528 Dr. W. H. HAE-\rET's Account of the Marine Botanij of 



and Ectocarpus siliculosus, two plants of rapid growth, and both belonging to 

 forms which are rare in the warmer, and abundant in the colder waters of the 

 sea. Just above the laminarian belt, and extending into it, several social Lau- 

 rencice, both here and on other parts of the coast, cover the rocks, often in very 

 wide patches. 



Nothing of any interest was collected in Oyster Harbour ; nor was dredging 

 in the Sound attended with any very remarkable result. Very little of the 

 amount dredged had been detached by the dredge ; the greater portion con- 

 sisted of drifting plants, collected by currents and eddies on various parts of 

 the sandy bottom. The deepest fucoid plant, observed m situ, was Scaberia 

 Agardhii, which abounds on every part of the coast explored by me in 2-5 fa- 

 thom water. Wherever Caulinia antarctica can find a footing, its wiry stems, 

 but rarely its leaves, are generally found covered with parasites, many of which 

 (such as Thuretia, Halophlegma, and various Dasyce) are very curious and beau- 

 tiful. The parasites on Zostera, on the contrary, usually grow on the leaves, 

 not on the stem ; and here are found Chondrice, Griffithsice, CaUithamnia, 

 Wrangelice, Crouanice, &c. 



I spent the month of March at Cape Riche, a bold promontory, about 60 

 miles by compass, and 70 or 80 by land, to the east of King George's Sound; 

 and famous for the beauty and variety of flowering plants found on the hills in 

 its neighbourhood. Here I was the guest of George Cheyne, Esq., who has 

 a farm and sheep-run at the Cape. The dry season had advanced too far to 

 permit my seeing this beautiful district to the best advantage, or to allow of 

 my making an extensive gathering of land plants ; and the sea-shore proved to 

 be singularly barren in Algaa. The ordinary Fucoidece {Sargassa and Cysto- 

 phorce), with Ecklonia radiata, chiefly occupy the laminarian zone; and the 

 smaller Rhodospermece, scattered among them, are few, and of little interest. 

 Here, nevertheless, I collected a new Genus (Lasiothalia), and a remarkably 

 fine Liagora (L. Cheyniana). 



Early in April I started, overland, for Swan River, and on the 21st reached 

 Fremantle, where I remained till the 21st of May ; and returned again for the 

 first fortnight in July. At this place the algologist must depend, either on the 

 dredge, or on the western gales, which frequently throw drifted plants ashore. 

 The coast at both sides of the town, which is built on a little calcareous pro- 



