426 Sipboneae, t)erbes1acese, Derbesia. 



ineJiate iutVa apiceai yeaeratis (vix. 2 mm. ab apice (iistantibu.s) 

 dignoscenda. 



5. Derbesia vaucheriaeformis (Harv.) J. Ag. Till Algernes Systematik i09i 

 VIII, p. ol, Cklorodesmis? vauchericeformis Harv. Ner. bor. Am. 



III, p. 30, t. 40, f, D non C, Br//opsis ienuissima F^arlow New 

 Engl. Alg. pag. 60, t. 4, f. 4, excl. .synon. — Fronde sessili, co- 

 moso-penicillata, fastigiata, obscure viridi, e filamentis innumeris, 

 gracilibus, dichotorais, valde lubricis et subgelatinosis, unicellula- - 

 ribus, cylindraceis constituta; apicibus sequalibus, obtusis. \ 



Hah. ad lapides ad ((Brown's Wliarf, Key West» Floridae (Har- 

 vey), ad alias algas u New England » (Farlow). -t Stipes obsoletus, 

 e massa subbulbosa, filamentis intertextis ramosis conflata constans. 

 Zoogonidangia, observante cl. W. G. Farlow, pedicellum conspicue -1 

 longiorem ac in formis europseis, h. e. longitudine fere ipsum zoo- 

 gonidangium ajquantem et infra medium bis septatum pra^bent. 



6. Derbesia negiecta Berth. ia Mittheil. aus der Zool. Station zu 1092 

 Neapel II. Band p. 77, Hauck Meeresalgen pag. 477, De-Toui e 

 Levi Fl. Alg. Ven. III, p. 101. — Dcrbesice tenuissimce similis; 

 caespituiis plerumque 5-10 mm. altis, saturate viridibus; filamentis 

 flaccidis, 12-24 [j.. latis, irregulariter dichotomis et lateraliter ra- 

 mosis; ramis s?epe incurvis, patulis; zoogonidangiis piriformibus, 

 breviter pedicellatis, 100-130^50-70. 



Hab. in mari adriatico (Hauck) et sinu neapolitano (Berthold). 



7. Derbesia? furceliata (Zanard.) Ardiss. Phyc. Med. II, p. lOI, De- \m 

 Toni e Levi FI. Alg. Ven. III, p. 101, Bryopsis furcellaia Za- 

 nard. Saggio p. 60, Icon. phyc. adriat. I, p. 135, t. 32 A, Kuetz. 

 Tab. Phyc. VI, t. 71, f. 2, Hauck Meeresalgen pag. 475. — Cae- 

 spitoso-intricata, viridi-olivascens, 1-3 cm. alta; filamentis 50-120 



[J: latis, irregulariter dichotomo-fastigiatis, apicibus plerumque fur- 

 catis ; zoogonidangiis adhuc ignotis. 



Hab. in mari adriatico (Zanardini), in mari ligustico ad «Por- 

 tofino et Porto Maurizio» (Strafforello). 



8. Derbesia? marina (Lyngb.) Kjellm. Ishafv. Alg. Flora pag. 387, 1094 

 J. Ag. Till Algernes Systematik VIII, p. 34, Vaucheria marina 

 Lyngbye Hydrophyt. Dan. p. 79 A, tab. 22 nec alior. — Filamen- 



tis capillaribus, erectis, ramosis; ramis remotiusculis, attenuatis; 

 vesiculis (zoogonidangiis?) ovatis pedunculatisque. 



Hab. imprimis ad littora Faeroensia in infimo reflexus limite 

 (Lynoryr) in mari glaciali arctico (Kjellman). — Ca^^^pes erectus. 

 rupibus maritimis basi affixus, 2,5 cm. circiter longiis; filamenta 



