422 HELMINTHOCLADE^E. Scinaia. 



Slruclura frond is ct fructus genus a Halymcniu longius recedit, 

 i;t revcra fructus consiiuillima structura Ncmalioni aflinitate proxi- 

 mum, licet periplierieo strato in in em bran a in collnlosain coalcsconte 

 baud parum differat. Speciem altcram, affinitatc mibi valde diibiam, 

 duce luitxingio, adjcci. 



1. Sc. FURCELLATA (Turn, in Schr. Journ. 18002 p. 301) froiulc 

 cylindrica, a-quali aut attenuato-constricla, dichotonio-fastigiata, 

 gelatinoso-membranacea. 



Ulva furcellata Turn. I. c. cum icone. Engl. Dot. tab. 1881. 



Scin. forcellata Bivon. I. c. 



Ginannia furcellata Mont. mscr. Fl. Alycr. p. 111! Nolans in Farl. 

 Giorn. Hot. I. p. 311. Harv. Phyc. tab. LA/A'/ Alg. Tasm. n. 71! Kiilz. 

 Sp. p. 713! 



Holymenia furcellata Ag. Sp. I. p. 212! Grev. Aty. Brit. p. 163! Harv. 

 Man. p. 52! ./. Ag. Alg. med. p. 08. Hook, el Harv. in Land. Journ. IV. 

 p. 548! 



Ulva interrupta Pair. 



Dumontia interrupta Lam. did. d'Hist. Nal. cum icone!! 



Dumontia triquetra Lamoiu. Ess. p. io!! 



Fucus pseudocrispus Clem. Ens. p. 3II! 



Fucus Stackhousi Clem. Ens. p. 312? 



Fucus Succosus Schousb.! 



Sehestedtia humilis Schousb. \ 



Exs. Wyalt Danm. n:o 79 ! 



Var. fi. undulaia frondis membrana unduluto-collapsa. 



Halymenia undulata J. Ag. mscr. 



Ginannia undulata Mont. Bonile p. 50 tali. Ho fig. 3. 



Var. y. subcoslata frondo latiori cvidontius costuta, bic illic con- 

 slricta. 

 Hal. furcellata var. subcostata /. Ag. Alg. mcd. p. 98. Harv. P/tyc. I. c. 



Ilab. in occano allantico a Helgolandia! usque ad Tingin!; in 

 maii adriatico (Hiasolelto!); in oceano australi ad Cop. b. Spni 

 'J'asinaniam et Nov. Xelandiam (Harvey); var. ( V. in oceano pacilico 

 ad liltora Chilensia (lib. Hinder!) et insiilas Sandwich (Harvey). 



Cicspes subliemispluEricus, 2 6-pollicaris. Frondes crussitic pcnnam 

 culumbinain vel usque anserinam a3quantes, aliquando crassiores, cylin- 

 dracca: aut subcompress.T, .Tquoles nut sparsim attepuato-constridtfie, stri- 

 cturym versus longius aut brevius attenuala 1 , segincntis novis a strictura 

 >;ri>u pullulantibus, dichotomo-fastigiatae, axillis patepiibus acutiusculis. 

 Si'-iui'iiln sulijcqiie crassa, superiora aliquando paulo crassiora, exsicca- 

 lione iilcruininic magis quam inferiora collabonlia et formam lingulatam 



