Eu-Florideae, Corallinacese, Lithothamnion. 1759 



Pol. flex. p. 315, Kuetz. Phyc. gen. p. ;J85, t. 78, f. 1, Sp. p, 69(1, 

 Harv. Ner. austr. p. 111, Man. oil. 'i p. 109, .\rescli. in .1. A;^'. 

 Sp. II, p. 512, Hauck Meprestil^feii p. 265 (excl. synou.), f. 104, 

 Rosau. Rech. Melo!.. p. (1(1, i. 2, 1". i:;-l(;, t. 3, 1". 1, Epilitlion 

 membranacea (sic!j Heydr. Molobesi;e (1897) p. lOH, Corallina 

 7nemhranacea Esper Zooph. t. 12, I". 1-4. — Crusta orbiculari, reni- 

 foruii aut aunuliforuii, s.epo ui ir^ine irregulariter creuulat;i, te- 

 nuissiuia, pagina inferiori totl adnata, parce calce iudurata, uio- 

 nostroniatica, prope concept.icuia 4-5-strouiatica; conceptaculis 

 sporangiferis plus minus nuinerosis, per totam crustrje superficiein 

 dispositis, nonnuufiuam coufluentibus, verruca'formibus, carpospori- 

 feris et antheridiferis fere hemisphtericls. 



Hab. in plantis mariuis variis iu oninibus fere m;iribus, in 

 oceano Atlantico ab oris Norvegise usque ad prouiontorium Capitis 

 Bonae Spei Africie australis (Harvey); in mari Mediterraneo et 

 Adriatico (Hatjck, Ardissone). — Frons primum teniiissime mem- 

 branacea, subrugosa, vix calcarea, coloris griseo-caerulescentis, 

 adulta calcarea, nunc rubra vel purpurea, nuuc cretaceo-alba vel 

 virescens, diametro 1-4 mm. ;equans, rarius a centro ad periphe- 

 riam, ut Melobesia farinosa, rimosa, supra modo Isevis, modo 

 lamelloso-imbricata. Conceptacula sporangifera circ. 200 [i.. diam. 

 metientia, tegmine eximie poroso, evacuata late ;iperta. 



76. Lithothamnion cortlciforme (Kuetz.) Fosl. Rev. Syst. Surv. of 28oo 

 Melob. (1900) p. 15, Hapalidium hildebrandtioides Crouau in 

 Batters Mar. Alg. of Berwick-on-Tweed p. 13G, Hapalidiitm ro- 

 seoluni Kuetz. Phyc. gener. p. 385, Sp. p. (;95, Tab. Phyc. XIX, 



t. 92, f. a-b (non Hapalidium roseum Crouan), Melobesia corti- 

 ciformis Kuetz. Spec. p. 696, Tab. Phyc. XIX, t. 94, f. c-d, Rosan. 

 Rech. Melob. p. 75, t. 1, f. 14-16, Solms Corall. p. 11, t. 3, f. 25, 

 Melobesia rosea Ros;m. Rech. Molob. p. 77, Lithocystis Allmanni 

 Harv. Phyc. Brit. t. 166, Hapalidium confernoides Batters Mar. 

 Alg. Berw. p. 136. — Obducens, frondibus parvulis in crustam 

 albido-griseam vel opaco-roseam tenuissimam indefinitam conti- 

 uuam, minutim sed evidentissime tuberculalam et perforatam con- 

 fluentibus. 



Hab. in fronditnis G e I i d i ;i c e a r u m , R h o d y m e u i ;e , F u r - 

 cellarise, Chondri etc. in oceano Atlantico, passim (Kuetzing); 

 in frondibus Bryopsidum in mari Adriatico fKuExziNG). — 

 Conceptacula sporangifera pellucida, tetrasporangiis piriformibus. 



77. Llthothamnion monostromaticum Fosl. Two new Lithoth. (1903) "^sui 



