64 Ellen Marion Delf 



evidcLced by greater numbers of Algae as well as by the greater 

 variety of forms. Further information must be obtained, how- 

 ever, before any more definite conclusions can be reached, on this 

 point. 



In conclusion it may be well to mention some of the possible 

 economic uses of seaweeds. It is well known that the larger brown 

 Algae may be used as a source of iodine and also in some cases 

 of potash. The fronds and stipes of Ecklonia would be well 

 worth examining from this point of view. Before however any kelp 

 industry on a large scale should arise, it would be well to re- 

 member that at present we know but little of the lives of the fishes 

 of these seas, and any considerable interference with the algal 

 flora would probably affect the supply of certain fish sooner or 

 later. Many and probably all seaweeds form good manure for 

 soil, either burnt for their ash or simpV dug in as green manure. 

 If any one is inclined to utilise the cast up seaweeds for this pur- 

 pose they ought to receive facilities and encouragement from the 

 municipality, for many are the problems both for the scientist and 

 for the practical man in the study of seaweeds and the attempt to 

 utilise them. 



I have to thank Prof. Thoday of Cape Town University for 

 the photograph showing the habit of Ecl^lonia buccinalis, and Mrs. 

 Thoday for the original (drawn from life) of Fig. 1. 



