THE TYSON COLLECTION OE MARINE ALGAE 
115 
52. Polyzonia elegans, (Suin'.). 
Cape Morgan, Kei mouth on Gelidium and Polysiphonia, Ivowie. 
(Also Algoa Bay, Port Alfre.d, Port Natal. Barton (i).) 
58. Vidalia serrata (Suhr.). 
Kei mouth. (Also Port Natal. Barton (i).) 
65. Heterosiphonia dubia, (Suhr.). 
On various small algae, Table Bay, Three Anchor Bay. On one 
sheet is the note that II. dubia = Dasya dubia = //. crispa. 
H. pellucida, (Harv.). 
Cape Morgan. (Also Muizenberg. Barton(i).) One specimen. 
On the sheet is written “ The real plant of Harvey often con- 
founded with H. dubia ( D . dubia , Suhr.) Reinbold. ” 
67. Dasya scoparia, Harv. 
Submerged rocks, Kowie, Cape Morgan. (Also Green Point, Kei 
mouth, Port Natal. Barton (i).) 
14. Ceramiaceae. 
5. Griffithsia corallina, Lightf. Ag. 
Rock pools, low tide, Sea Point, Three Anchor Bay. (Also Table 
Bay. Barton(i).) We found this species at Glencairn bearing 
tetraspores, Oct. 1920. 
G. secunda, Harv. 
Sea Point. (Also Muizenberg. Barton.) 
Note. G. caespitosa, Harv. is recorded for False Bay (Barton). 
9. Monospora, (Sober) = Corynospora ramulosa, J. Ag. 
Submerged rocks near Kei mouth. 
10. Pleonosporimn Harveyanum, (J. Ag., de Toni) = Halothamnion 
Harveyanum, (J. Ag.). 
Submerged rocks, British Ivaffraria ; low tide rocks, Table Bay. 
P. Tysoni, Barton. 
On Gigartina radula, Table Bay, Three Anchor Bay. I have 
found this plant at St James (False Bay) at half tide on plants oi 
Gladophora hospita. For a description of this plant see BartonO, 
Journ. Bot. xxxiv, p. 195, 1896. 
11. Callithamnion stuposum, (Suhr.). 
Submerged rocks, Algoa Bay, Kowie. One specimen tiom 
Flanagan’s herbarium named Dasya scoparia has been ienamed 
by Tyson, C. stuposum. 
C. verticillatum. No locality given. 
C. purpuriferum, Ag. ( = Aristothamnion purpuriferum) . 
Not recorded. (Cape Point, Kalk Bay, Table Bay. Barton CD.) 
Note. Other species recorded by Barton are : C. constrictum, 1 oit Natal , 
C. gracile, Simon’s Bay; C. variegatum, Algoa Bay; C. densum , 
8 
B. H. 
