ON THE 



STRUCTURE AND AFFINITIES 



OF THE 



TABULATE CORALS' 



PAL.^OZOIC PERIOD 



WITH CRITICAL DESCRH'TIONS OF 

 ILLUSTRATIVE SPECIES 



> BY 



H/^ALLEYNE ^ICH OLSON 



.ALT),, D.Sl,, I' K.S.K., K.L.S. 



rKoFE.ss.Ok OF NA'JTJKAL lli,^T<lLY IN 'ill!': 

 UNIVFIiMTV OF ST ANDREWS 



WILLIAM BLACKWOOD AND SONS 



EDINBURGH AND LONDON 



MDCCCLXXIX 



