Kev. M. J. Berkeley and ]\Ir. C. E. Broome on British Fungi. 361 



divided ; heads small, composed of subdicliotomous threads con- 

 sisting of oblong sublinear spores about 0'0002 inch long. 



Graphium tenuissimuvi, Corda, and Periconia chlorocephala , 

 Fries, belong evidently to the same genus. It is to be observed 

 that in H. delicatum the Hocci, when squeezed, often split longi- 

 tudinally, though they are not in the slightest degree com- 

 pound. 



Plate IX. fig. 4. Plant magnified. 



819. Monotospora sphoirocephala, n. s. Stratum cfifusum 

 nigerrimum ; floccis simplieibus, sporis globosis Ipevibus. 



On a dead stump. Batheaston, Dec. 1858. 



Forming a dense black stratum ; flocci black, moderately 

 thick, with two or three septa ; spores globose, terminal, even, 

 •001 inch in diameter, sometimes seated on a swollen base. 



This is very near Monotospora megalospora, B. & B., but the 

 spores are globose, not obovate, and smaller. 

 Plate IX. fig. 6. Plant magnified. 



820. Dendnjphium comosum, Wallr. Fl, Crypt, vol. ii. p. 300; 

 Cord. i. p. 21, fig. 279. 



On dead nettle stems. Batheaston, December 1858, C, E. B. 

 The base of the flocci is sometimes sheathed, as in the genus 

 Sporochisma. 



821. O'idium (xquivocum, Berk. & Br. ; Torula cequivoca, Cord. 

 Fasc. 2. tab. 9. f. 37. On Polyporus Schweinitzii. Dorsetshire, 

 Kev. J. H. Austen. 



Our plant seems to be precisely that of Corda, which was 

 developed on the spores of Sclenosporium Hippocasta^ii, of which 

 he was observing the germination. 



821*. Psihnia nivea, Fr. Syst. vol. iii. p. 450. 



On the bark of a beech-tree. Brington, Huntingdonshire, 

 P. Fernie, Esq. 



Remarkable for its curled flocci, which sometimes resemble 

 unrolled spiral vessels. 



822. Arthrobotri/um atrum, n. s. Stipite brevi ; sporis magnis 

 apicibus hyalinis ; articulis insequalibus. 



On dead nettle stems. Batheaston, Dec. 1858, C. E. B. 



Minute. Stem short, composed of simple articulated threads, 

 which are swollen above, and terminate in subelliptic, very ob- 

 tuse, unequally-articulated spores, which are dark in the centre 

 and hyahne at the extremities, •001-*0015 inch long, exclusive 

 of the swollen base. 



This very beautiful plant is evidently congeneric with A. stil- 

 boideum, Cesati, figured, but not described, in ' Hedwigia,^ and is 

 readily distinguished by the much larger spores. 



Plate IX. fig. 6. a. Plant magnified ; b. spores and threads more 

 highly magnified. 



