Proceedings of the American Academy of Arts and Sciences. 



Vol. 51. No. 11.— April, 1916. 



CONTRIBUTIONS FROM THE ZOOLOGICAL LABORATORY 



OF THE MUSEUM OF COMPARATIVE ZOOLOGY 



AT HARVARD COLLEGE.— No. 269. 



ON THE LIFE-HISTORY OF CERATOMYXA ACADIENSIS, 



A NEW SPECIES OF MYXOSPORWIA FROM THE 



EASTERN COAST OF CANADA. 



By James W. Mayor. 



With Three Plates, and Three Figures in Text. 



