1G8 THE JOURNAL OF BOTANY 



agreed very closely with bis and liostrup's descriptions, Lut no pyc- 

 nidial wall could be detected. 



371. Marssonia Secalis Oud. in Hedwig. 189S, p. 181. Sacc. 

 Syll. xvi. 1011. 



Spots indefinite, up to 1 cm. long, pallid, often bordered with 

 purple, visible on both sides of the leaf. Pustules almost imper- 

 ceptible, even with a lens, pale, more translucent than the leaf-tissue, 

 roundish, flat, about 200 /x diam., totally immersed. SjDores oblong- 

 fusoid, hyaline, curved in profile, at times almost beaked at the apex 

 and terminated b}^ a rather obtuse mucro, 15-20 x 3-4 fx, the lower 

 cell narrower than the upper ; sjDoroj^hores very short. 



On fading leaves of R3^e {Secale Cereale). Newton Abbot. May, 

 June (Comm. A. D. Cotton). 



PsAMMiNA Kouss. & Sacc. Contr. Mvc. Belg. iv. 295. 

 Sacc. Syll. x. 498. " 



Pustules subepidermal, thin, subgelatinous. Spores cylindrical, 

 septate, hyaline, numerous, persistentl}^ cohering at the base, and 

 radiately diverging so as to form a subhemispherical head. 



As it were, a dwarf form of Prostliemiella. 



372. PSAMMTNA Bo^tMERI.E R. & S. /. C. 



Pustules scattered, gelatinous, somewhat olivaceous, immersed. 

 Spores c^dindrical, hyaline, 2-5-septate, 20-30 /x long, united together 

 at the base to the number of 15-25 and forming a distinct head, at 

 length emerging and clinging together to form little fugacious pallid 

 granules. (Pig. 17.) 



On dead leaves of Fsamma arenaria. Aug. Dundonald and 

 Stevenston, Ayrshire, and Cumbrae, Buteshire (Boyd), accompanied 

 in the latter case by AntJiosfomeUa ammopliila. Sacc. Syll. i. 

 lij^^Sphceria ammopliiJa Ph. & PI. in Grevill. x. 73, pi. 158, f. 5. 



USTILAGIXE^. 



373. CiNTRACTiA suBTXCLUSA Magnus, Ustil. 1896, p. 79. 

 TIstilago siihinclusa Korn. in Hedwig. 1874, p. 159. 'Winter, 



Die Pilze, i. 97. Schrot. Pilz. Schles. lii. 271. Fisch. Waldh. 

 Aper9. Svst. Ust. p. 2G. Sacc. Syll. vii. 472. Antliracoidea siihin- 

 clusa Bref . Untersuch. 1895, xii. 146, pi. 9, figs. 1-3. 



Sori black, then olive-brown, at first rather firm, at length broken 

 and deformed, destitute of filaments, filling the ovary and finally 

 bursting its coat. Spores globose or ellipsoid, or even angular, 

 13-20 X 11-18 fx ; epispore dark blackish brown, rather opaque, beset 

 with h^^aline, obtuse, thick, irregular, wart-like spines. 



In the ovaries of Carex riparia, Bradnock's Marsh (Mr. E. W. 

 Mason). In the same. Wood End, near Tanworth. June-Oct. 



This parasite often attacks only a few ovaries in each spikelet ; 

 the others, according to Brefeld, may at the same time be occupied 

 by JJsfilacjo olivacea. It has been recorded on five species of Carex 

 in Grerman3\ The genus Cinfractia differs from UstUago in having 

 the spores agglutinated into a firm, long coherent mass \>j the 



