Sphaeriaceae, Hyalosporae, Ditopella. 451 



vibus, ostiolo obtuso, denique periderraium perforante ; ascis cla- 

 vatis, apice obtusis, brevissime stipitatis, polysporis; sporidiis te- 

 reti-oblongis, utriuque obtusiusculis, 3-4-nucleolatis, hyalinis. 



Hab. in ramis putridis Ulmi, Batheaston Britaaniae. — Ha- 

 bitu Cryptosporellce hypodermice affinis. Sporidia (ex icone) 12 

 V. plura in quovis asco, hinc diversa a Sph. farcia Plowr. Sph. 

 Brit. n. 68, quse Diaporthe. 



4. Ditopella Vizeana Sacc. et Sp. Mich. II, 248, F. it. t, 205. Nectria 1738 

 caulina Cooke Fung. Brit. Ser. II, n. 479. — Peritheciis grega- 

 riis, globoso-depressis, Y^-Vs niiH' dlam., epidermide ssepe cinera- 

 scente, dein fissa, velatis, uigris ; ostiolo exiguo obtuso ; perithe- 



cii contextu distincte parenchymatico, atro-fuligineo ; ascis cylin- 

 draceo-clavatis, breviuscule stipitatis, 110-115 =: 15-18, apice cras- 

 siuscule tunicatis, obtuseque rotundatis, aparaphysatis, polysporis ; 

 sporidiis (30-50) polystichis, fusoideis, utrinque obtusiusculis, re- 

 ctis V. leniter insequilateralibus, 15-18 ^ ^y^-SVa, pluriguttulatis v. 

 nubilosis e hyalino dilute olivaceis. 



Hab. in ramulisBuxi sempervirentis emortuis, Colfosco, 

 Ital. bor. (Spegazzini), Forden Britannise (Vize). 



5. Ditopella Hosackite (Cooke et Harkn.) Sacc. Sphcerella? Hosackice im 

 C et H. in Grevill. IX, p. 86. — Sparsa, tecta, punctiforrais ; pe- 

 ritheciis globoso-depressis; ascis clavatis, sessilibus, polysporis; 

 sporidiis circ. 16, ellipsoideis continuis, hyalinis, 6s2,5. 



Hab. in ramis Hosackise in California (Harkness). 



POLYTRICHIA Sacc. (Etym. polys, plures et thrix seta, ob perithe- 

 cia setosa). -— Perithecia subtecta, dein erumpentia, globulosa, co- 

 riacea, setis tortuosis obsita. Asci clavati, polyspori. Sporidia rai- 

 nuta continua, hyalina. — Genus mihi nondum observatura. fide 

 diagnoseos accuratissirai Montagnei (qui speciraina ex locis variis 

 a Lacroix, Mougeot et Wallroth accepit) conditum. 



1. Polytrichia Wallrothii Saicc. Sphceria polyiricha\\ siWr. Com]}. 794. mo 

 Mont.- Cell. Cent. VIII, p. 60 (ex specira. Lacroix, Mougeot et Wall- 



. roth). — Peritheciis innato-erurapentibus, y^ mill. diam., raajuscu- 

 lis nigris, vertice convexo epapillato, pilis tortuosis concoloribus 

 undique obsesso prorainulis, ovato-subrotundis, heraispha^ricis, in- 

 tus albo-farctis, ceraceis ; ascis clavatis maxirais, polysporis, 160- 

 200 i; 40; sporidiis minutis, continuis, hyalinis. 



Hab. ad culraos secalinos et triticeos putres, in Gerraa- 

 nia et Gallia. — Setae septata', fuliginece, 300 ;-»-. longse. Cl. Tulas- 



