CENANGIUM. 349 
in a linear series from a thin black stroma; asci broadly 
clavate ; sporidia 8, linear-lanceolate, acute at the ends, 
straight or curved, pseudo-multiseptate, 55—85 x 2—3y. 
Spermogonia in the form of minute depressed 
tubercles, discharging by an apical pore the filiform- 
lanceolate spermatia, which are curved, and about 
15u long. Pycnidia minute, slenderly conical, discharg- 
ing by a minute apical pore the linear-lanceolate 
stylospores, which are acute at the ends, curved, and 
about 30 long. 
Cenangium seriatum—Fries, “Sys. Myco.,” ii. p. 185; 
Duby, “Bot. Gall,” p. 736, No. 10. Peziza truncatula 
—Rebent., “Neom.,” p. 383. Dermatea seriata—Tul., 
“Select Fung. Carp.,” vol. iii. p. 160. 
Exs.—Mazerio, “Crypt. Gall.,” ed. i. fase. viii. (1829), 
No. 884; Lev. in Moug., “Stirp. Crypt.,” fase. xv. (1860), 
No. 1479. 
On Betula alba. 
The transverse cracks in the bark expose the linear 
series (4 to 1 inch long) composed of the three forms, the 
ascigerous cups being rarest. Tulasne gives the sporidia 
as 85—45 x 3—4u; but in the Oxford specimen they 
are as given above. He says that long before the fruit 
can appear the linear series changes the natural colour 
of the white parchment-like bark to brown, and that 
underneath each (sorus) is a black linear ovate zone in 
the wood. 
Name—Series, an order, a row; from the mode of 
rowth. ' : 
Oxtord ! (Mr. Baxter). 
D. SPORIDIA CLAVATE. 
8. Cenangium Ribis. Fries. 
Ceespitose, at first spherical, then turbinate; stems 
connate, arising from a stroma-like tubercle, blackish- 
brown, nearly naked, at first closed, then opening with a 
fimbriate, connivent margin ; hymenium pale cinereous ; 
asci cylindrical, narrowed to an elongated base; sporidia 
