298 Frederick Chapmcni : 



D'Archiac's species stellata has the same outline, but the cham- 

 bers of the median plane are rectangular, and it is now referred 

 to the Eocene genus Orthophragmina. I have already recorded 

 L. martini, from the Miocene limestone of the West Coast of 

 Santo, New Hebrides. 



The test of the al)ove species is distinguished externally by 

 its roughly stellate form, with prominent ridges passing from 

 the central area into the peripheral processes ; the latter tend 

 to flatten out at the extremities. A luegasphere of this species 

 from Batesford measures .I72mm. in diameter. The test some- 

 times attains a diameter of 5mm. 



Moderately common in the basal limestones of both Quarries. 



OSTRACODA. 



Fam. Cypridae. 

 Pontocypris attenuata, Reuss. 



P. atienuata, Reuss, G. S. Brady, 1868, Ann. Mag. Nat. Hist., 

 ser. 4, vol. II., p. 179, pi. IV., Figs. 11-14. Id., 1880, 

 Rep. Chall. Zool., pt. III. p. 38, pi. XV., Figs. la-d. 



This species is now living in the Indian Ocean, around New 

 Guinea, and in the China Seas. 



A small but characteristic valve from the Filter Quarries. 



Bythocypris reniformis, G. S. Brady. 



B. reniformis, G. S. Brady, 1880, Rep. Chall. Zool., pt. III., p. 

 46, pi. v., Figs. la-l. 



This species, as a living form, has a wide distribution. 

 Amongst other localities it has been recorded off E. Moncoeur 

 Id., Bass Strait, 38-40 fathoms. 



A single carapace found in tlie limestone of tlie Filter Quarries. 



Bairdia amygdaloides, G. S. Brady. 



B. aniyydaloides, G. S. Brady, 1865, Trans. Zool. Soc. Lond., 

 vol. v., p. 364, pi. LVIL, Figs. 6a-r. Id., 1880, Rep. 

 Chall. Zool., pt. III., p. 54, pi. TX.. Figs. 5«-/' ; pi. X. 

 Figs. 'la-r. 



A distinguishing feature of this species is its evenly arched 

 carapace, as seen from al)ove. It is found living in Bass Strait, 



