No. 3] REMARKS ON NORTHERN LITHOTHAMNIA. 13 



f. sublcevis Fosl. 



Lithothamnion Lenormandi f. sublaevis Fosl. Norw. Lithoth. 1. c. 



f. typica. 



Lithothamnion Lenormandi f. typica Fosl. 1. c. ; Lithophyllum Lenormandi 

 Rosan. Rech. Melob. (1866), p. 85, pi. V, fig. 16—17, pi. VI, fig. 1—3. 



f. squamulosa Fosl. 



Lithothamnion squamulosum Fosl. Norw. Lithoth. (1895), p. 155, pi. 19, 

 fig. 24—26. 



Syn: Melobesia Lenormandi Le Jol. Liste Alg. Cherb. (1863), p. 151! Crn. 

 Fl. Finist. (1867), p. 150; Kleen, Nordl. Alg. (1874), p. 1 1 ; Aresch. Obs. Phyc. 

 Ill (1875), p. 1! Farl. New Engl. Alg. (1881), p. 181, partim! Traill, Alg. Mar. 

 Orkney (1890), p. 36. 



Lithophyllum Lenormandi Solms, Corall. Monogr. (1881), p. 15; Kjellm. N. 

 Ish. Algfi. (1883), p. 136; Hauck, Meeresalg. (1885), p. 267, fig. 110, t. Ill, fig. 4! 

 Reinke, Algenfl. westl. Ostsee (1889), p. 32; Fosl. Contrib. I (1890), p. 9, partim. 

 Non Gobi, Algenfi. Weiss. Meer. ! 



Lithothamnion Lenormandi Debr. Cat. Alg. Maroc. etc. (1897), p. 72! Fosl. 

 List of Lithoth. (1898), p. 6, Rev. Syst. Surv. Melob. (1900), p. 15; Heydr. Lithoth. 

 Helgol. (1900), p. 78, t. II, fig. 23—25; Jonss. Mar. Alg. Icel. I (1901), p. 154! 

 Borg. Mar. Alg. Faroes (1902), p. 401! Batt. Cat. Brit. Mar. Alg. (1902), p. 97 ! 

 Fosl. Lithoth. Adr. Meer etc. (1904), p.' 19, 34; De Toni, Syll. Alg. IV (1905), 

 p. 1756 (excl. f. australis). 1 ) 



The form squamulosa perhaps represents only old specimens 

 of f. typica growing on uneven substrata in sheltered places or 

 encumbered with foreign bodies. The frond is 4 — 8 mm. thick, 

 and more or less irregular. It is, however, nearly always loosely 

 squamulose-imbricate, in a vertical section frequently showing a 

 more or less porous appearance. This is not the case in the ty- 

 pical form, which is thinner, more firmly adherent and more clo- 



I admitted it in the List of Lithoth. (1898) p. 7 and in Rev. Syst. Surv. 

 Melob. (1900) p. 14 under the designation of author quoted. However, 

 the species was also in 1897 admitted under the same denomination. Cp. 

 F. Debr ay Catalogue des Algues du Maroc, d'Algerie et de Tunisie. 

 Alger 1897. Pag. 72. This fact De Toni at any rate has been unaware 

 of, to judge from the designation of author which he employs. The Li- 

 thothamnia admitted by Debr ay were determined by me, and he followed 

 my denomination. 

 1 ) In the statement of synonyms here and in the sequel, I set aside such 

 ones as are stated by the author concerned, because in several cases they 

 do not agree with the quoted ones. 



