Phaeozoosporinoe, Ralfsiacefo, Ralfsia. 313 



pansiP, nipibiis adiiata», lohis nuinerosis, luio snper alterum inil)ri- 

 catis, constltuta\ Lobi a superficie eniergentes et eideni quoad nia- 

 ximam partem inferiori sua pagina adnatie, margine libero integer- 

 riino, circumscriptionc reniformes, concentrice et prjiecipue longi- 

 tudinaliter striata^ juniores perpnsilli, demum ungue majores. Pa- 

 giiia superior et inferioris partes libene sunt gla,berrimte. Color fere 

 castaneus. 



4. Ralfsla expansa .T. Ag. Sp. I, p. 63, Kuetz. Sp. p. 544, Myrionema? 504 

 e.i'p(insH}}i .J. Ag. Alg. Liebm. p. 7. — Fronde fuscescente, orbicu- 

 lariter expansa in crustam margine lobatam, medio subcontinuam, 

 liic illic in pustulas elevatam, filis cylindraceis, arctissime stipatis, 

 articulatis, articulis diametro longioribus. 



Hah. ad rupes madreporicas sinus Mexicani; ad « V. Cruz » (Lieb- 

 mann). — Ralfsim verrucosw proxima, at quantum e speciminulis 

 paucis videre liceat diversa. Margines in lobos discretos hic illic 

 separantur, ita quodammodo transitum ad sp. pr?ecedentem prsebens. 



Si(0(/. II. Stragularia (Stroemf.) Batt. Mar. Alg. of BerwicIi-on-Tweed p. 67 

 (emend.): Fructus in maculas irregulares vel in stratum continuum congesta. 

 CelluUe stratus basalis secus lineas rectas verticales ordinata. 



5. RaJfsia clavata (Cann.) Farl. Mar. Alg. of New Engl. p. 88 (non 505 

 Crouan), Reinke Algenfl. westl. Ostsee p. 48, Atlas deutscher Mee- 

 resalgen t. 5-6, f. 14-20!, Kuck. Bemerk Algenveg. v. Helgoland 



p. 244, lig. 14, Myrionema? clavatum Harv. Manual p. 124, 

 Kuet/. Sp. p. 540, Myrionema Henscliei Casp, Seealgen von Neu- 

 kuhren (1871), p. 142 teste Reinke, Zm/i/a clavata Carmich.in Harv. 

 Phyc. brit. t. 348, Stragularia at^lhcerens Stroemf. Om Algveg. vid 

 Islands Kyster p. 49, t. 2, f. 13-15 teste Reinke. — Crusta tenui, 

 arcte matrici adnata et tunc tiegre secedente, 2-20 mm. lata; soris 

 sporangiferis plerumque levibus; filamentis verticaliter e strato 

 basali adscendentibus subrectis (si arcuatis latere concavo margini 

 opposito. 



Hah. ad saxa, conchas etc, in regione littorali aut sublitto- 

 rali in Oceano Atlantico, ad oras Islandia?, Groenlandioe, Norvegiie 

 ' Helgolandise, Anglise et Americae borealis ; in mari Baltico prgecipue 

 in sinu Kiliensi (Reinke). — Sporangia unilocularia (matura) 40- 

 60 V 12-18. Species, ut videtur, monoica. Fructifera a?stivo et au- 

 tumnali tempore. 



6. Ralfsia pusilla (Stroemf ) Batt. Addit. Not. on Mar. Alg» of Clyde 506 



