THE TYSON COLLECTION OF MARINE ALGAE 91 
however, less accessible, and have not been worked sufficiently to make a 
fair comparison of the east and west coast at present possible. 
In the following lists, the distributions first recorded are the localities 
mentioned on the herbarium sheets. In brackets are added any other localities 
mentioned by Miss Barton in her papers of 1893 (or in subsequent papers when 
specified), and finally any additional localities observed by ourselves. 
1 n CYANOPHYCEAE. 
1. Chroococcaceae. 
Note. We have found a member of this family (probably a species of 
Aphanocapsa ) on granite rocks at Sea Point. 
2. Chamaesiphonaceae. 
Note. Tyson has no representative of this family in his collection. 
Dermocarpa prasina, Born, is given by Miss Barton (l) as occurring 
on Rhizoclonium at Knysna and on Cladophora rupestris at the 
Cape. 
3. OsCILLATORIACEAE. 
10. Lyngbya majuscula, Harv. 
No locality given. We have found this species at Kalk Bay and 
Sea Point. Miss Barton (2) records it from the mouth of the Kei. 
Note. In addition to L. majuscula the following species have been re- 
corded by Miss Barton (l, 2): L. semiplena, J. Ag. from Sea Point, 
and L. aestuarii, Liebman, from the Cape. Besides these we have 
found at Glencairn a species, golden brown in colour and which 
appears to be near to L. ferruginea, Ag. 
5. SCYTONEMATACEAE. 
2. Scytonema sp. (provisionally placed as Scytonema). 
Sea Point, Kalk Bay, Glencairn. 
Note. This alga was not represented in Tyson’s collection, but has been 
added to it by us. It is very abundant in the localities mentioned 
in rock pools near the high tide level. The plants, except in the 
very young stages, are brownish in colour. 
7. Rivulariaceae. 
4. Calothrix confervoides, Dill, (on Chaetomorpha). 
Cape Morgan. 
Note. C. Crustacea , J. Ag. is recorded from Kalk Bay (Barton(i)) and 
C. aeruginea, Thur. also from Kalk Bay (Barton(2)). 
7. Ulvaceae. CHLOROPHYCEAE. 
2. Ulva lactuca, L. 
Three Anchor Bay, Cape Morgan. 
