THE TYSON COLLECTION OF MARINE ALGAE 
93 
tubular but rather like an Ulva in structure. The other specimen 
on the sheet is E. compressa. 
We have made the following observations: E. compressa is by 
far the most common species of Enteromorpha on the Cape Penin- 
sula, and is almost universally present. In one pool at Kalk Bay 
we found E. compressa and Bryopsis setacea growing together. 
On examination it was seen that the Enteromorpha established 
itself when young on the Bryopsis, gradually killing off the latter, 
though in nearly all cases we were able to find the original 
Bryopsis plant on which the Enteromorpha had first obtained its 
footing. 
We have found E. percursa at Three Anchor Bay and Glen- 
cairn; E. intestinalis at Kalk Bay, and E. Lima at Sea Point. 
14. Cladophoraceae. 
Note. Miss Barton (2) records Urospora penicilliformis, Aresch. growing 
on Chaetangium saccatum at Kalk Bay. 
2. Chaetomorpha clavata (Ag.) Kiitz. 
Table Bay, Camps Bay, Sea Point, Port Nolloth. 
(False Bay to Algoa Bay, Cape Point. Bartond).) 
C. Natalensis, Harv. 
Cape Morgan, British Kaffraria. 
C. crassa, Kiitz. 
Cape Morgan, Kei mouth. 
Note. Miss Bartond) records the following species in addition to the 
above: C. Linum, Kiitz., Port Natal; C. aerea, Kiitz., Kalk Bay. 
We have confirmed the presence of C. aerea at Kalk Bay, and 
have found C. littorea in pools on granite at Sea Point. 
Note. There are no specimens of Rhizoclonium in Tyson s collection. 
Miss Bartond), however, records three species, viz. R. riparium, 
Harv., Knysna; R. arenosum, Kiitz., Cape; and R. tortuosum, 
Kiitz., Knysna. 
4. Cladophora Eckloni (Suhr), Kiitz. 
Walfisch Bay, Table Bay, Sea Point. 
(Robben Island, Cape Agulhas. Bartond).) 
C. hospita, (Mert.) Kiitz. 
Table Bay, Robben Island, Sea Point. 
(Green Point, Cape Point, Cape Agulhas, Knysna. Bartond).) 
C. catenifera, Kiitz. 
Table Bay, Kowie, Cape Morgan, Green Point. 
(Kalk Bay, Algoa Bay, Port Alfred. Barton d, 2).) 
C. flagelliformis, (Suhr.) Kiitz. 
Table Bay, Sea Point. 
