( 1125 ) 
incorrect, and determined it as their O. 1A. d6,42mm. The disk 
is in the centrum gradually thickened, and on both sides covered 
with warts (on Brapy’s representation I count about 40 of these). 
Afterwards as a new sort of Christmas Island OQ. neodispansa has 
been described by Jones and Cnapmam'’), the diagnosis of which 
O. dispansa Brapy and O. 1A Verperk and Fennema (d 5, h 1'/, mm.) 
This QO. neodispansa consequently seems to occur in Christmas Island », 
Nias '), Padangsche Bovenlanden *) and Java. 
At all events O. 2C and O.2D Verperk and Frnnema ') differ 
from this O. neodispansa, the former of which is megalospheric, the 
latter microspheric, according to the representation the scale is 
quite smooth and provided with a central tubercle, d 5—6 h 2 mm. 
Java. 
At last the megalospherie form of O Vournoueri Lam. et Dov vir 
(¢4-—5 mm.) which has only a few warts in the centrum, belongs 
to these small forms. *). 
+. Large Forms. A great many large Orbitoides from the Indian 
Archipelago have been deseribed, which, as they are not yet com- 
pletely known, can be determined either with great difficulty or not 
at all. To these belong O. gigantea Martin'), O. Cartert Martin ®), 
QO. 3 EH and O. 3 F VERBEEK and FENNEMA'j, all of Java. Of the 
latter two, the former is again micro- the other megalospheric. Most 
likely a few more are hidden among these two sorts, as for their 
horizontal diameter is given 4'/,—70 mm., which is certainly a too 
great variability. A common property is the spatulate form of the 
median chambers, on horizontal section and their large dimensions 
(max. 0.250 mm. radial with 0.2000 mm. tangential), which is much 
more than with the evidently allied O. Mantelli. 
Another gigantic incompletely known Orbitoid which consequently 
did not receive a name, is found in Great-Kei (d 70 mm.)'). Two 
large, incompletely known forms are found in Timor’), one of these 
has median chambers as O. Mantelli Mort *). 
A pretty large Orbitoid of Christmas Island O.  imsudlue-natalis 
was first, very incompletely, and only on account of the vertical 
1) Vide previous page. 
2) K. Martin. Die Tertiairschichien auf Java 1880. 
3) K. Martin, Samml. des Geol. Reichsmuseums, Leiden, 1, p. 8—64, 1881. 
