370 Rev. M.J. Berkeley and Mr. C. E. Broome on British Fungi. 



have observed an additional sporidiolum in the centre. A peri- 

 thecium, though delicate, is decidedly present in this species. 



397. P. depressum, n. s. Tectum; quandoque pluriloculare 

 peritheciis spuriis valde depiessis supra stromate crassiusculo 

 olivaceo tectis ; sporis oblongo-ellipticis. On twigs of Rohinia 

 Pseudacacia, Batheaston, C. E. Broome, Feb. 1850; on elm. 

 King's ClifFe. 



Scattered, forming little pustules pierced by the orifice. Peri- 

 thecia much depressed, spurious, covered by an olive -coloured 

 stroma. Spores minute, oblong-elliptic, rather pointed at either 

 extremity, towards which there is a sporidiolum. Sometimes 

 there is more than a single cell, when the species approaches 

 Cytispora. This will probably form the nucleus of a distinct 

 genus. 



398. P. Samaroruniy Desm. ; Duby, Bot. Gall. p. 727 ; Desm. 

 Exs. no. 349. 1875. On Samari of ash, Batheaston, Jan. 1850, 

 C. E. Broome. 



Forming conspicuous black spots ; cuticle closely applied to 

 the perithecia. Perithecia convex, black, pierced in the centre. 

 Spores minute, oblong-elliptic, with a sporidiolum towards 

 either extremity. 



This is more conspicuous than several other species, and re- 

 sembles Sphceria clypeata. It occurs also on Ptelea trifoliata. 



399. P.piceum, n. s. Hypophyllum ; peritheciis spuriis piceis 

 convexis epidermide arete tectis ; sporis oblongo-ellipticis. On 

 the under surface of dead rose-leaves. King's ClifFe, Feb. 1850. 



Scattered; pustules conspicuous, convex, pitch-brown; cuticle 

 closely connected with the spurious perithecia ; spores pure white, 

 minute, oblong-elli])tic, with a sporidiolum at either extremity. 



Resembling Cytispora foliicola in appearance, but differing 

 greatly in structure. Ceuthospora concava^ Desm., which has the 

 same place of growth, is much larger. 



400. P. sticticum, n. s. Minimum ; peritheciis epidermide 

 denium longitudinaliter fissa obtectis ; sporis oblongo-ellipticis. 

 On dead twigs of box, Batheaston, C. E. Broome, Feb. 1850. 



Scattered, very minute, covered by the cuticle, which at length 

 splits lengthwise. Spores oblong-elliptic, with a sporidiolum at 

 either extremity. 



400*. P. exiguum, Desm. Exs. no. 1869. On shoots of elder, 

 Batheaston, C. E. Broome. 



Another small species grows on decorticated twigs with elliptic 

 or nearly globose dark spores, which we purpose calling P. Sam- 

 buci, but we have scarcely specimens enough to describe it pro- 

 perly. 



401. P. microscopicum, n. s. Peritheciis subglobosis sub epi- 



