110 
THE TYSON COLLECTION OF MARINE ALGAE 
Note. A specimen labelled Caloglossa Leprieurii, Harv., seems to belong 
here as some species of Lomentaria. 
14. Champia compressa, Harv. 
Shark’s Bay, Kowie. (Also Kalk Bay, Muizenberg, Cape Agulhas, 
Kynsna, Algoa Bay and Port Alfred. Barton (i).) 
We found very young fronds of this alga at Kalk Bay at low 
spring tides near the water’s edge on June 20; when quite 
fresh they had an irridescent appearance. 
C. lumbricalis, (Roth.) Lamour. 
Rocks and ledges, low tide, Table Bay. (Also Robben Island, Sea 
Point, Cape Point, Cape Agulhas. Barton.) 
Note. This alga is fairly abundant at Camp’s Bay where we have found 
it fertile, exposed only at low spring tides, usually on flat rock 
surfaces. The tetrasporic and carposporic plants are almost 
indistinguishable until the cystocarps are well developed. It 
is comparatively rare in our experience at Kalk Bay. 
17. Plocamium corallorhiza, (Turn.) Harv. 
Deep water, Table Bay, Kowie, Cape Morgan. (Also Robben 
Island, Cape Point, Cape Agulhas, Cape Recife, Port Alfred, 
Kei mouth and Natal. Barton (i).) 
I have found this only at low water during low spring tides on 
rocks at Kalk Bay. In June the plants were all fertile bearing 
tetraspores. 
P. Robert siae, Schmitz. 
The Kowie. Only two specimens, from Becker’s Herbarium. 
P. cornutum, (Turn.) Harv. 
Kalk Bay, Three Anchor Bay. (Also Table Bay, Sea Point, Camp’s 
Bay, Cape Agulhas, Natal. Barton(i).) 
P. rigidum, Kiitz. 
Three Anchor Bay in pools. (Also Muizenberg. Barton(i), 1893; 
and Kowie. Barton(2), 1896.) 
P. condensatum, Kiitz. 
Cape Agulhas. 
Note. On one specimen Tyson has written that P. rigidum and P. con- 
densatum are identical forms. On examination of the specimens, 
we found that the former species are all carposporic and the 
latter are all tetrasporic plants, which may possibly account 
for the slight differences between them. 
P. coccineum, Lingb. 
Cape Morgan. (Also Table Bay, Kalk Bay, Algoa Bay, Natal. 
Barton (i).) We have also found this form at Glencairn (Oct. 
1920). 
