Tertiary Foraminifera from Borneo. 261 



Fi^:^. 8 is pliotograplicd from Brady's horizontal section cut 

 " near, but not at, the median pL-xne." It and fig. 10 show 

 Avcll the cylindrical shape of the chamberlcts and the perforate 

 chamber-walls. Fig. 6 shows the shape of the chambers of 

 tho median plane, and figs. 1 and 3 (from our Bornean 

 material) give vertical sections of the shell. 



Occurrence. Brady's specimens were collected by Dr. Ver- 

 beek from the marl-rock of Nias Island, west coast of Sumatra, 

 Our specimens are from the Gomanton-Hill limestone and 

 from pebbles taken from the bed of the River Malinara. 



6. Orbitoides (^Discocyclina) stellata (d'Archiac). 

 (PI. X. fig. 2.) 



Calcarina ? stellata, d'Arclnac, " Desc. Foss. Couches Nummulines en- 

 virons Bayonne," Mem. Soc. G^ol. France, 1846, ser. 2, vol. ii. pt. 1, 

 pi. vii. fig. 1, p. 199. 



Orbitoides {Asterocyclina) stellata, Giimbel, " Beitr. Foram. nordalpinon 

 Eocangebilde,'' Abhandl. k. BayeF. Akad. Wiss. 1868, Classe ii. 

 Band x. p. 713, pi. ii. fig. 11 o, pi. iv. figs. 4-7. 



To this species probably belongs the specimen figured in 

 PI. X. fig. 2. We have some hesitation in naming the 

 specimen at all, and do so only because of its association in 

 our slides with Nummulites Javanus and because we find that, 

 so far as our study of the Sumatran and Bornean material 

 goes, Dr. Verbeek's generalisation as to the non-occurrence of 

 Lepidocycline Orbitoides in association with Nummulites 

 appears to hold good. 



Occurrence. In a pebble from the bed of the River 

 Malinam. 



7. Other Orbitoides, 

 (PL X. figs. 3 & 4.) 



In our slides cut from pebbles of the River Malinam in 

 which Nummulites occur there are a considerable number of 

 sections (more or less vertical) of Orbitoides. They probably 

 belong to the subgenus DiscocycHna, and possibly include 

 0. {Jjiscocych'na) papyracea^ Boubee, and 0. (Discocyc/ina) 

 di'spansa, Sowerby. Ono of the vertical sections wc figure in 

 PI. X. fig. 3. 



In the material collected by Prof. Molcngraaff one section, 

 probably of a Discocycline, has been met with ; this we 

 figure in PI. X. fig. 4. 



Ann. (& il%. A^. Hist. Ser. 7. Vol. iii. lU 



