424 



Sobtribus I. PanctftrieAe *. 



Char. ess. Monoclines. — Thalamia ab ipsa origine 

 nnda; asci monospori. — Thallus laminaris solidns. Fnlcrum 

 radicale nudum. 



Gen. I, Diplostromium Kiitz. 



Char* Thallns laminaris stipitatus, simplex y planus? so- 

 lidus, contimms, temiissime membranaceus, Fulcrnm radicate 

 discoideum ramntissinmra , uudam. Trichophyses rarissimae. 

 Structura cellulosa, arcta. Stratum corticate nullnm. Stratum 

 medullare e cellulis aequalibns subparallelipipedis coelococco- 

 deis distromaticis composhum. 



Thalamia vix defimta, punctiformia , minntissima , nuda, 

 per omuem thallum inordinate sparsa, ex ascis simplicibns, 

 sphaerico - ovatis s sessUibns, monosporis, erectis, paraphysi- 

 bus simplicJbus clavatis articnlatis snbradiantibus paucissimis 

 qonconutatbj composite — Gonophyses nnllae* 



Oedogonia ignota* 



1. Biplostromlnm tenulssimum Kiitz. (Phycol. gener. 

 p. 298. t, 20. II. fig. i et 3. ceteris omnibus exclusis.) 



Punctaria tenuissima GreTiIl., Menegh. (Alg. Ital. e 

 Balm. p. 179.) — Zonaria tenuisaima Agardh (System.). — 

 Z. plantaginca var. tenuior Agardh (Spec). — Ulvapten- 

 taginifoHa var. tenuior Lyngb. 



Hah, Mare Baltieum, boreale, adriaticum. 



Obs. Figarae 2, 4, 5, 6, 7, 8, iconis 20. II. Diplostro- 

 mii tenuissimi Kutz. ad Heterophycum baltieum Trevi*. 

 (Sopra un nuovo gen. Meneghinia di Algne Imenotall. — 

 Saggio di nna xnonogr. delle Alghe Coccotall. p. 101.) V**' 

 ttnent. 



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