280 MR. F. CURREY ON THE FRUCTIFICATION OF COMPOUND SPHtERI^. 



Div. 12. ClRCINAT^. 



159. S. (Vaisa) pulchella, Pers. ; Fr. S. M. ii. p. 406. Tab. XLVIII. figs. 160-153, 

 asci with sporiclia, and (in fig. 152) free sporidia, X 325. Sporidia biseriate or 

 crowded, colom-less, slightly curved or nearly straight ; normally uniseptate, but the 

 septum sometimes not distinguishable ; varying much in size, O'OOOS inch in length 

 being about the average. The sporidia are sometimes rounded at the ends, some- 

 times slightly acuminate. 



160. 8. (Vaisa) FUnruBACEA, Fr. S. M. ii. p. 409. Tab. XLVIII. fig. 154, sporidia, 

 X 450. Sporidia colourless or pale green, uniseriate, 0*0008 inch long. 



161. S. (Valsa) convergexs, Tode ; Er. S. M. ii. p. 410. Tab. XLVIII. fig. 155, fruit, 

 X 325. Sporidia dark bi-own, subcymbiform but irregular in shape, frequently con- 

 stricted in the middle ; length variable. On Platcmus 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. 



162. S. (Valsa) hypodermia, Fr. S. M. ii. p. 407. Tab. XLVIII. fig. 156, asci with spori- 

 dia, X 325. Sporidia coloiirless, granular, narrowly oblong, obtuse or slightly acu- 

 minate at each end, sometimes with two or more large globose nuclei, biseriate. 



163. S. (Valsa) thelebola, Fr. S. M. ii. p. 408. Tab. 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 cUiuni at each end, which is not 

 visible whilst the sporidia are in the ascus. These cUia 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 diiference in the appearance of 

 the sporidia when the endochrome is oleaginous and refractive, and when it is 

 granular. 



161. S. (Valsa) xamthostroma (or chrysostroma), Mont. SyUoge, p. 221. Tab. XLVIII. 

 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, 00007 inch long. Perithecia smaU, hardly 

 visible above the bark, but (like aU the Circinatse) very visible when the epidermis is 

 stripped off. Easily known hy its yellow stroma. Endochrome smooth and refi'active. 

 In another specimen of the same species I found the sporidia not septate, and reach- 

 ing nearly 0'0009 inch in length. 



165. S. (Valsa) vestita, Fr. S. M. ii. p. 410. Tab. XLVIII. fig. 161, ascus mth 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, see 

 my paper in the 'Phil. Trans.' 1857, above referred to. 



160. S. (DiPLODiA ?) Meli^, Fr. El. ii. p. 85. Tab. XLVIII. fig. 162, sporidia, x 325. 

 Sporidia clear dark brown, some margined, some (not many) with a central nucleus, 



