Marine Algce of BerwioJc-oji-Tweed. 341 



NlTOPHYELUM REPTANS, CrOUttn, 



Ann. Sc. Nat., vol. xv., et Florule du Finistere, p. 153, pi. 

 21, gen. 140 bis. 

 Exsicc. Nitophyllum reptaus, Holme*, Alg. Brit. Bar. Exsicc, no. 16. 

 Syn. „ ., J. Ag., Epicr., p. 470. 



Hah. On the roots and stems of Laminaria hyperborea. Jan. — Oct. 



Bare. Berwick Bay, Burnmouth, Holy Island. 

 A small species with thin, veined, dichotomously divided fronds, 

 which creep over the roots and stems of Laminaria hgperborea, to 

 which they are attached by small rootlets. The upper surface 

 of the frond has a pitted appearance caused by the unattached 

 portions of the thallus being slightly more elevated than those 

 portions which overlie the rootlets. The fructification of this 

 species has not been observed in Britain. 



NlTOPHYLLUM PUNCTATUM (Stackh.) Grev. 



Alg. Brit., p. 79, t. 12. — Ulva punctata, Stackh., in Linn. 

 Trans, m., p. 236. 

 Descr. Nitophyllum punctatum, Harv., Phyc. Brit., pis. 202 and 203 ; 

 /. Ag., Spec. Alg. n., p. 659 ; Id., Epicr., p. 448. 



p. ocellata (Lamour.) 



J. Ag., I.e. — Fucus ocellatus, Lam., Ess., t. 32. 

 Descr. Nitophyllum punctatum, var. ocellatum, Harv., I.e. pi. 203. 

 Ersicc. ,, ocellatum, Wyatt, Alg. Danm., no. 15. 



Syn. „ „ Grew, Alg. Brit., p. 78. 



Aglaophyllum ocellatum, Mont., Ktz., Spec. Alg., p. 867. 

 Delesseria ocellata, Ag., Spec. Alg. i., p. 187 ; Ag., Syst., p. 252 ; 

 Grev., Crypt., t. 347. 

 Hob. Berwick Bay. Not uncommon. 



f. ulvoides (Turn.) J. Ag. 



I.e. — Fucus ulvoides, Turn., Hist., t. 80. 



Syn. Nitophyllum punctatum, Grev., I.e. 



Aglaophyllum punctatum, Mont., Ktz., Tab. Phyc. xvi., t. 36. 

 Hab. Berwick Bay. Not uncommon. 



p. ceispata, Harv. 



Descr. Nitophyllum punctatum, var. crispatum, Harv., Phyc. Brit., pi. 203. 



Hab. Cast ashore from deep-water during the summer months. Not 

 uncommon. Berwick Bay. 



With us, the varieties ocellatum and crispatum, which have 

 narrow irregularly dichotomous fronds more or less crisped at 

 the margins, are more frequently washed ashore than the 

 broader less divided variety ulvoides. 



