465 
For a short time past Orthophragmina of Nias') are known, 
whilst in the eastern part of our archipelago they were found in 
West Celebes*), West Timor, the new island near Ut, Great Kei, 
Kilwair, Tofuré, in New-Guinea eastward of the Etna Bay, Rend- 
juwa ®) and in West Buru *). 
With the great number of very often incompletely described species 
of Orthophragmina that are known from the Dutch East-Indies, it 
will often be difficult to decide with which species a special form 
must be classed; fortunately this difficulty did not present itself with 
regard to the Sumba material, as the Orthophragmina in question 
belong to 2 wellknown species, O. javana Verb. and O. dispansa 
Sow., as will appear from the description. 
Orthophragmina javana VERBEEK. 
Syn. O. papyracea Boubée, in von Fritsch 1879? | 
O. papyracea Boubée, var. javana in Verbeek. T. A. G. 1. 
O. papyracea Boubée, var. javana in Verbeek 1892 and 1896. 
QO. dispansa Sow. in Martin 1881 (partim). 
O. javana Verbeek in Douvillé 1905. 
O. javana Verbeek in Douvillé 1912. 
Discocyclina discus Riitimeyer in Verbeek 1908. p. 304. 
From the finding-place n°. 105 I received 5 isolated Orthophragmina, 
which, though they are very different in size (diam. 6, 12, 14, 24 
and 27 mm.), cannot be separated from one another and must be 
classed with one species. 
The pretty well conserved fossils have the form of regular lenses, 
showing either no central chamber at all or one which is but little 
pronounced in its youth; most of them are symmetrically thickened 
towards the centrum; the specimen of 27 mm. diameter had a 
thickness of 6 mm. The surface of the fossils is somewhat disin- 
tegrated, so that the fine-granular, dense, and very symmetrical 
granulation cannot very well be seen. Three horizontal sections 
were made, from which it appeared that the larger specimens of 
24 and 27 mm. diameter were microspheric and the one of 12 mm. 
1) H. Douvirré, Samml. des Geol. Reichsmuseums Leiden. (1). 8. 1904—12. 
p.p. 253—278. 
2) H. Douvitté. le. 1905. 
R. D. M. Verpeex. Molukkenverslag. Jaarb. van het Minw. Wetensch. Ged. 
XXXVII. 1908, p.p. 54, 80, 81. 
3) R. D. M. Verseek. le. 1908. p.p. 398, 625, 613, 616, 255, 474, 754 en 304. 
4) J. Wanner. Centralbl. fiir Mineralogie, Geologie und Paläontologie. 1910, 
p. 140. 
