se in crusta quasi effiguratim aggregata, nec tamen connexa, 
 infus evacuata, primum convexa subrugosa, demum collapsa. 
Ascis clavatis, numerosis (016 mm. long.). Sporidiis line- 
aribus obtusis (004 x 0015 mm.) minutissimis, hyalinis. 
On leaves of Platanus. U. S. 
The use of reagents failed to detect any septum, but the 
sporidia were evidently immature and refused to leave the asci.. 
Sphaerella (Laestadia) faginea Cke. & Plow. in 
Plow. Sph. Brit. iii., No. 100.—Hypophylla, sparsa, puncti- 
formis. Peritheciis minutis, innatis, tectis, globosis, atris, 
Östiolis erumpentibus, Ascis clavatis. Sporidiis biseriatis, 
arcte ellipticis, utrinque obtusis, continuis, hyalinis (01— 011 
> ‘0025 mm.). 
On beech leaves. King’s Lynn. 
Sphaerella (Laestada) Buxi Fckl. Symb. Myc. 
100; Sphaeria Buxi, Desm. Ann. Sei. Nat., xix., 854.—Hy- 
en Peritheciis dense sparsis, minutis, subglobosis, 
rufo-olivaceis, pallidis in parenchymate folii nidulantibus, 
epidermide nigrifacta tectis, poro pertusis. Ascis clavatis, 
medio subinflatis; sporidiis oblongis, obtusis, 1—2 nucleatis, 
subhyalinis (.01—'011 x 0035 mm.). 
On dead leaves of Buxus. i 
Evidently Saccardo regards this as Mierothyriun micros- 
copicum (see Michelia, vol. i., p. 608), but there is an un- 
doubted Sphaeria on the specimens published by Desma- 
zieres, and we have collected and examined the same in 
the fresh state. No one who has done so could possibly 
eonfound the two. The Sphaerella has pale innate peri- 
thecia, covered with a darkened cuticle; the Microthyrium 
has peltate superficial perithecia. A section of the leaf may 
be cut with a little care, showing the perithecia imbedded 
in the leaf. Moreover, we have detected no septum in he 
sporidia. The radiating asci in Mierothyrium is an arrange- 
ment not met with in the Sphaerella. Hence it is evidently 
a too hasty assumption that the Sphaeria Buxi of Desma- 
zieres is Mierothyrium. In faet, if the eutiele be stripped from 
the leaf and submitted to the mieroscope this will be proved. 
Sphaerella (Laestadia) buxitolia Cke., sp. n.—Hypo- 
 phylla. Peritheciis exiguis, 2—4 in caespitulis minimis 
 eongestis, subprominulis, atro-fuscis, poro pertusis. Ascis 
 elavatis. Sporidüs sublanceolatis, utrinque obtusis, continuis, 
1—4 nucleatis, hyalinis (018 x "004 mm.). & 
On leaves of Buxus sempervirens, var. Himalensis from 
' Botanie Garden, Saharunpore, 1865. i 
This we regarded hitherto as a variety of Sphaeria 
_ Buxi, but further observation disproves this. The perithecia 
are more prominent, usually two to four together, of a 
