^28 Mr George Traill on the 



BHODOPHYLLIS, Kiitz. 



179. "Rhodophyllis bifida (Good, and Wood.), Kiitz. {Rhodymenia 



bifida, Grcv. ) 



On rock.'!, and epiphytic on Algae, in deep water. Annual. 

 Summer. Kirkwall Bay, Carness, &c., quiet places, coral bottoms. 

 Also the variety appendiculata, which was found by Mr Pollexfen 

 in Kirkwall Bay. 



EUTHORA, J. Ag. 



180. Euthora cristata (Linn.), J. Ag. [Rhodymcnia cristata, Grev.) 



At Elwick harbour in deep water ; epiphytic on the roots and 

 stems of Laminaria hyperhorea. Annual. Summer. Harvey 

 said these were the finest British specimens he had ever seen. 



HYDROLAPATHUM, Stackli. 



181. Hydrolapathiun sangTiineum (Linn.), Stackh. {Dclcsseria san- 



guinea, Lamour. ) 



Growing in deep rock pools near low-water mark, also under 

 projecting ledges in the shade. Rarely epiphytic on Algae. Large 

 plants in sounds and tide-ways. Biennial. Fruit from November 

 to March inclusive. Common. 



Family.— DELESSERIACE^. 



NITOPHYLLUM, Grev. 



182. Nitophyllum laceratum (Gmel. ), Grev. 



On rocks, and epiphytic on the stems of Laminaria 1iy[.erhorea, 

 near low-water mark, and at a greater depth. Always submerged. 

 Annual. May to September. Fruit in July and August. Hoy 

 Sound, near Stromness, very fine (J. W. Gray) ; Breckness ; near 

 Carness, opposite Iceland Sherry ; Scapa Bay. The varieties 

 Smithii and uncinatum also occur. 



183. Nitophyllum iincinatum, J. Ag. (Agardh's species, but not his 



synoiiyin. ) 



Found by j\Ir Pcjllexfen at Skaill, West Mainland, and for years 

 kept separate by him from his other species of NilopliijUa as some- 

 thing distinct, and quite new to him. IMr Batters, who lately 

 examined the plant, has no doubt about its being N. uncinatum. 

 It is quite different from the var. uncinatum of N. laceratum, which 

 is also found in Orkney. 



184. Nitophyllum Gmelini, Grev. 



On rocks near low-water mark ; also epiphytic on Laminaria 

 hypjerhorea in deep water. Annual. Summer. 



185. Nitophyllum. punctatum (Stackli.), Grev. (Also var. ^ ocdlatum, 



(Grev.), Harv. ; var. -y crispatum, Harv. ; var. S Pollcxfenii, Harv. ) 



Epiphytic on Algse in pools at about low-water mark. Always 

 submerged. Lai'ger specimens in deep water. Annual. May to 



