032 Prof. G. Lindstrém—On Ascoceras of Barrande. 
The specimens now under consideration do not affect the question 
decidedly either way. The fact that all the forms mentioned above 
occur in the European Eocene would appear to be an argument in 
favour of the Eocene age of the rock. The Hocene facies of the 
Foraminiferal fauna may, however, be due to that eastward migra- 
tion which appears to have taken place, and which may account 
for the character of the mollusca in strata that would otherwise be 
looked upon as Miocene. 
Amphistegina and Heterostegina are rather Miocene than Eocene 
genera, and in an Hocene limestone of this kind one would expect to 
find Nummulites associated with the Orbitoides. 
Dr. K. von Fritsch’s Patellina trochus from Borneo! very probably 
comes from beds below the limestone, and in its form and size it seems 
identical with the small pointed forms occurring in the Cretaceous 
of Navarre. The large fossil Patelling have been regarded as charac- 
teristic of the Cretaceous and Kocene, but they undoubtedly range 
above the Eocene, and specimens in the Science Schools Collection 
from the Miocene of Jamaica occur associated with Orbitoides, 
Amphistegina, and Heterostegina. 
On the whole, therefore, though the species of Orbitoides are 
among those which characterize the Hocene rocks in Europe, there 
is good reason for defending the suggestion that the Orbitoidal Lime- 
stone of Borneo may be of a later date. 
The work on these specimens has been done in the Geological 
Laboratory of the Normal School of Science and Royal School of 
Mines, and I have to thank Professor Judd, F.R.8., for the facilities 
afforded me in the preparation of sections, ete. 
EXPLANATION OF PLATE XIV. 
Figures of Orbitoidal Limestone of North Borneo. 
Fig. 1. Stylophora, sp. X 20. 
Fig. 2. Section of the Limestone of the Batu Gading, showing IiZiola, 
Nodcsaria, Textularia, Amphistegina, Heterostegina, and Orbi- 
toides applanata, Gtimbel x 12. 
Fig. 3. O. (Discocyclina) applanata, Gbmbel. 
As seen in the water-polished surface of rock. 
a. 
6. In vertical section x 2. 
Oh, 99 > x 100. 
ai. is a9 xy) Ze 
Fig. 4 a. O. (Discocyclina) ephippium, Sow. sp. 
b. Insection x 10. 
Fig. 5. O. (Discocyclina) papyracea, Boubée, sp. 
Fig. 6. O. (Discocyclina) dispansa, Sow. sp. 
Fig. 7. O. ( Asterocyclina), stellata, Gumbel. 
IJ.—On tHe Genus Ascoorr4és, BARRANDE. 
By Professor G. Linpsrrom, of Stockholm. 
TIE uppermost limestone stratum of Gotland, which occupies 
two-thirds of the surface of this island, and is homotaxial 
with the English Upper Ludlow, contains such numerous fragments 
of Cephalopoda, that it has been called the Cephalopodan Lime- 
stone. Judging from the collection in the Paleontological Depart- 
1 Op, cit. p. 145. 
