Ru-Floridea3, Ooi'allinacetB, Derraatolithon. l77:3 



Melobesia hapalidioides Crouan List. Alg. inar., V\. Finist. p. 1.50, 

 Melohesia simulans Crouan Fl. Finist. p. 150, Lithophylkun ha- 

 palidioides lloydr. Litii. Mus. Paris (1901) [). .587. — Crusta 

 rosea, niar^nnibus subtiliorc, orliiculari, lobatii, crenulata aut in- 

 tegra, levi; conceptaculis proniinentibus, sublieinisplKerico-conicis, 

 poro minutissiino pertusis, sporangiis bisporis claviformibus aut 

 piriforniibus. 



Hah. in fragmentis porcellaneis, in conchis Anomice, Balani 

 etc. in oceano Atlantico ad littora Galli;e (Chouan, Bornet, Debu.vy, 

 Le Jolis) et ad « Berwick-on-Tweed» Britannine (Batters); eadem 

 ad oras Hibernice (Foslie). — Crustoe 1-2 cm. latte, ad 400 [j., 

 crassfB, usque 8-stromatic;e. Conceptacula sporangifera mamill;e- 

 formia, 350-450 |j.. diam. metientia. Sporangia bispora (nec tetra- 

 spora ut habent pro M. sr;ni</an^e fratres Crouani 70-120 « 40-()0. 

 — f. confinis (Crouan) Fosl. Remarks on Melob. in Herb. Crouan 

 (1899) p. 12, Rev. Syst. Surv. of Melob. (1900) p. 22, Melohesia 

 confmis Crouan Fl. Finist. p. 150, Johns. List of Irish Corallin. 

 p. 27: crusta dilute violacea, 1-2 cm. lata, duriuscula, lobata; con- 

 ceptaculis parvis, hemisph;Tericis, numerosis, sporangiis bisporis. In 

 Gelidiis, Corallinis (?), Patellis, Balanis etc. in oceano 

 Atlantico ad oras Galli;e borealis (Le Jolis, Crouan) et Hiberni;e 

 occidentalis (T. Johnson). — Adsunt quoque, fide Crouan, concepta- 

 cula carposporifera. 



Dermatolithon? adpiicitum Fosl. Rev. Syst. Surv. of Melob. (1900j 2854 

 p. 22, Lithothamnion adplicitum Fosl. On some Lithoth. (1897) 

 p. 17. — Crusta insequali, versus margines irregulariter crenatos 

 subtiliore et zonata, hinc inde excrescentiis paucis minutissimis 

 verruciformibus irregularil)usve instructa. 



Hah. m conchis Pholadis, sociis Li tho tham ni is et Bryo- 

 zois, in oceano Atlantico pr. «Bognor» Britanni;e (Batters). — 

 Crustse 2-3 cm. Iat;i3, 300-600 [j.. crass». Conceptacula (carpospo- 

 rifera?) convexa aut subhemisph;erica aut depresso-conica, 350- 

 650 ;x., poro unico instructa, versus margines confertim disposita. 

 Dermatolitiion? prototypum Fosl. Rev. Syst. Surv. of Melob. (1900) 2855 

 p. 22, Lithothamnion prototypum Fosl. On some Lithoth. (1897) 

 p. 18. — Crustis parvis, margine tenuioribus matrici laxe adhce- 

 rentibus, primum suborbicularibus, dein confluendo irregularibus, 

 demum lamellis squamulosis superpositis crustas novas supra pri- 

 mariam formantibus; conceptaculis carposporiferis per crustam, 

 peripheria excepta, sparsis, s;epius depresso-conicis. 



