Eu-Floridete, Rhodoineleae, Odont^ulia. 1111 



cello suffulta, lineari-lanceolata, ad geniculum quodquc leviter con- 

 tracta, duplicem sericni tetrasporangiorum foventia, nempc in sin- 

 gulis artieulis tetrasporangia 2 opposita generantia. Cystoearpia ad 

 apices pinnarum corymbosa, infra apicem pinnulae oblique eidem 

 insidentia ejusque apice calcarata, urceolato-oyata, ore fere contra- 

 cto. In frondis inferioris sectione ftransversali ex ancipite-plana 

 sipbo centralis vix dignoscitur; cellulae jpericentrales in 2-0 series 

 cellularuni inter margines extensne adparent stratique corticalis 

 cellulae ad medium unius pagime prolongata?, costam formantes. 

 Color fuscescens. Substantia meinbranacea. 



7. Odonthalia semicostata (Mert.)' J. Ag. Sp. II. 3. p. 898, Fucms se- 1821 

 micostatus Mert. mser., Rhodomela corymbifera Ag. Sp. p. 371 

 (excl. synon. Fuco corymbifero Grmel,)j Odonlhalia corymbifera 

 <lrev. Syn. p. L,-Kuetz. Sp. p. 817, Odonthalia angustifoiia Suhr 

 Beitr. in Flora 1839, p. 7.1, t. IV. — Fronde plana , alterne et distiche 

 decomposito-pinnata, inferne caulescente incrassata, dein costata, 

 costa llexuosa racbidem alterne excisam oblique peiicurrerite, su- 

 .perne evanescente, pinnulis dentiformi-subulatis ; stichidiis in ra- 

 niulo brevi supraaxillari subfasciculato-pinnatis, torulosis; cysto- 

 carpiis ad apices pinnarum dense oorymbosis, in pihna abbrey.iata 

 verrucosa subpedicellatis, urceolatis, margine inaequalibus. 



Hab. in oceano Pacifico septentrionali ad oras Camciatcae (Mer- 

 tens). — Dubitat clarus J. Agardli, utrum ha3c sit planta junior 

 Odonthalice camtschaticce, an species diversa. Specimina. quae 

 phycologus suecieus scrutatus est, sunt tenuioris substan.tiae et fere 

 membranacea, exsiccatione fuscescentia potius quam nigrescentia, 

 costa in superiore parte nulla conspicua. In axilla pinnuLTe minutae 

 provcniunt. in quibus tetrasporangia demum evoluta fore, qualia 

 quoque pingit Suhr, verisimile videtur. Cystocarpia ab iis Odon- 

 thalice camtschaticce sat diversa; proveniunt nimirum inapicibus 

 corymbosis pinnarum, in rachidibus contractis et fere verrucosis 

 subsingula, at ob rachides numerosas aggregata, quamin Odou- 

 thalia camtschatica multo minora, subdisiinctQ pedieelio iriSiden- 

 ti;i et vix proprie calcarata, urCeolata, infra carpostomium verruco- 

 so inaequale parum contracta, carposporas rite evolutas foventia. 

 Qua quidem cystojcarpiorum dispositione ab Odonthalia camtscha- 

 tica valde abludit, nisi, suspicante claro J. Agardh, ramulos fru- 

 ctiferos Odonthalice semicostatce sensiin prolongarj et dispositio- 

 nein Odonthalice camtschaticce d.ein oriri credere liceretj 



8. Odonthalia dentata (L.) Lyngb. Hydr. Dan. p. 9, t. 3, Grev. Alg. 1822 



