400 



the lower, "smaller half 3-celled, with a gelatinous envelope which 1$ 

 constricted in the middle, brown, 50-74 x 14-20 fi. 



On dead branches of birch trees, Portville, N. Y. (Peck). 



Myxocyclus confluens, Riess is considered to be the pycnidial 

 (brni of this species. 



M. inquinans, (Tode). 



Sphceria inquinans, Tode Fungi Meckl. II, p. 17. 

 Sphceria gigaspora, Desm. Pi. Crypt. Ed. I, 3065, id. Ed, II, 1765, 

 Massaria gigaspora, Ces. & De Not. Schema, p. 43. 

 Massaria Bulliardi, Tul. Sel. Carp. II, p. 236. 

 Massaria inquinans, Fr. Summa, p. 369. 

 Exsicc. Fekl. F. Rh. 803. Rab. F. E. 1237, 1526. Thum. M. U. 1950. Sacc. M. Ven. 1189. 

 Roum, F. G. 1387. M. March. 1735. Rehm. Asc. 989, 



Perithecia thickly scattered, buried in the inner bark and pene- 

 trating to the wood, globose, 1-1 \ mm. diam., raising the epidermis 

 into distinct pustules, with the short-cylindrical ostiola erumpent. 

 Asci oblong-clavate, short-stipitate, 1 80-220 x 25-32 /i, with abundant 

 paraphyses, 8-spored. Sporidia inordinate or subbiseriate, oblong- 

 cylindrical, hyaline and uniseptate at first, and with a broad, hyaline 

 envelope, then brown and 3-septate, straight or only slightly curved, 

 70-90x15-20/;. 



On Viburnum prunifoliutn and V. dentatum, Pennsylvania 

 (Michener), on dead maple limbs, Orono, Maine, and Lyndonville, 

 N. Y., on dead Crataegus, London, Canada, and on dead Pyrus arbu- 

 tifolia, Bethlehem, Pa. (Rau). 



The perithecia often lie 2-3 close together and the bark is 

 whitened in a narrow stratum around them. Ambiguous forms occur 

 between this and M. vomitoria, which may with equal propriety be 

 referred to either species. From the absence of the circular, discoid 

 area around the ostiola, the American specc. might be referable to M, 

 gigaspora, Fckl., if that species is really distinct from M. inqui- 

 nans, which is very doubtful. Winter gives the measurements 

 of the sporidia as 80-103x21-23 [i, Sacc. 75-90x20-32 //. The 

 specc. in Renin's Asc. have the sporidia 60-70 x 15-18 p., and in Thum. 

 M. U. they are 75-80 x 18-20 //. The specc. of Sphceria gigaspora, 

 in Desm. PI. Crypt. Ed. I, 2065, have the sporidia 75-80x18-20 /i, 



M. vomitoria, B. & C. Grev. IV, p. 155. (Plate 29) 



Exsicc. EH. N. A. F. 97. EH. & Evrht. N. A. F. 2d Ser. I954. 



Perithecia scattered, or 2-3 lying close together, coriaceous, thick- 

 walled, 1 mm. and over diam., buried in the bark which is scarce!}' 

 raised above them, but merely pierced by the inconspicuous, scarcely 

 projecting ostiolum, Asci broad clavate-fusoid, 150-200x25 fi, 8- 



