1896.J 



MICROSCOPICAL JOURNAL. 



61 



Radiolaria; a new Genus from Barbados. 



HARRY J. SUTTON. 

 PHII^ADELPHIA, PA. 



Phacotriactis, n. gen. 



Definitio7i. — Phacodiscida with double medullary shell, 

 and with three radial spines on the margin of the disk, 

 placed in the equatorial plain. 



Phacotriactis triangula, 7i. sp. 



Disk triangular with smooth surface and smooth margin 

 about three times as broad as the outer medullary shell. 



Pores irregular, circular, 22 to 24 on the diameter of the 

 disk. Three radial spines of equal size and equidistant. 

 Spines conical, slightly furrowed and very short, being 



