THE 



ORGANIZATION OF TRILOBITES, 



DEDUCED FROM THEIR LIVING AFFINITIES; 



^pstcmatic l\e\)iclo of tijc ^ptcttö l)tt|)crto ticöcriljcti. 



HERMANN BURMEISTER, M.D. PH.D. 



OEDINARY PBOFESSOR OF ZOOLOGY, AND DIKECTOK OF THE ZOOLOGICAL MUSEUII IN THE UNITED IIUEDKICIIS UNIVEHSITY 



OF HALLE-WITTE>BERG ; COllRESPONUING MEMBER OF TttE ROY'AL ACADEMY OP TURIN ; MEMBER OF TUE IMPERIAL 



ACADEMY NATUR.E CURIOSORUM ; OP THE ROYAL RUSSIAN SOCIETY OP NATURALISTS OF MOSCOW ; OF TUE 



PHYSICO-MEDICAL SOCIETY OF ERLANGEN ; OF THE NATURAL HISTORY SOCIETIES OF BERLIN, HALLE, 



ALTENBURG, HAMBURGH, AND THE HARTZ ; OF THE ENTOMOLOGICAL SOCIETIES OF LONDON, 



PARIS, STETTIN, PENNSYLVANIA, ETC. ETC. 



EDITED FROM THE GERMAN, 



PROFESSOR BELL, F.R.S. 



PROFESSOR E. FORBES, F.R.S. 



LONDON : 



PRINTED FOR THE RAY SOCIETY. 



UDCCCXLTI. 



