CENANGIU1I. 319 



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 — 3/x. 



Spermogonia in the form of minute depressed 

 tubercles, discharging by an apical pore the filiform - 

 ianceolate spermatia, which are curved, and about 

 15 fi 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/x long. 



Cenangium seriatum — Fries, " Sys. Myco.," ii. p. 185 ; 

 Duby, "Bot. Gall.," p. 736, No. 10. Peziza truncattda 

 — Rebent., " Neom.," p. 383. Dermatea seriata — Tul., 

 " Select Fung. Carp.," vol. iii. p. 160. 



Exs. — Mazerio, " Crypt. Gall.," ed. i. fasc. viii. (1829), 

 No. 384 ; Lev. in Moug., " Stirp. Crypt.," iasc. xv. (I860), 

 No. 1479. 



On Betula alba. 



The transverse cracks in the bark expose the linear 

 series (J to 1 inch long) composed of the three forms, the 

 ascigerous cups being rarest. Tulasne gives the sporidia 

 as 35 — 45 x 3 — 4/x ; 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 

 growth. 



Ox lord ! (Mr. Baxter). 



D. SPORIDIA CLAVATE. 



8. Cenangium Ribis. Fries. 



Csespitose, 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 



