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 depressis supra stromate crassiusculo 

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

 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. Samarorum, 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 Spharia 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-elliptic, 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 

 demum 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- 



