292 Frederick CJicvpman : 



cation of the Miocene form, since both types occur in beds of the 

 same age, characterised by the same species of Lepidocyclines, 

 that is to say, the Miocene beds in the E. Indies contain Lepi- 

 docyclina marginata and Miogypsina,^ whilst at Batesford the 

 L. marginata is accompanied by Gypsina howchini. The Mio- 

 yypsiuae of the Miocene and the related Gypsina vesicularis 

 var. discus are both typical of coral seas. 



Common in the Lepidocyrlina limestone of both -Quarries. 



Polytrema minutum, sp. nov. PI. II,, Figs. 3a, h. 



Dtscription. — Test very small ; conical, with a spreading 

 base. Body of test slender, and with minute branches. Cham- 

 bedets minute. 



Width of base, .93 mm.; height, .517 mm. 



Observations. — This is an exceeding small and neat modifica- 

 tion of P. miniaceum, and may be dstinguished from that form 

 by the almost perfectly circular base, short habit and slender 

 branches. 



Two specimens from the foraminiferal rock of the Filter 

 Quarries. 



Family Xlmmulinidae. 



Nonionina unibilicatula, Montagu sp. 



Nautilus umbilicatulus, Montagu, 1803, Test. Brit,, p. 191 ; 

 Suppl., p. 78, pi. XVIII., Fig. 1. 



Previously recorded from the Balcombian of Muddy Creek by 

 Howchin. 



One specimen in the foraminiferal rock of the Filter Quarries. 



Xonionina boueana, d'Orbigny. 



Xoiiioiiind boutana, d'Orbigny, 1846. Foram. Foss. Vienne, p. 

 108, pi. v., Figs. 11, 12. 



The nearest locality where this species now lives appears to 

 be the West Coast of Patagonia. It is a common Upper Oligo- 

 cene and Miocene form. The species is new to the Australian 

 Tertiary fauna. 



A typical specimen from the Filter Quarries. 



1 Miotxviwiiia, accoidin^'- to Vnilcieiihorj,', has not yet been met with in India. 



