Eu-Florideie, Coralliiiacete, riitliotliamnion. 1747 



depressa (ob corticis delapsuni; acuteque definita, quasi ci-ateri- 

 formi. 



Hnb. in proiundiore uiari in jjfulfo Neapolitano (I)oiirn). — Con- 

 ce[)aacula sporan<.,dfora 550-700 \i.. diani. metienti;i, tegniine rana- 

 libus circiter 20 intersecto. Conceptacula aliena (forsan antheridi- 

 feraj conica, acutiuscul;i, pauca, circiter 400 \i.. di;un. 



48. Lithothamnion Bornetii Kosl. Some new or crit Litii. iis<)S) p. 0. 2772 

 — Fronde crustiformi, 1-1,5 cm. diani., fere 0,5 nun. cnissa, in;i> 

 quali, hinc inde excrescentias verruciformes aut irre<,nilar(>s basi 

 passim confluentes, 2 mm. altas, 2-3 mm. latas proferente ; con- 

 ceptaculis sporangiferis sparsis, subinde in crusta et excrescentiis 

 dense confertis, prominentibus, circularibus oblongisve. 



Hab. in oceano Atlantico ad muros portus militaris w Cher- 

 bourg » Galliae (Bornet). — Conceptacula sporangifera 200-300 [j.. 

 diam., centrali parte depressa, tegmine canalil)us 20-35 crassiu- 

 sculis intersecto. 



49. Lithothamnion synanablastum Heydr. Corallinace;e insbes. Melob. 2773 

 (1897) p. 54, t. 0, f. 14, LUhotliamnion synanablastum f. conspersa 

 Fosl. New or crit. calc. Alg. (1900) p. 11 (nomen). — Crusta 

 melobesiaeformi, tenui, medio 0,25 nnn., margine usque ad 1 mm. 

 crassa, inferiori parte tota adnata, ambitu indeterniinat;i, irregula- 

 riter rotundata, stepe lobata, usque ad 6 cm. di;im. metiente, medio 

 levi, marginali zona subundulato-crispata; conceptaculis partem 

 crustae centralem levem occupantibus, verrucas valde planatas si- 

 stentibus. 



Hab. in rupibus gnmiticis et conchis ad « False Bay » ('apitis 

 Bonse Spei Africse australis (Marloth). — Conceptacula sporangi- 

 fera 170-250 \i.. diam., tegmine plano canalibus paucis intersecto, 

 sporangiis 150*35-40 [j.. Conceptacula sexualia 300-350 [j.. diam., 

 apice vix elevato instructa. — forma speciosa F^osl. New or crit. 

 Calc. Algse (1900) p. 11, Rev. Syst. Surv. of Melob. (1900) p. 14: 

 pagina crust?e inferiori rhizoidibus numerosis apice cupulatim ex- 

 pansis instructa. Cum forma typica. 



50. Lithothamnion Sonderi Hauck Meeresalgen p. 273, t. III, f. 5, 2774 

 Fosl. Norw. Lithoth. p. 127, Heydr. Lithoth. von Helgoland (1900) 



p. 77, t. II, f. 20-22. — Crusta 0,2-2 mm. crassa, pagina inferiori 

 tota adnata, in;equali, dense verrucosa; conceptaculis sporangiferis 

 valde applanatis, superne tegmine poroso donatis, sparsis vel ag- 

 gregatis, 350-500 (i. diam., carposporiferis subconico-hemisphaericis. 

 Hab. ad scopulos lapidesque in mari Nordico pr. insulam Hel- 



110 



