112 N'otes on Marine Algoe. By E. A. L. Batters. 



sitical on the smaller algse, &c., between tide marks all along the 

 coast. 



21. Oallithamnion plumula, {Lyngl.) — Very rare. Cast up 

 from deep water behind the pier usually in single specimens. 

 This and Bonnemaisonia asparagoides are two of the species Mrs 

 Gatty says (vide " British Sea-weeds" Introduction p. xvi.) are 

 quite unknown on the north-east coast but of course this is a 

 mistake. Mr E. M. Holmes, F.L.S., has kindly examined my 

 specimens of these species, so that there can be no doubt of the 

 correctness with which they are named. 



22. Callithamnion floredd-ltjm, {Ag.) — Not uncommon all 

 along the coast from Berwick to Burnmouth. This species forms 

 little, purple, cushion-like patches on the rocks between tide 

 marks. 



23. Petssonella Dubyi, [Crouan.) — Parasitical on the stems of 

 Laminaria digitata forming thin, purple stains, often of consider- 

 able extent, on its stems. Not uncommon. 



24. Bryopsis plumosa, {Ag.) — Berwick specimens of this alga 

 are very small, never more than an inch long often much less. 

 It is to be found in the pools near the " Narrow Lane " but is 

 very rare. 



25. Entesomoepha cornucopia, {HooTc.) — Parasitical on 

 CoraUma officinalis between tide marks. Pare. 



26. Enteeomoepha eeecta, {Hook.) — This very pretty species 

 does not appear to come nearer to Berwick than Holy Island ; it 

 is to be found, though rarely, at the latter place in shallow sandy 

 pools, and is plentiful at particular spots. In the water it looks 

 more like a Cladophora or Conferva than an Enteromorpha. 



27. Enteeomoepha eamtjlosa, {Hoolc.) — Not uncommon near 

 Berwick and very plentiful a little to the north of the Needle-eye. 



28. Enteeomoepha PEECTJESA, {Hook.) — Not uncommon. Often 

 mixed with other algae. Found at the Coves and elsewhere. 



29. Cladophora refracta, (ZMfe.)— Occasionally found at the 

 Coves. 



30. Cladophora lanosa, (^wfe.)— Parasitical on Polyides 

 rotundus. My specimens of this species are very small and poor 

 compared with specimens gathered in the south of England. In 

 a pool not very far from Dodds' Well there is a considerable 

 quantity of it, elsewhere near Berwick it is very rare. 



31. Cladophora arcta, {Kutz.) — Not uncommon in Berwick 



