Marine Algce of Berivick-on- Tweed. 240 



Enteromorpha compressa (Linn.) Grev. 



Alg. Brit., p. 180. — Ulva compressa, Linn., Spec. Plant, n., 

 p. 1163. 



Descr. Enteromorpha compressa, Harv., Phyc. Brit. 

 Fig. „ ,, Harv., I.e. pi. 335. 



Exsicc. „ „ Wyatt, Alg. Danmon., no. 165. 



Syn. Ulva Enteromorpha, var. compressa, Le JoL, Liste Alg. Mar. 

 Cherb., p. 44 ; Farlow, Mar. Alg. New Eng., p. 43. 

 Enteromorpha compressa, J. Ag., Till. Alg. Syst. VI., p. 137 ; Ktz., 



Tab. Phyc. VI., t. 38; Havel-, Meeresalg., p. 428. 

 Enteromorpha complanata, Ktz., Tab. Phyc. VI., t. 39. 

 Ulva compressa, Johnston, El. Per. ir., p. 249. 

 Hab. On rocks between tide-marks ; a*lso on woodwork. Very common 

 everywhere along the coast. All the year. 



In this species the breadth of the frond varies greatly 

 according to the situation in which the plant grows. It is 

 always easy, however, to distinguish the species by its simple 

 branches, which taper to the base and are broader and obtuse 

 at the apex. This and the other species of Enteromorpha which 

 grow in the Tweed, are known to the fishermen bv the name of 

 "slake." 



Enteromorpha clathrata (Roth.) Grev. 



Alg. Brit., p. 181. — Conferva clathrata, Roth, Cat. Bot. in., 

 p. 175. 



Descr. Enteromorpha clathrata. Harv., Phyc. Brit. 

 Fig. „ „ Harv., I.e. pi. 340. 



Exsicc. „ ,, Wyatt, Alg. Danmon., no. 34 ; Wittr. 



et Nordst., Alg. Exsic, nos. 130 et 324. 

 Syn. Ulva clathrata, var. Eothiana, Le JoL, Liste., p. 50. 



Enteromorpha clathrata, J. Ag., Till. Alg. Syst. vi., p. 153 ; 



Hnucl; Meeresalg., p. 429 ; Ktz., Tab. Phyc. VI., t. 33., fig. 1. 



f. prostrata. Le Jol., Liste, p. 50 (sub Ulva.) 



Hab. On mncl-covered rocks between tide-marks. Pare. Jnne — Nor. 

 Penham Flats. 



The variety prostata is the only form of this species which I 

 have met with on this coast. As it occurs at Fenham Flats the 

 plant forms prostrate, woolly strata, often of considerable extent, 

 over the surface of the mud or muddy sand between tide-marks. 

 The fronds are repeatedly branched, the branches tapering to 

 the apex. 



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