264 MR. F. CURREY ON THE FRUCTIFICATION OF COMPOUND SPHÆRIÆ. 
16. S. (XYLARIA) HYPOXYLON, Linn.; Fr. S. M. p. 327. Tas. XLV. fig. 17, ascus and 
sporidia, X 325. Sporidia uniseriate, dark brown, elliptico-acuminate, but often 
subeymbiform, 0-0004 inch long, usually with two nuclei, BOM with one, 
17. S. (XYLARIA) MICROCERAS, Mont. Tas. XLV. fig. 18, ascus with sporidia, x 325, 
Sporidia uniseriate, brown, elliptical, rather irregular, 0:0004 inch long. 
18. S. (XYLARIA) MULTIPLEX, Kze. Linn. vol. v. p. 536. Tas. XLV. fig. 19, ascus with 
sporidia, x 325. Sporidia uniseriate, dark brown, plano-convex or irregular elliptical 
0:0004 inch long. | 
19. S. (XYLARIA) CORNIFORMIS, Mont. Tas. XLV. fig. 20, ascus with sporidia, X 325. 
This plant is marked in Hook. Herb. * Hypoxylon corniforme, an Sphæria corniformis, 
Fr." The sporidia are uniseriate, almond-shaped, double- or plano-convex, rather dark 
brown, 00004 inch long. In fig. 21 I have drawn an ascus with sporidia (x 325) of 
S. corniformis, Fr. The sporidia are considerably larger than the above, and are 
furnished with one or two nuclei in each. There are many species, however, in which 
the size of the sporidia varies even to as great an extent as is shown in the difference 
between figs. 20 and 21; and the existence or non-existence of nuclei depends upon 
age and other circumstances to such an extent that they afford no safe characteristic, 
I think S. corniformis, Fr. and Hypoxylon corniforme, Mont., must be the same. Mr. 
Berkeley thinks they may possibly be distinct, the former being European, the latter 
tropical. Dr. Montagne's plant is rather a Xylaria than a Hypoxylon. 
20. S. (XYLARIA) IANTHINO-VELUTINA, Mont. Syll p. 204. Tan. XLV. fig. 22, sporidia, 
X 225. Sporidia uniseriate (I think, but there were no perfect asci), brown, irregularly . 
almond-shaped or pyriform, 0:0005 long. The perithecia are rather larger, with.vel- 
vety hair between them. 
21. S. (XYLARIA) CARPOPHILA, Pers. ; Fr. S. M. ii. p.328. Tap. XLV. fig. 23, ascus with 
sporidia, x 325. Sporidia uniseriate, clear, light brown, elliptical or slightly reni- 
form, with one or two nuclei, 0:0004 inch long. 
22. S. (CoRDYCEPS) ALUTACEA, Pers. The fructification of this plant is not distinguish- 
able from that of S. rufa (see post). It is a-Oordyceps with the fructification of : T 
Hypocrea. 
23. S. (HYPOXYLON) saGRÆANA, Mont. Tan. XLV. fig. 24, sporidia, x 450. Sporida — 
obtusely elliptical, sometimes slightly incurved in the middle, clear (rather dark) 2 
brown, obtuse or almost square at the ends, 0-0004 inch long. | ee 
24. 8. (Corpycers) PURPUREA, Fr. Ta». XLV. fig. 25 a, ascus with sporidia, X 325; b ta 
free sporidia more highly magnified. Sporidia colourless, filiform, attenuated at each — 
_ end, variable in length, 0:002 to 0-008 long, or even more. It is difficult to count the — 
sporidia, but I should guess them at eight; I found them always entirely filling vd 
ascus, which is very long and narrow, and in my specimens not so clavate as the — 
figures in the Micrographic Dictionary, which are reduced from Tulasne's figures m 
the ‘Ann. des Sciences.”—This and the following plant are placed in a distinct genus — - 
(Cavicens) by Tulasne. They differ altogether in fructification from the moniliform 2 à 
fruit of Cordyceps. E 
25. 8. (CogpvcE»s) MICROCEPHALA, Tul. The fruit in my specimens differs in no respect | ; 
