
A LIST OF THE ALGH OF LAMLASH BAY, ARRAN. 63 
were towards the north channel, in seven to twelve fathoms. A 
number of species was met, more or less rare, including Dudresnaya 
coccinea, Bonnem., Scinaia furcellata, Bivona, Bonnemaisonia 
asparagoides, Ag., Lithothamnion coralloides, Crn., var. subsimples,, 
Batters, nov. var., Halicystis ovalis, Areschoug. This species was 
obtained moderately common adhering to Lithothamnion coralloides, 
Crn., var. subsimplex, Batters, at a depth of seven to eight fathoms. 
So far as I am aware, this Alga is new to Britain, with the 
exception of one or two specimens dredged in from eight to nine 
fathoms by Dr. Murray about two years ago in Kilbrannan 
Sound, in company with the late Professor Schmitz and Mr. George 
Murray of the British Museum. 
My thanks are due to Mr. E. A. L. Batters, LL.D., B.A., 
F.LS., &c, for his kind assistance. He has examined all 
doubtful species. 
SERIES CYANOPHYCEA. 
OrpDER RIVULARIACES. 
Calothrix, C. Ag. 
C. confervicola, C. Ag. 
Rivularia, J. Ag. 
R. atra, Roth. 
SERIES CHLOROPHYCE. 
OrpDER ULVACE. 
Enteromorpha, Link. 
E. clathrata, J. Ag. 
E. compressa, Grev. 
E. intestinalis, Link. 
Ulva, Linn. 
U. lactuca, Le Jol. (= /Jatissima, Phye. Brit.). 
OrpDER CLADOPHORACEZ. 
Urospora, Aresch. 
U. isogona, Batt. (=Conferva Youngana, Phyc. Brit.). 
Ulothrix, Kiitz. 
U. flacca, Thur. (= Lyngbya flacca, Phyc. Brit.). 
Cheetomorpha, Kiitz. 
C. melagonium, Kiitz. (=Conferva melagonium, Phyc. Brit.). 
C. wrea, Kiitz. (= Conferva crea, Phyc. Brit.). 
C. tortuosum, Kiitz. 
