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. K. 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 Spheria clypeata. It occurs also on Ptelea trifoliata. 
899. P.piceum,n.s. Hypophyllum ; peritheciis spuriis piceis 
convexis epidermide arcte 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 differmg 
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- 
