CLASSIFIED CONTENTS. 



PAGE 



PROTOZOA :- 



SPHAEROZOUM PUNCTATUM, A COLONIAL RADIOLARIAN . . . 73 



PORIFERA : 



SPONGES, AN INTRODUCTORY SKETCH ... ... 14 



CCELENTERATA :- 



THE LIFE-CYCLE OF OBELIA GENICULATA ... ... 58 



THE HYDROID STAGE OF OBELIA GENICULATA ... 77 



THE CORYNID^: ... ... ... ... .. 86 



ON SERTULARIA PUMILA ... ... ... .. 91 



THE PLUMULARHXE . . ... ... ... 103 



HALICLYSTUS OCTORADIATUS THE LAMP-POLYP ... 5 



THE PERMANENCE OF THE SCYPHISTOMA-STAGE OF 



AURELIA AURITA ... ... ... ... 101 



THE STRUCTURE OF ANEMONES ... ... ... 43 



TYPICAL ALCYONARIA ... ... ... ... 56 



ANNELIDA :- 



THE ANATOMY OF TOMOPTERIS ... ... ... 8 



ON POLYNOE PROPINQUA AS TYPICAL OF THE HlGHER 



ANNELIDS ... ... ... ... ... 62 



VARIATION IN THE OPERCULUM OF SERPULA ... 50 



BRYOZOA (POLYZOA) :- 



FAMILIAR BRITISH BRYOZOA ... ... ... 116 



ECHINODERMATA:- 



THR STALKED LARVA OF ANTEDON ... 77 



M374374 



