280 
159. 
160. 
161. 
162. 
163. 
164. 
165. 
166. 
MR. F. CURREY ON THE FRUCTIFICATION OF COMPOUND SPHÆRLÆ. 
Div. 12. CIrCINATÆ. 
S. (VALSA) PULCHELLA, Pers.; Fr. S. M. ii. p. 406. Tas. XLVIII. figs. 150-153, 
asci with sporidia, and (in fig. 152) free sporidia, X 325. Sporidia biseriate or 
crowded, colourless, slightly curved or nearly straight; normally uniseptate, but the 
septum sometimes not distinguishable; varying much in size, 0-0005 inch in length 
being about the average. The sporidia are sometimes rounded at the ends, some- 
times slightly acuminate. 
S. (VALSA) FURFURACEA, Fr. S. M. ii. p.409. Tas. XLVIII. fig. 154, sporidia, 
x 450. Sporidia colourless or pale green, uniseriate, 00008 inch long. 
S. (VALSA) CONVERGENS, Tode; Fr. S. M. ii. p. 410. Ta». XLVIII. fig. 155, fruit, 
x 325. Sporidia dark brown, subeymbiform but irregular in shape, frequently con- 
stricted in the middle; length variable. On Platanus occidentalis, the perithecia 
being under the bark so as not to be seen above, except by the undulations of the bark. 
I found that some of the perithecia produced, in lieu of the regular sporidia, numbers 
of the small diplodioid bodies shown in the figure, below the sporidia. One of the 
sporidia has commenced germination. 
S. (VALSA) HYPODERMIA, Fr. S. M. ii. p.407. Tas. XLVIII. fig. 156, asci with spori- 
dia, x 325. Sporidia colourless, granular, narrowly oblong, obtuse or slightly acu- 
minate at each end, sometimes with two or more large globose nuelei, biseriate. 
S. (VALSA) THELEBOLA, Fr. S. M. ii. p.408. Tas. XLVIII. figs. 157, 158, and 159, 
asci with sporidia, and free sporidia, x 325. Sporidia biseriate, greenish or colourless, 
slightly arcuate, obtuse at both ends ; usually with a cilium at each end, which is not 
visible whilst the sporidia are in the ascus. These cilia require care, to be rendered 
visible even when the sporidia are detached ; they are sometimes absent. Length of 
the sporidia and size of the asci variable, the sporidia sometimes reaching 0:0017 
inch. These figures show in a marked manner the difference in the appearance of 
the sporidia when the endochrome is oleaginous and refractive, and when it is 
granular. | 
S. (VALSA) XANTHOSTROMA (or CHRYSOSTROMA), Mont. Sylloge, p.221. Tas. XLVII. — 
fig. 160, ascus with sporidia, and free sporidia, x 350. Sporidia uniseriate or bise- — 
riate, more often the former, colourless or greenish, almond-shaped, pseudo-septate — 
from the division of the endochrome, 0-0007 inch long. Perithecia small, hardy — 
visible above the bark, but (like all the Circinatæ) very visible when the epidermis is 
stripped off. Easily known by its yellow stroma. Endochrome smooth and refractive. 
In another specimen of the same species I found the sporidia not septate, and reach- 
ing nearly 0:0009 inch in length. 
S. (Varsa) vesrira, Fr. S. M. ii. p.410. Tas, XLVIIL fig. 161, ascus with sporidia, 
X 425. Sporidia clear brown, multicellular, having transverse, longitudinal, and 
oblique septa, 0:0006 to 0:0009 inch long. As to the fructification of this species, 8 
my paper in the ‘Phil. Trans.’ 1857, above referred to. En. 
S. (DrPLoprA?) Meur, Fr. El. ii. p. 85. Tap. XLVIIL fig. 102, sporidia, x 325- 
Sporidia clear dark brown, some margined, some (not many) with a central nucleus, 
