Eu-Floridere, Rliodorneleae, OJonthalia. 113? 



tralem, discernere licet; stratum corticale circumcirca fere aeque 

 evolutum; in parte superiore frondis tenuioris stratum internum, 

 costse ad instar tenuioris, translucens cernitur. Axillse pinnularum 

 magis rotundatae quam in proximis. Color frondis exsiccatae nigre- 

 scens. Substantia firma. 



Odonthalia Lyallii (Harv.) J. Ag. Sp. II, 3, pag. 894, Rhodomela 1816 

 Lyallii Harv. Coll. Alg. N. W. Amer. Coast pag. 168. — Fronde 

 a basi plana, alterne decomposito-pinnatifida, costa subnulla aut 

 mox supra basin cvanescente, pinnulis in rachide lineari alternis 

 subulatis, inediis pinime in cystocarpia ovata subsessilia ecalcarata 

 racemose disposita abeuntibus. 



Hab. ad oras insulse « Vancouver » rejecta (4). Lyall). — 

 Frons 18-20 cm. longa, admodum regulariter decomposito-pinnata, 

 rachide 2 mm. circiter lata, pinnis superioris ordinis sensim an- 

 gustioribus, ultimis vix setam sequantibus latitudine. Pinnulae ul- 

 timi ordinis subulatae incurvse, 2 mm. longitudine superantes ; in- 

 feriores pinnae cujusvis vix transformatse et simpliciuscuke, medise 

 ad decompositionein pronoe aut in cystocarpia transmutatee, supre- 

 mae simpliciusculae et subulatse. Cystocarpia hoc modo in pinna 

 plura racemosa, brevissimo et crassiori pedicello insidentia, ovata, 

 ore parum incrassato et conspicuo superata, omnino ecalcarata, in- 

 feriora bene evoluta, superiora nodum referentia, demum forsan 

 evolvenda. Sectione transversali frons ex ancipite plana adparet, 

 nullam omnino incipientem costam monstrans; cellulse interiores 

 vix ullo conspicuo ordine dispositre, sensim extrorsum minores; 

 stratum corticale cellulis minoribus, endochromate colorato farctis, 

 contextum est. Apices pinnularum sunt obsoletius polysiphonii. Ob- 

 servante claro J. Agardhio, haec species est inter Od. corymbife- 

 ram et Od. aleuticam intermedia, fronde ad illam, cystocarpio- 

 rum dispositione ad hanc accedens. 



Odonthalia floccosa (Esp.) Falkenb. Rhodomelaceen (1901) p. G07, 1817 

 Fucus floccosus Esp. Icon. Fucor. II, p. 42, tab. 100, Turn. Hist. 

 Fuc. tab. 8, Rhodomela floccosa Ag. Sp. Alg. p. 376, Syst. p. 198, 

 Post. et Rupr. Illustr. p. 14, tab. XXXVIII, f. c (excl. syn.), Harv. 

 Nereis Bor. Amer. p. 24, .1. Ag. Sp. II, 3, p. 887, Fuscar/a floc- 

 cosa Rupr. Alg. Ochot. p. 33, Lophura floccosa Kuetz. Sp. p. 850, 

 (excl. syn.), Tab. Phyc. XV, t. 38, f. c-e, Fucus pilulifer Ttirn. 

 Hist. Fucor. tab. 236 (Fucus globulifer, in Indice, tom. IV) sec. 

 Ilupr. Alg. Ochot. p. 24, Spluvrococcus pilulifer Ag. Sp. p. 317, 

 Kuetz. Sp. p. 775, Rhodomela pilulifera Grev. in Harv. Nereis. 



