1786 Eu-Floride£e, Corallinaceae, Lithophyllum. 



Some Lithoth. (1897) p. 3: crusta 10 cm. longa, usque ad 6 cm. 

 lata, tenuiore quam in typica forma, arctius ad matricis superficiem 

 repente, aurantiaco-rufescente, concentrice plicata, hinc inde verru- 

 culosa. In mari Mediterraneo ad oras Galliae (Flahault) et sinus 

 Neapolitani (Foslie). 



23. Lithophyllum incrustans Phil. in Wiegm. Arch. 1837, vol. 1, p. 388, 2888 

 Aresch. in J. Ag. Sp. II, p. 519, Sohiis Corall. p. 16, Lithothamnion 

 incrustans Fosl. Norw. Lithoth. p. 94, Spongites incrustans Kuetz. 

 Sp. p. 698, Spongites racemosa Kuetz. Phyc. gener. p. 386, Sp. 



p. 698, Tah. Phyc. XIX, p. 35, c. ic, Lithothamnion polymor- 

 phum auct. nonnull. ex parte, Spongites confluens Kuetz. Sp. 

 p. 698, Tab. Phyc. XIX, t. 97 (sec. Foslie), Lithothamnion cle- 

 pressum Crouan Fl. Finist. p. 151, Lithothamnion incrustans f. 

 depressa Fosl. Norw. Lithoth. p. 94, t. 18, f. 10-11, Lithothamnion 

 ponderosu7n Fosl. On Some Lithoth. (1897) p. 15?. — Crusta 

 crassa, rufo-albida, corpora aliena incrustante, margine integra vix 

 lobata. 



Hah. in mari Mediterraneo ad oras insul;^ Sicilioe (Philippi) 

 et sinus Neapolitani (Solms); in mari Adriatico (Kuetzing, Hauck); 

 in oceano Atlantico ad oras Galliie (Bornet, Crouan, Le Jolis) et 

 Britannite (Harvey, Battersj. — Conceptacula sporangifera sec. 

 Foslie (qui hyec organa in L. depresso Crouan scrutatus est) irre- 

 gulariter sparsa aut aggregata, punctiformia, orbiculari-depressa, 

 50-80 [t. diam., dein ampliora ad 80-120 jj.. lata, poro 15-20 [x. 

 diam. pertusa, sporangiis 2-4-sporis. Conceptacula carposporifera 

 convexa subhemisph;erica, 150-200 [x. diam. aequantia, parum promi- 

 neiitia. Ceterum de hac specie ejusque formis cfr. ohservationes tum 

 a cl. Foslie Norw. Lithoth. p. 94 et seq., Some new or crit. Lithoth. 

 (1898; p. 17 (f. angulata), New or crit. calc. Alg. (1900; p. 28, 

 tum a claro Heydrich Ein. neue Melob. des Mittehn. (1899) p. 225 

 (f. flabellata, f. subdichotoma, f. labyrinthica) exhibitas. An revera 

 huc pertineat Lithothamnion ponderosum Fosl. e « S. Thomas» 

 Africce lectum, dubitare licet. 



24. Lithophyllum orbiculatum Fosl. Rev. Syst. Surv. of Melob. (1900; 2889 

 p. 19, Litiiothamnion orbiciUatum Fosl. Norw. Lithoth. p. 143, 



t. 22, f. 10-11. — Crusta orbiculari vel suborbiculari, arcte adnata, 

 sublevi, limbo tenuissimo, margine leviter unduhito-crenato; con- 

 ceptaculis sporangiferis convexiusculis, parum prominentibus. 



Hab. in lapidibus in « Christiansund » (Ekman); eadem species 

 ad «Arran» Britanniie (Batters, Foslie). — Cnista e purpureo 



