise S. M. S. 
Gazelle” in den Jahren 1874—1876. IV. 1889, p. 11. 
