894 Pyrenomycetese, Sphaeriaceae, Dictyosporfe, Clathrospora. 



loculo uno binisve longit. divisis, 16-25^4,5-6, chlorino-hyalinis, 

 strato inucoso crasso (intra ascum) obvolutis. 



Hab. in foliis Psammae arenariae, Ostende Belgii. 



74. Pleospora Vogliniana Sacc. in Rev. Myc. 1885, tab. LV, fig. 3. 3620 

 — Peritheciis subsparsis, peridermio dealbato tectis, globoso-de- 

 pressis, '/4 mm. diam., dein leniter emergentibus. ostiolo inconspi- 

 cuo; ascis tereti-clavatis, breve distichis, oblongo-fusoideis, 5-se- 

 ptato-muriformibus, ad septa leniter constrictis, 14-18-7, hyalinis. 



Hab. in cortice Betulae albse circa Lutetiam Galliae (Fbuil- 

 LEAUBOis). — Habitus lichenoideus. 



75. Pleospora argyrospora Harkn. New Calif. Fungi pag. 25. — 3621 

 Peritheciis minutis, nigris, erumpentibus, sparsis; ascis 8-sporis, 

 clavatis, sessilibus, crasse tunicatis, 60-65^:20; paraphysibus fili- 

 formibus; sporidiis hyalinis, distichis, elliptico-lanceolatis, 3-septa- 



tis, septis 1-2 longitudinalibus, 18 s 8. 



Hab. in ramis emortuis Dendromeci rigidi, Tanialpais in 

 California. 



CLATHROSPORA Rabonh. in Hedw. 1852, p. 116, em. Berl. Monogr. 

 Pleosp. p. 194 (Etym. clathron claustrum). — Perithecia et asci 

 Pleosporce. Sporidia quidem Pleosporce sed conspicue compresso- 

 applanata. — Ad lioc genus spectant: C. permunda (Cooke) Berl. 

 loc. cit. (Syll. II, p. 243) [= PL baccata EII., Pl. aurea EII. et 

 Pl. compressa Hark. teste Berl.], C. plalyspora (Sacc.) Berl. 1. c. 

 (Syll. II, p. 264), C. pyrenophoroides (Sacc.) Berl. I. c. (Syli. 11, 

 p. 267), G. Donacis Berl. I. c, C. punctiformis (Niessl) Berl. I. c. 

 (Syll. II, p. 271), C. Elynm Rabenh. (Syll. II. p. 273) et sequentes: 



1. Clatlirospora planispora (Ell.) Berl. loc cit., Pleospora planispora 3622 

 Ell. in Torr. bot. Club. 1883, p. 53. — Peritheciis gregariis, sic- 

 citate collapsis, 250-330 //. diam., epidermide vix decolorata tectis; 

 ascis 114-120 iT 25-28 ; sporidii."5 distichis, oblongo-ellipsoideis, ap- 

 planatis, 5-septatis, loculis extimis septo longitudinali praeditis, lu- 

 teis, demum brunneis, 30-40 ^j 15-20 e latere 11 y.. crassis; para- 

 physibus copiosis. 



Hab. in culmis putrescentibus verisimiliter Elymi, in Ameri- 

 ca boreali. — Affinis P. aurea^, a qua raycelio non abundante, spo- 

 ridiis latioribus, constanter 5-septatis distinguenda. 



2. Clathrospora Passerinlana Berl. Monogr. Pleosp. Clathr. et Pyr. 3623 

 pag. 199, t. IX. f. 4. -— Peritheciis sparsis, minutis, 200-250 //. 

 diara., globoso-conoideis v. globoso-depressis, ostiolo minuto, ob- 



