Notes on Marine Algos. By E. A. L. Batters. 109 



pmascens). Again Callithamnion polyspermum is recorded in the 

 earlier volume (sub nom. C purpurascens, Fl. Berw. vol. ii., p. 

 240), but is not mentioned in tbe later. Johnston and Croall 

 however (Nature Printed British Sea Weeds, vol. ii, p. 175) give 

 this species as occurring at Berwick, on the authority of the pas- 

 sage in the '' Flora of Berwick." Almost the same may be said 

 of BMzoclonium riparium (Conferva riparia, Fl. Berw., vol. ii., p. 

 254), without doubt these species do occur at Berwick, and pro- 

 bably Dr. Johnston omitted them unintentionally from his list in 

 the '-'Natural History of the Eastern Borders." 



All the species mentioned in this latter list, with the exception 

 of Mesogloia vermicularis, a species I have never met with, and 

 which I believe has not been found for many years, are still to 

 be found in the vicinity of Berwick. Mrs Gatty's list needs no 

 comment ; all the algse there recorded are still to be met with 

 near Berwick. It is not usual, however, to reckon Rhipidophora 

 paradoxa amongst what are now usually called marine algse. 



The following is a list of the Algse which have been recently 

 found in the neighbourhood of Berwick-upon-Tweed, and which, 

 as they are not mentioned in either Dr. Johnston's or Mrs Gatty's 

 list, I believe to be previously unrecorded in the neighbour- 

 hood : — 



1. Laminaeia FLEXicAULis, {LeJoU.){L. digitatavar. stenophylla, 

 Harv.) — This species is not uncommon all along the coast from 

 Holy Island to Burnmouth. There can be no diflficulty in dis- 

 tinguishing this species from Laminaria digitata, Lamour., as its 

 smooth, almost black, and somewhat compressed stems, may 

 be known at a glance from the pale brown, corrugated, cylin- 

 drical stems of the latter species. As its name implies its stems 

 are much more flexible than those of Laminaria digitata, and 

 may often be tied in a knot, while the stems of the latter are 

 crisp and easily broken. 



2. LiTosiPHON pusiLLUs, {HttTv.) — This species is always par- 

 asitical on the stems of Chorda filum, sometimes entirely covering 

 them with its hair-like fronds. This plant is plentiful in a long, 

 shallow, sandy pool situated about half way between the pier 

 and the "Greenses." 



3. Myrionema steangttlans, (G'r^i?.)— Always parasitical on 

 Enteromorpha compressa and other green algse ; this species forms 

 dark stains on their fronds which look more like dirt than an 

 alga. Not uncommon. 



