OF BRITISH FUNGI. 157 



303. Stroma effused, crustaceous. Perithecia im- 

 mersed, shortly papillate, paraphyses few. Spo- 

 ridia small, cylindrical, curved, pale-coloured. 



Stictospileria, Tul. 



309. Stroma fused with the matrix. Perithecia im- 



mersed, sometimes in the matrix, papillate, 

 paraphyses few. Sporidia clustered, linear and 

 curved, or ovate and straight, simple, pale. 



EUTTPA, Tul. 



310. Perithecia none. Nucleus immersed in the 



stroma. Ostiolum papillate. Sporidia simple 

 or septate. Dothidea, Fr. 



311. Epiphyllous. Perithecia globose, immersed in 



a fleshy stroma. Sporidia ovate, simple. 



POLTSTIGMA, P. 



312. Stroma globose, depressed, cellular. Perithecia 



immersed, adnate. Sporidia fusiform, four to 

 six-celled, pale. Meloguamma, De JSFot. 



Section II — Vulsei. 



313. Stroma determinate, verruciform. Perithecia 



immersed in the stroma. Sporidia small, 

 spermatoid, hyaline. Diatrype, Fr. 



Sub-Gen. 1. Ai-ci many-spored. — Diatrypella. 

 ,, 2. Asci eight-spored. — Diatrype. 



314. Stroma determinate, verruciform. Sporidia two 



to four-celled, hyaline. Mamiania, Be Not. 



315. Perithecia circulating, rostrate, ending in a com- 



mon disc. Sporidia hyaline. Valsa, Fr. 



Sub-Gen. 1. Sporidia spermatoid, hyaline. — Valsa. De Not. 

 ,, 2. Sporidia bilocular. — Valsaria. De Not. 

 ,, 8. Sporidia plurilocular. — Pseudovalsa. De Not. 



