REVISED LIST OF MARINE ALG^l. 119 



Aglaozonia parvula, (Grev.) Zanard. " General" (Marrat) ! 

 The "general" occurrence of the species (which 

 is A. reptans, Kiitz.) is, I fear, not correct. Even 

 its local occurrence is doubtful and requires con- 

 firmation. 



Sargassum linifolium, (Turn.) Ag\, recorded in my last 

 report, is of course an ocean waif, and has no place 

 amongst British Algee. 



AscophyUum nodosum, var. scorpioides, Hauck., was re- 

 corded in my last Eeport. I withdraw it as my 

 plant turned out on further examination to be only 

 a dwarf specimen of the type. 



Cystoseira, Ag. Four species of this genus, viz. : ericoides, 

 ffmiculaceus, fibrosa, and barbata, are recorded by 

 Garner and Marrat from I. of Man and Hilbre I. 

 It is certainly remarkable that these species should 

 be found growing with Odonthalia dentata at the 

 I. of Man, and I prefer to place them in this list of 

 " doubtfuls " until authentic specimens are forth- 

 coming. 



Dictyopteris polypodioides, (Desf.) Lamx. is recorded by 

 Garner from I. of Man. This must also be con- 

 firmed before it can be received as a known native 

 of our coast. 



Ehodophyce^:. 



Nemalion multifidwn, (Web. et Mohr.) J. Ag., recorded as 

 " general " by Marrat ! 



Callithamnion brodiai, Harv. I. of Man (Marrat) is 

 probably a mistake for C. hookeri. 



Callithamnion pluma (Dillw.) Ag. A mistaken identi- 

 fication of my own for Spermothamnion turneri, var. 

 repens. 



Griffithsia barbata, (Eng. Bot.) Ag. New Brighton ! 

 (Marrat). This is almost certainly a mistake. 



