205 



ously compressed and finally regularly perforated or subrimose. 



On dead decorticated trunks of Syringa, Bethlehem, Pa. (Schw.) 



A. aquatica, (E. & E.) 



Sphceria aquatica, E. & E. Bull. Torr. Bot. Club, XI, p. 42. 

 Amphisphceria aquatica, Sacc. Syll. 6617, Cke. Syn. 3450. 



Perithecia scattered, membranaceous, buried or suberumpent, 

 250 jut diam., subglobose or slightly elongated, with a papilliform 

 ostiolum. Asci narrow-cylindrical, 150 x 8-10 t a, with abundant par- 

 aphyses. Sporidia uniseriate, oblong, uniseptate and slightly con- 

 stricted at the septum, straight or slightly curved, pale at first with a 

 single large nucleus in each cell, at length dark brown, 15-20x 6-7 //. 



Inside a cedar water-pail in constant use, Newfield, N. J., 1883. 



A. Langloisii, E. & E. in Herb. 



Perithecia gregarious, hemispherical, 1 mm. diam., base sunk in 

 the wood, black, roughish, thin and brittle. Ostiolum prominent, stout, 

 tuberculo-conical, obtuse and at length perforated. Asci clavate-cylin- 

 drical, p. sp. 100-125x15-20 ju, with filiform paraphyses. Sporidia 

 overlapping-uniseriate, or biseriate above, fusoid-oblong, uniseptate 

 and subconstricted, brown, sub inequilateral, 30-40 x 10-12 /a. 



On a decaying log of Garya (?), Louisiana (Langlois 2171). 



The perithecia resemble those of A. umbrina, but the sporidia 

 are much larger. 



A. Platani, E. & E. i n Herb.) 



Perithecia scattered, convex, hemispherical, about \ mm. diam.. 

 covered by the slightly blackened epidermis which is pierced by the 

 tuberculo-papilliform ostiolum. Asci stipitate, p. sp. 40-50 x 10-12 jut, 

 with abundant paraphyses. Sporidia oblong-ovate or oblong-elliptical, 

 brown, uniseptate, slightly constricted, sometimes slightly curved and 

 slightly attenuated at the ends, 11-15x4-5 /*, crowded-biseriate, pale 

 brown at first, then dark brown. 



On loose bark of Platanus, Louisiana (Langlois 2213). 



Differs from A. fallax, A. umbrina and A. pseudo-umbrina, in 

 its smaller, biseriate sporidia, and from the last two, in its smaller, cov- 

 ered perithecia. Allied to A. dothideaspora, Cke. & Hark. 



A. quercetis, Cke. & Mass. Grev. XVI, p. 92. 



Perithecia gregarious, large (1 mm. diam.), at first immersed then 

 semiemergent, conic-convex, for a long time covered by the epidermis, 

 papillate, black, flattened at base. Asci cylindrical, 8-spored. Spo- 



