214 



Mr John Eattray on some 



Epiphytes. Host Plants, 



XitopliyUumpiiiictatum(<Stoc^7i.), \ Desmarestia aculeata (L.), 

 Harv. Lamour. (drift from deep 



water ; several cases of this 

 association have heen ob- 

 served). 

 Fucus vesiculosus, L. 

 Desmarestia aculeata (L.), La- 

 , mour. (10 fms.). 

 Ehodymenia palmata (L.), Grev. Cladophora rupestris, Kiltz. 



Ptilota elegans, Bonnem. 

 Polysiphonia fibrillosa, /. Ag. 



Plocaiuium coccineum (Huds.), 



Lyngh. 

 Porphyra laciniata {LigMf.), Ag. 



Do. 

 Iihizocloiiium ripaiium [Itotk.), 



Harv. 

 Ulva linza, L. 



Do. 



Do. 

 Enteromorpha corapressa, Grev. 

 Do. 



Cladophora rupestris, Kiitz. 

 Melobesia sp.? 



Ptilota plumosa (L.), Ag. (6 fms. ). 



Desmarestia aculeata (L), 

 Lamour. (drift from deep 

 water). 



Ceramium ruhrum (Huds.), Ag. 



Cladophora rupestris, Kiitz. 



Polysiphonia fibrillosa, J. Ag. 



Do. nigrescens {Dillw.), 



Grev. 

 Cladophora rupestris, Kiitz. 

 Polysiphonia fibrillosa, /. Ag. 

 Ceramium Deslongchampsii 



(Huds.), Ag. 

 Chondrus crispus (L.), Stackh. 

 Polyides rotundus, Grev. 



It may be useful to supplement this list by annexing a 

 number of cases of association of a similar kind whicii 

 Professor Magnus"''' of Berlin lias recently noted during a 

 cruise on the east coast of Britain, across the North Sea, 

 and along the opposite continental shores. These were as 

 follows — 



Lighthouse Bylk, W. f N,, 8| fms., " Harte-sandige 

 Grund," 21st July. 



" Mit dem Schleppnetze kameu herauf sehr viel Cystodonium 

 jpurpurascens, Ceramium ruhrum, G. decurrens, C. diaphanum, 

 haufig auf andem algen, namentlich Polysiphonia violacea sitzend." 



Between Sprogoe and Corsoer, '22-32 fms., stony ground, 

 22nd July. 



Furcellaria fastigiata (Huds), Lamour., " auf welcher Poly- 



* Dieiotanischen Ergebuissen der Nordseefahrt, vom.521 Juli bis Sept. 9, 

 1872. Berlin, 1874. 



