The issue of the Phycological Memoirs is made for the -purpose of keeping 

 within the limits of one book the results of researches on Alg<e in the De- 

 partment of Botany, British Museum. 'The publication is not a Journal, and 

 is not meant to compete with the numerous excellent botanical magazines. 

 It is intended to issue Parts at about half-yearly intervals and in time to 

 complete a Volume containing about 50 plates. In addition to the promotion 

 of research, the authors of the Memoirs have the object of making better 

 known the treasures of the Museum, which they have received facilities to 

 investigate. 



CONTENTS OF PART I. 



I. ON SPLACHNIDIUM RUGOSUM, GREV., THE TYPE OF A 

 NEW ORDER OF ALG^E. By MARGARET O. MITCHELL, former 

 Bathurst Student, Newnham College, Cambridge, and FRANCES G. 

 WHITTING, former Student of Newnham College, Cambridge. 



II. ON A FOSSIL ALGA BELONGING TO THE GENUS CAU- 

 LERPA, FROM THE OOLITE. By THE EDITOR. 



III. ON THE STRUCTURE OF DIC1 YOSPH&RIA DECNE. By 

 THE EDITOR. 



IV. ON MALFORMATIONS OF ASCOPHYLLUM AND DESMA- 

 RESTIA. By ETHEL SAREL BARTON. 



V. ON CONCHOCELIS, A NEW GENUS OF PERFORATING ALG.E. 

 By E. A. L. BATTERS, B.A., LL.B., F.L.S. 



