128 M. FOSLIE. [1905 



algae. Thus most specimens which I have seen from the Adriatic 

 belong to f. intermedia, growing on substrata of rather different 

 kind, and the same is the case in several other areas. 



The denomination, therefore, should be as stated below. Some 

 consequent changes as to the synonyms are less important and 

 will, as far as possible, be made on a later occasion. 



Lithophyllum pustulatum (Lamour.) Fosl. 



It appears from the area recorded above that the species — 

 according to the circumscription now proposed — is at present 

 known no farther to the north than Cherbourg and probably the 

 southern coasts of the British Isles. 



3. Lithophyllum macrocarpum (Rosan.) Fosl. mscr. 

 Melobesia macrocarpa Rosan. Rech. Melob. (1866), p. 74. Cp. 



under f. macrocarpa, pag. 117. 



f. intermedia Fosl. mscr. 



Cf. pag. 117 and 126. 



f. fceroensis Fosl. 



Rem. Melob. Herb. Crouan (1900), p. 15. Cp. under f. macro- 

 carpa, pag. 117 and 126. 



f. Laminarke (Cm.) Fosl. mscr. 



Cf. pag. 118 and 126. 



4. Lithophyllum hapalidioides (Crn.) Fosl. 



Alg. Not. (1904), p. 3; Melobesia hapalidioides Cm. Fl. Finist. (1867), p. 150! 

 f. typica. 



Frond orbicular, often becoming confluent and indefinite, 200 

 — 600 /i. thick, lobed, crenulated or entire, smooth, 

 f. confinis (Crn.) Fosl. 



Rem. Melob. Herb. Crouan (1900), p. 12; Melobesia confinis Crn. 1. c. partim! 



Frond loosely and irregularly subsquamellate-imbricate. 



Syn: Melobesia simulans Crn. 1. c. p. 150! 



Dermatolithon hapalidioides Fosl. List of Lithoth. (1898), p. 11; Rem. Melob. 

 Herb. Crouan. (1899), p. 12; Borg. Mar. Alg. Faeroes (1902), p. 402! Batt. Cat. 

 Brit. Alg. (1902), p. 97! De Toni, Syll. Alg. (1905), p. 1772. 



Lithothamnion adplicitum Fosl. On some Lithoth. (1897), p. 17. 



Dermatolithon? adplicitum Fosl. Rev. Syst. Surv. Melob. (1900), p. 22; Batt. 

 Cat. Brit. Alg. (1902), p. 97! De Toni, Syll. Alg. IV (1905), p. 1773. 



