Tlie Voyage ofHM, S. "ChalLen^er ' 



Opbitolites PI IV 



/. 



St 8 



sfc 



> r'lit i^'^^mr^M^ 



Geo West Jr litk. slS. iLat 



WestNewiiLajiAC? uup. 



FIG^ 1-5 ORBITOLITES MARGINALIS, FIG? 6-10. O. DUPLEX 



