108 
BRITISH SPH^EROPSIDEjE. 
Gen. 2. DISCULA, Sacc. Syll. ill., 674, 
Perithecia disc-shaped, or patellate, often imperfect, covered by 
the epidermis, which at length splits into teeth. Sporules ellip- 
soid or oblong, continuous, hyaline or slightly coloured. 
584. Discula platyspora (B. $ Br.), Sacc. Syll. 3565. 
On branches of Platanus. Batheaston. 
585. Discula microsperma ( B . fy Br.),Sacc. Syll. 3571. 
On twigs of Salix. 
586. Discula Desmazierii ( B . 8f Br.), Sacc. Syll. 3932. 
On branches of Tilia. Kew. 
Gen. 3. SFORONEMA, Besm. Sacc. Syll hi., 677. 
Perithecia covered by the epidermis, then erumpent, at first 
closed, at length splitting into numerous teeth. Nucleus discoid, 
rather soft. Sporules ovoid or cylindrical, continuous, hyaline. 
587. Spoironema phacidioides, Besm . Sacc. Syll. 3584. 
On leaves of M edicago. 
588. Sporonema obturata (Br.), Sacc. Syll. 3588. 
On ling. 
589. Sporonema strobilinum, Besm. Sacc. Syll. 3590. 
On fir and larch scales. Highgate (F. B. i., 341). 
Gen. 4. PSXLOSPORA, Babh. Sacc. Syll. in., 679. 
Perithecia innato-superficial, oblong or unequal, somewhat two- 
lipped, black, often densely gregarious, on living bark.- Sporules 
ellipsoid or oblong, continuous, hyaline. 
590. Psilospora faginea, Bab. Sacc. Syll. 3594. 
On bark of Fagus. Epping. 
591. Fsilospora quercus, Babh. Sacc. Syll. 3595. 
On oak bark. Lyndhurst ; Epping ; Leicester. 
Gen. 5. AMEROSPORIUM, Sacc. Syll. in., 680. 
Perithecia somewhat cup-shaped, setulose. Sporules cylindri- 
cally elliptical, not ciliate. 
592. Amerosporium congregatum (Cooke), Sacc. Syll. 3598. 
On Euphorbia sylvatica. Darenth. 
593. Amerosporium macrotrichum (B. Sc Br.), Sacc. Syll. 3602. 
On branches of Ulex. 
594. Amerosporium chaetostroma ( B . fy Br.), Sacc. Syll. 3604. 
On ash branches. Somerset. 
Gen. 6. DXNEMASPORIUM, Lev. Sacc. Syll. ill., 683. _ 
Perithecia cup-shaped, superficial, black, clad with rigid brown 
setse. Sporules oblong or sausage-shaped*, continuous, hyaline, 
ciliate at each end. 
595. Dinemasporium graminum, Lev. Sacc. Syll. 3610. 
On grasses. Forden ; Northamptonshire. 
596. Dinemasporium strigosum (Fr.), Sacc. Syll. 3611. 
On culms of grass. Appin. 
