102 
THE TYSON COLLECTION OF MARINE ALGAE 
P. laciniata, Ag. 
Table Bay, Three Anchor Bay, Algoa Bay, Kowie. (Also recorded 
from Seal Island, Knysna, Port Natal. Barton (i); and Kalk Bay.Delf.) 
P. capensis, Kiitz. Regarded by some as a form of P. laciniata. 
Table Bay. 
P. Augustineae, Kiitz. 
Sea Point. (Also Robben Island. Barton (l).) 
Note on the Genus Porphyra. 
The species of Porphyra are somewhat ill defined, and require 
further investigation. The genus is of general occurrence on the shores 
of the Peninsula, and is very abundant at the high tide level on the 
rocks and boulders of both east and western coasts. We find that in 
P. laciniata, the larger fertile fronds bearing carpospores occur high 
on rocks, whilst smaller paler fronds bear monospores and are found 
lower down or beneath the larger purplish fronds. 
II. Florideae. 
(a) N EMALIONALES. 
3. Helminthocladiaceae. 
3. Chantransia, sp. ? secundata. 
Note. There was no specimen of this genus in the Tyson collection, but 
we have found a specimen bearing monospores thickly coating 
the stipe of an old frond of Ecklonia huccinalis thrown up on 
the shore at Hout. Bay. ( C . secundata on Laminaria is recorded 
by Barton (i) from “near Cape Town.”) 
6. N emalion furcellatum, n. sp. Reinbold. 
Cape Morgan. One specimen. 
Note on Nemalion furcellatum. 
This seems to be an exceedingly rare form. It has been seen “only 
at Three Anchor Bay as an annual and seldom after the New Year.” 
The specimens are all sterile, and were described by Tyson(9) (Journ. 
Bot. June 1921, li, p. 200). 
7. Helminthostachya anstantio, J. Ag. 
Cape Morgan. One specimen. 
Note. Miss Barton (i) records also Helminthora divaricata as occurring 
at the Cape. 
4. Chaetangiaceae. 
1. Scinaia furcellata, (Thurn.) Bivon. 
Cape Morgan, Great Kei mouth. (Also Cape Point. Barton(i).) 
S. salicornioides , Kiitz., J. Ag. 
Submerged rocks, Sharks Bay, Kowie. (Also Port Natal. Barton.) 
3. Galaxaura obtusata, (Soland) Lamour. 
Isipingo, Natal. (Also Port Elizabeth, Algoa Bay, Port Natal. 
Barton (i).) One specimen. 
