458 Pha?ozoospoi'inae, DesmaresUace£e, Desmarostin. 



4 milliin. attingente. Apices denudati chordiformes pinnarura habi- 

 tum proprium et characterem insignem plantos tribuunt. Pinnae 

 in parte inferiore 3-4 cm. distantes, tri-quadripinnatce. Pinnulae 

 juveniles inferiores circiter 2.5 cm. longas, a basi eximie attenuata 

 lineares, versus apicem iterum attenuatie; superiores et adultiores 

 a basi subsequali compressa elongato-lineares, 4-7 cm. long?e (et 

 forsan longiores) apice obtusiore abruptius attenuato. Color in ex- 

 siccata juvenili virescens, in senili fuscescens et fere nigricans. 

 Forsan huc pertinet, saltem sec. descriptionem ab illustri J. Agardh 

 allatam, Besmarestia Menziesii in J. Ag. Sp. I, p. 165 sequenti 

 modo descripta, cui speciei referuntur ut synonyma Sporochnus 

 Menziesii Ag. herb. (1833), Trinitaria conferi-oides Bory Voy, 

 Coq. p. 216, t. 24, f. 2, Desmarestia viridis var. distans Hook. 

 et Harv. Crypt. antarct. p. 160 : fronde filiformi e tereti compres- 

 sa, coriaceo-cartilaginea , costa immersa percursa, decomposite di- 

 stiche pinnata, pinnis oppositis, a basi teretiuscula compressis li- 

 neari-filiformibus, ultimis elongatis, alternis inermibus. In oceano 

 Australi ad oras Novte Shetlandia^ (Menzies) et ad « Conception » 

 (Bory). 



4. Desmarestia Rossii Hook. et Harv. Alg. Antarct. p. 249, Cr. Ant- 7(32 

 arct. p. 161, tab. 172-173, Kuetz. Sp. p. 571, Tab. Phyc. IX, t. 98, 

 fig. a-b, J. Ag. Sp. I, p. 167. — Gigantea, fronde compressa, an- 

 guste lineari, coriaceo-cartilaginea, costa immersa percursa, decom- 

 posito distiche pinnata, pinnis pinnulisque oppositis, ultimis utrin- 

 que attenuatis, acutis, erectis vel ultimis adpressis, margine inte- 

 gerrimis. 



Hah. in oceano Australi ad insulas Maluinas et Caput « Horn » 

 (Hooker). — Frondes 4-8-pedales, circumscriptione lanceolatae, in 

 media parte tripinnatte, basi apiceque bipinnat?e. Caulis diametro 

 4-7 mm., coriaceus, e tereti compressus, costa immersa percursus, 

 distantiis pollicaribus per totam longitudinem pinnis distichis e 

 margine egredientibus, regulariter oppositis obsitus. Pinn?e con- 

 formes erecto-patentes, sinu acuto. Pinnulaj ultimge semipollicem 

 longge aut breviores, millimetrum vix lata?, utrinque eximie atte- 

 nuata?, iicutne, integerrimge. Formam angustam D. ligulatce potissi- 

 mum ji^mulatur sec. ipsos Hooker et Harvey sed eorum species 

 textura multo firmiore pnedita cst. 



5. Desmarestia aculeata (L.) I.amour. Ess. p. 25, Grev. Alg. Brit. 703 

 p. 38, t. 5, f. 2-3, Harv. Phyc. Brit. t. 49, Kuetz. Phyc. gener. 



p. 343, t. 26, I, Sp. p. 571, Tab. Phyc. IX, t. 94, J. Ag. Sp. I, 



