97 
the British Marine Algae . 
RHODOPHYCEAE (continued). 
Pleonosporium Nag. 
P. Borreri, Nag. {Callithamnion Borreri, , Phyc. Brit.), 
i. 8. 9 ! 13. 
f. fasciculata, Holm, et Batt. {Call fascicula/um, Phyc. 
Brit.). 8! 
Tribe IV. — Callithamnieae. 
Rhodochorton Nag \ 
Rh. Rothii, Nag. ( Callithamnion Rothii , Phyc. Brit.). 
1-14. 
Rh. floridulum, Nag. ( Callithamnion flondulum , Phyc. 
Brit.). 1-14. 
Rh. intermedium, Kjellm. 4 ! 
Rh. mesocarpum, Kjellm. ( Callithamnion mesocarpum , 
Phyc. Brit.). 2. 
Rh. membranaceum, Magn. 4 ! 9 l 
Rh. sparsum, Kjellm. 2. 4 ! 9 ! 
Callitliamnion Lyngb. 
a. Eucallithamnion. 
C. tenuissimum, Kutz. 9 ! 
C. interruptum, C. Ag. 9 ! 
C. polyspermum, C. Ag. 1-14. 
C. roseum, Harv. 1-14, 
C. tripinnatum, C. Ag. 9. 1 1 . 
C. affine, Harv. 2. * 
/ 3 . Phlebolhamnion. 
C. Hookeri, C. Ag. 1-14. 
C. Brodiaei, Harv. 4 1 9 ! 
C. fruticulosum, J. Ag. 9 ! 
C. arbuscula, Lyngb. 1. 2. 3 ! 4 ! 5. n. 
C. tetragonum, C. Ag. 1. 2. 5. 6. 9! n. 14. 
f. brachiata, J. Ag. (C. brachiatum , Phyc. Brit.). 1. 2. 
5. 6. 9 ! 11. 14. 
C. tetricum, C. Ag. 9! n. 14. 
1 In the absence of cystocarpic fruit, which is unknown at present, the position 
of this genus is doubtful j it is placed here only for the sake of convenience. 
H 
