155 
epispore furnished with very thin, slightly raised ridges, which 
anastomose to form a very small-meshed network ; mesh averaging 
15 » diameter. 
Host.—Triticum vulgare, Vill. 
HAB.—England ; King’s Cliffe, Northamptonshire, Berkeley. 
A very distinet species, included by Berkeley eresi Tilletia 
Caries, in his herbarium. Differs from the last-named, and 
from all other described species in the small-sized spores, ee in 
the very small mesh formed by the thin, slightly raised ridges on 
the epispore. Forming blackish lines on the culm ‘5-1 cm. long. 
x Fig. 23, spore of T. Berkeleyi. 
2T. en Sphagni, Nawaschin in Bot. Centralbl. 43 (1890), 
289. —Spore-mass brown, filling the en of Sphagnum ; spores 
globose, 11-12 » diam. ; epispore clear with 
a polygonal network.—Sace. Syll. ix. (1891), no. 1180. 
Host.—Sphagnum squarrosum, Pers. 
HAB.—Russia. 
This species is probably widely diffused, although only definitely 
recorded from Russia. The Tilletia spores are t those bodies which 
have previously been spoken of as the microspores of iridis o 
and the capsules in which they are produced were known as 
microsporangia. Not examined. 
Doubtful Species. 
Tilletia ips Ule in Hedwigia, 1886, 113; Sacc. Syll. 
a (1888), no. 1784. 
There is no Be description of this species. 
29. Tilletia Fischeri, Karsten in Finska his etre ee sins 
1879, 10; Mye. Fenn. iv. p. 10. Maines bee, formed in 
black ; spores globose or sub-globose, ame about 14 x gi or 
16 x 12 u .—Sace., Syll. vii. (1888), no. 
HosT.—Carez canescens, Linn. 
HAB.—Finland. 
The brief and incomplete diagnosis prevents placing this Species 
in any one section employed in the present paper, and s is not 
wise to trust to the host for the discrimination of a speci 
30. Tilletia Vulpie, P. Magnus in Verhandl. d. Zool.-Bot, Gesell. 
m. xm (1899), 89, t. 2, figs. 7-12. Spore-mass produced in 
the vary, , blackish, 192 x 16:9 p; epispore with a raised 
ne his : 
