16 



D ulmi Fr. Eudlow, November, 1841. 



D trifolii Ft. Westbury, Bristol, April. C. Bucknall. 



D Johnstoni^, and Br. Sandy Lane, May. C. Bucknall. 



D chsetomium Fr. Batlieaston, February, 1851. 



D graminis Fr, Derry Hill, winter. 



D brassicae Desm. Batlieaston, &c. 



GENUS 299. ISOTHEA.* Fr. 



Nucleus without any perithecium, coloured or black, covered by 

 the transformed substance of the matrix, or immersed in it. 

 Isothea pustula Berk. Batheaston, winter ; on oak leaves. 



GENUS 300. HYPOSPILA.t Fr. 



Perithecia globose, black, mouthlessj altogether innate, concealed 

 by the blackened substance of the leaves, and when that falls 

 away, splitting across. 



GENUS .301. stigmateaJ Fr. 



Parasitic. Perithecia globose, black, innate, slightly prominent. 

 Nucleus firm, at first mouthless, then bursting with a roundish 

 aperture. 



Stigmatea geranii Fr. Batheaston ; on various Geraniums. 

 S robertiani Fr. On Geranium robertianum. 



GENUS 302. oomyces§ B. and Br. 



Perithecia erect, contained in a polished, coloured sac, which is 



free above. Ostiola punctiform, apical. 



Oomyces carneo-albus. B. and Br. Sphseria Libert. On leaves 

 of Aira c?espitosa. Batheaston and Bowood, autumn and 

 spring. Ann. of Nat. Hist., No. 590. Libert excicc, No. 241. 



* Isothea, beautiful, 

 t Hypospila, from upo, beneath, and spllon, a stain. 



X Stigmatea, from stigma, a spot or mark. 

 § Oomyces, from Oon, an egg, and muke, a fungus. 



