218 Mr John Rattray on some 



fastigiata (Huds.), Lamour., Polysiphonia nigrescens (Dillw.), 

 Grev., and Callithamnion Daviesii, Lj-ngb.; while Fucus vesiculosus, 

 L., carried Polysiphonia nigrescens (Dillw.), G-rev., Polysiphonia 

 violacea, J. Ag., Rivnlaria hemisplierica, Aresch., and Edocarpus 

 siliculosus, Kiitz. 



In his Alqoid Regions in tlie Eastern Part of the Skager 

 Rack, T. E. Kjellman* has noted the following instances of 

 epiphytism in the TUopteridan Formation (5 to 1 fathoms) of his 

 Sublittoral Eegion, of which he regards Phlceospora suhaHiculata. 

 Aresch., as the typical plant : — 



Melohesia farinosa (^.) Lamour., on Zostera marina (spar- 

 ingly) ; Poli/sipJionia byssoides (Good, et Woodw.), 

 Grev., on Furcellaria fastigiata (Huds.), Lamour. (spar- 

 ingly); Callithamnion pluinula (Ell.), Thur., on Zostera 

 marina (all the j'ear). 

 Again, in his Punctaria Formation (6 to 10 fathoms), of which 

 Panctaria tenuissima, Grev., and Chorda rainuta, Kjellm., are the 

 types, Gallothrix confervicola (Dillw.), Ag., on Geramium ruhrum 

 (Huds.), Ag. (sparingly); while in the Lithoderma Formation, 

 situated in the middle of the Littoral Eegion (10 to 15 fathoms), 

 and of which Lithoderma fatiscens, Aresch., L. polymorphuni, and 

 Phyllophora Brodicei (Turn.), J. Ag., are the typical plants, Sper- 

 mothamnion Turneri (]\Iertens), Aresch., has been found on 

 Furcellaria fastigiata (Huds.), Lamour. 



In the case of various seaweeds, collected in more distant 

 regions by Professor Moseley during the cruise of H.M.S. 

 " Challenger," Professor Dickie f lias noted a few siiuikr 

 cases of interesting associations. Thus Ectocarpus ger- 

 minatus, H. f. et Harv., was collected plentifully on Des- 

 marestia (localities — Cape Horn, Falkland Islands) ; 

 Conferva and Sphoerozyga, wLicli were too imperfectly pre- 

 served for closer determination, on Ballia calUtriclia^ Ag., 

 and Melobesia verucata also on Ballia (localities — Atlantic, 

 Mediterranean, Auckland, New Zealand, Tasmania). 



]\lany other cases of interest have been observed by 

 Harvey, I Hauck§ and other algologists. 



Tlie instances which I have noted above were observed 

 in connection with specimens procured between tide marks, 

 except in a few cases which have already been notified ; 

 those, on the other hand, recorded by Magnus and Kjell- 



* Bihang Till K. Scciiska Vet. Akad. Hand.Jingar, Bd. v. No. 6. 



t Jour iml Linn. Soc, vol. xv., £ot., pp. 43-45. 



t Harvey, Phycologia Britannica. 



§ Hauck, Meeresalgen DeiUschlands und OesUrreicJis, Leipzig, 1885. 



