EE VISED LIST OF MAEINE ALG^B. 103 



Cohort IV.— CUTLEBHnLE. 

 Order I. — Cutleeiace^e. 

 Cutleria multifida, Grev. 



Hilbre I. !, Puffin I. !, I. of Man. 

 Cohort V.— FUCINiE. 

 Order I. — Fucace^e. 

 Fucus ceranoides, Linn. 



Hilbre I.!, Anglesea. 

 F. vesiculosus, Linn. 



All rocky parts of the coast ! 

 F. serratus, Linn. 



All rocky parts of the coast ! 

 F. platycarpus, Thur. 



Puffin I. !, Hilbre I. !, Point of Ayr. 

 Ascophyllum nodosum, Le Jol. 



All rocky parts of the coast ! 

 Himanthalia lorea, Lyngb. 



Anglesea, I. of Man ! and cast up on the beach 



I at Southport. 



Halidrys siliquosa, Lyngb. 

 Puffin I. !, Anglesea!, I. of Man ! 

 Peluetia canaliculata, Decne. et Thur. 

 Hilbre I. !, Puffin I. ., Anglesea! I. of Man ! 

 I have gathered this species in situations considerably 

 above high water mark. The plants were in a quite 

 healthy condition, although a dash of spray or an occa- 

 sional wave at high tide must have furnished them with 

 their entire supply of salt water for twelve hours at a time. 

 I have no doubt that the canaliculate nature of the frond 

 enables them to retain what little water they obtain on 

 these occasions to serve them until the recurrence of high 

 tide. It is worth noting that Enteromorpha canaliculata 

 is also a characteristically high water species. 





