Clare Island Survey — Marine Algae. 15 151 



a sa place, niais le trou est circulaire. Si on conservait l'independance des 

 deux especes, il faudrait admettre que dans ehacune on ne connait qu'ane 

 seule sorte de conceptacles. Dans THerbier Bornet ces deux especes sunt 

 s^parees; j'ai cherche en vain des conceptacles a cystocarpes pour le 

 E. corticiforme. D'ailleurs d'apres les descriptions de liosanoff et de de Toni 

 il est impossible de les distinguer. Hauck les a reunis." 



It is clear that the present species cannot be retained in Lithothamnium ; 

 and Dr. Lemoine believes that Heydrich, who first clearly pointed out its 

 peculiarities, was justified in forming a special genus for its reception, and that 

 it is advisable to adopt his name. The nomenclature is, however, somewhat 

 complicated by the question of the validity of Kiitzing's genus Hapalidium. 

 E. membranaceum is common in the Survey area, being found most often on 

 Rhodymenia palmata and Furcellaria fastigwtu . In autumn it is not infrequent 

 on Cladophora rupestris in shallow pools near high-water line, to which it 

 gives a very curious appearance. It is also found occasionally on other algae 

 and on shells (Trochus). 



Distribution. — British Isles (frequent), Norway, Sweden, N. and W. France, 

 N. Spain, Mediterranean, Crimea, Morocco (Atlantic coast), Ceylon, California. 



Corallina squamata Ellis. 



This species is probably much more common in the warmer parts of the 

 British Isles than is generally supposed. On the exposed coasts of Clare 

 Island it is, as explained on p. 40, probably more abundant than C. officinalis. 

 In the south of England also, I have noted it very frequently in similar 

 localities. 



3. Economic Species. 

 Kelp. 

 Kelp-burning forms an. important feature in the yearly routine of the 

 islanders, as it does also on the exposed coasts of the mainland. During the 

 last weeks of June and in the beginning of July dense clouds of heavy oily 

 smoke may be seen along the coast-line, and the preparation for this general 

 burning provides employment for many months. In a leaflet issued by 

 the Congested Districts Board 1 practical advice is given, including notes 

 as to the relative value of the different seaweeds, and instructions as to the 

 best methods of burning. Each species is figured, and also certain weeds 

 which should be avoided. 



Board 



1 "The Kelp Industry. Hints for Kelp-burners with regard to Seaweed." Congested Districts 

 d Leaflet. 1898, 



