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Fig. ii Theodiscus, sp. ind. a. X 100. Chert. River Boengan.

„ 12 Staurosphcera, sp. ind. <z. X 100. Jasper. R. Kapoewas near the Tandjan. „ 13 Dietyastrum dcsecatum, Rüst. X 200. Jasper, near Mount Badau. „ 14 Amphibrachium cordiformis, sp. nov. X 20°- Jasper Mount Badau. „15 „ sp. ind. a. X 20°- Jasper. Mount Badau.

„ 16 Archicapsa Tandjani, sp. nov. X 200. Jasper. River Kapoewas near the Tandjan. „17 „ ficiformis, Parona. X 2°0- Jasper. Mount Badau.

„ 18 Sethoeapsa cometa, Pant. X 20°- Diabase tuff. River Badoengan. „ 19 „ sp. ind. a. X 2oo. Chert. Banjoe Leja.

„ 20 Theosyringium Badauensc, sp. nov. X 200. Jasper. Mount Badau. „ 21 Stichocapsa Boengani, sp. nov. X 2°°- Chert. River Boengan.

PLATE III.

Fig. 1 Dictyomitra superba. sp. nov. Jasper. River Kapoewas at Mimit Rapids. v 2 „ sp. ind. a. Jasper, at Loeboek Antoe. (Sarawak).

r 3 „ rudis, sp. nov. In siliceous shale at R. Pësaja near Roemali Singka.

„4 „ affinis, sp. nov. Jasper. River Kapoewas, near Tandjan.

„5 „ australis, Hinde. Jasper. R. Kapoewas, at Mimit Rapids.

„6 „ dilatata, sp. nov. Jasper. R. Kapoewas, near R. Tandjan.

„ 7, 8 „ Haeckelii, Pant. Jasper at Mimit Rapids and in Chert at Banjoe Leja. „9 „ crassa, sp. nov. Jasper. Mount Badau.

„10 „ Ehrcnbergi, Pant. var. nov. Chert. River Kapoewas, near Kërijau.

„ 11 Tricolocampe angularis, sp. nov. Jasper. R. Kapoewas, near the Tandjan. „ 12 Tricolocampe brevis, sp. nov. Jasper. Mount Badau.

„ 13 Dictyomitra sp. ind. c. Jasper. Mount Badau.

„14 „ sp. ind. d. Jasper. R. Kapoewas near mouth of the Tandjan.

„ 15 Cyrtocalpis tessellata, sp. nov. Jasper. Pëpanai Island, near Kërijau. „ 16 Dictyomitra scalaris, sp. nov. Jasper. R. Kapoewas, at Mimit Rapids. v 17 „ gr adata, sp. nov. Jasper. Mount Badau.

„ 18 Cyrtocalpis modesta, sp. nov. Jasper. Loeboek Antoe. (Sarawak). „ 19 Dictyomitra Ehrenbergi, Pant. sp. Jasper. Mount Badau.

„ 20 Lithostrobus Tandjani, sp. nov. Jasper. R. Kapoewas near the Tandjan. „ 21 Archicapsa ficiformis, Parona. Jasper. Mount Badau.

„22 „ similis, Parona. Jasper. „ „

„ 23 Sethoeapsa gracilis, sp. nov. Jasper. „ „

„ 24 Stichocapsa rotunda, sp. nov. Jasper. „ „

„ 25 Sethoeapsa elevata, sp. nov. Jasper. „ „

The figures are all enlarged to the same scale of 200 diameters.

PLATE IV.

Fig. 1 Stichocapsa, sp. ind. In Chert at River Boengan.

w 2 „ lens, sp. nov. Jasper. Mount Badau.

„ 3 Dictyo7iiitra Ehrenbergi, Pant. sp. Jasper. Mount Badau. „4 „ * consobri?ia, sp. nov. Diabase tuff. River Badoengan.

„5 „ truncata, sp. nov. „ „ „ „

„6 „ proxima, sp. nov. „ „ „ „

„ 7 Stichocapsa, sp. ind. #. „ „ „ „

„ 8 Dictyomitra obtusa, sp. nov. Jasper. Between R. Gërendjang and R. Pësaja. w 9 velata, sp. nov. Jasper. R. Kapoewas, mouth of the Tandjan.

„ 10 Stichocapsa pygmcea, sp. nov. Diabase tuff. River Badoengan.

„ 11 Tricolocapsa ping uis, var. Jasper. River Gërendjang. w 12 „ „ sp. nov. Jasper. Mount Badau.

„13 w pyriformis sp. nov. Chert. Banjoe Leja.

„ 14 Dictyomitra, sp. ind. Diabase tuff. River Badoengan.

n 15 w tennis, sp. nov. Marly limestone. Mouth of River Bënoewang.

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