— AM — 
7. PorvsieHow]A nxssOipES (6Go00d. el JJ oodw. 
Thallo basi 6-7-siphoneo pinnatim l. decomposito-pinnatim- 
ramoso, ramulis confervoideis multifidis. penicilliformibus ob- 
sesso, interstiliis infimis diametro longitudine aequalibus, su- 
perioribus eodem duplo 1. triplo longioribus, sporocarpiis in 
penicilliformibus. 
Fucus byssoides Good. ct PF oodw. in Linn. Trans. 5 p. 229 
( 43.) 
Hutchinsia byssoides 44g. Syn. p G0. — Lynsgb. Hydr. p. 110 
t. oA B. C. 
Polysiphonia byssoides Grev. — 4g. Scand. exs. n. 10. 
In fundo petroso 5-12-orgyali cum extra- tum — intrataeni- 
ensi, a Freto baltico per. totam oram Scandinaviae occidenta- 
lem saltim usque ad Bergen (Roren) frequentissima; at neque 
ad Molde neque ad Christiansund mihi obvia. Aestate tota. 
Thallo usque pedalis, in recenti statu roseus l. plus mi- 
nus purpurascens, exsiccalus coloris nigrescentis. ami infe- 
riores longiores, versus apicem thalli longitudine decrescentes, 
ad unumquodque geniculum pro more exeuntes, Ramuli penicilli- 
formes alternatim distichi, in fila confervoidea soluta, cellulis dia 
metro triplo saltim longioribus, multifida. Sporocarpia subsphaerica. 
8. PorvsiruowiA rAsTIGIATA, fq. 
Thallo basi multisiphoneo vix attenuato dichotomo fastigi- 
ato, interstitiis diametro duplo l. triplo brevioribus, sporocarpiis 
lerminalibus ovatis. 
lucus lanosus Linn. Syst. ed. 12 v. 2 p. 718. 
Conferva polymorpha FL Dan. — JY'ahlenb. Lapp. p. 951. 
Hutcehinsia fastigiata Ag. Syn. p. 55. — Lyngb. Hydr. p. 
108 (55. 4. 
