Marine Algce of the Orkney Islands. 335 



Family.— CORALLINACE^ 



HAPAI.IDIXJ1SI, Kiitz. 



226. Hapalidium Hildenbrandtioides, Crn. 



At Kirkwall Bay, opposite Iceland Skerry, epiphytic on Pliyllo- 

 jihora rubeiui, 1887 (G. AV. T.). Identified by E. M. Holmes. 



MELOBESIA, Lamour. 



227. Melobesia farinosa, Lamour. 



Epiphytic on Phyllopliora ruhens, Kirkwall Bay, 1887 (G. W. T.). 

 Identified by E. M. Holmes. 



228. Melobesia pustulata, Lamour. 



Epiphytic on Fastvjlaria furcellata and other Algaj. Common. 



229. Melobesia Laminarise, Crn. 

 Epiphytic on Laminaria hijperborea. 



230. Melobesia Lenormandi, Aresch. 



On shells and stones between tide marks. 



LITHOTHAMNION, Phil. 



231. Lithothamnion calcareum (Ell. and Sol.), Arescli. {Melobesia 



calcarca, Ell. and Sol.) 



Common on sandy bottoms, 4 to 15 fathoms. Perennial. 



232. Lithothamnion fasciciilatujn, Aresch. {Melobesia fasciculata, 



Harv.) 



Found by Mr Pollexfen at Kirkwall Bay. Identified by Mr 

 Batters. Kew to Orkney. 



233. Iiithotliain.nion polymorphvun (Linn.), Aresch. {Melobesia poly- 



morpha, Linn.) 



Common on rocks in pools between tide marks ; also in deep 

 water. 



CORALLINA, Linn. 



234. Corallina officinalis, Linn. 



Usually in rock pools between tide marks. Perennial. Fruit in 

 winter and spring. 



235. Corallina rubens, Linn. {Jania rubens, Lamour.) 



Ei)iphytic on several of the smaller Algse between tide marks. 

 Perennial. Fruit in summer. 



