IP OS t c Is t a 267 



one specimen the sorus is divided by a sterile 

 portion of the lamina into two, and in several 

 others it is almost divided. 



In contrast with the other kelps found in 

 the wash not a specimen of the variety out of 

 about forty seen, had a holdfast. Nearly all 

 were cut off below the blade sharply as though 

 bitten off by some kelp eating fish. All the 

 other kelps including even Lessioniopsls, which 

 clings so securely that it will support a 

 a man's weight, and Dictyoneuron, which grows 

 out so far in deep water that its habitat at 

 Port Renfrew has never been discovered, are 

 torn up "by the roots" and washed in whole 

 as often as in fragments. This absence of 

 holdfasts is the more significant because of 

 their weakness and the ease with which they 

 would be torn loose. 



The striking difference in the length of the 

 laminae in shallow water specimens and those 

 washed up from inaccessible depths shows 

 more plainly the nice adjustment of strength 

 of tissue and clinging power than any other 

 kelp of the locality. Where wave action is 



