331 
1.—Melampsora euphorbie Cast. On spurge. Cooke M.F., pl. 
ix., fig. 193, 194. Common. 
2,—Melampsora salicina Zév. On sallow, Batheaston. Two out 
of five in the “ Outlines.” 
GENUS 166. LECYTHEA Lév. 
Stroma surrounded or sprinkled with elongated, abortive spores. 
Spores free, invested with their mother-cell, or concatinate. 
1.—Lecythea baryi. A.N.H. No. 755. On grass. 
2,—Lecythea euphorbie Zév. On spurge, Batheaston. 
3.—Lecythea saliceti Zév. On willows. Three out of twelve 
common British species. 
GENUS 167. Cystopus Lév.* 
Receptacle consisting of thick, branched threads. Spores con- 
catinate, at length separating. 
1.—Cystopus candidus Zév. Grev. t 251. Cooke M.F. pl. x., fig. 
198-200 and 205-207. On cabbages and various crucifere 
common. The only species in the “ Outlines.” Mr. Cooke 
has four. 
GENUS 168. POLYCYSTIS Lév.t 
Spores irregular, consisting of several cells. 
1.—Polycystis colchici Tul. Ann. Sci. Nat. VIL, p. 117, 1847. 
On leaves of autumnal crocus. Rudlow, Se. Catherines. 
2.—Polycystis viole B and Br. A. N. H. 487. Batheaston. 
On leaves of Viola odorata. 
3.—Polycystis pompholygodes Lév? On Helleborus viridis, near 
St. Catherine’s, Batheaston. Three out of four British 
species. 
GENUS 169. TILLETIA. Tul.t 
Spores spherical, springing from delicate branched threads. 
Epispore reticulated. 
* Cystopus, from kustos, a bladder, and pous, a foot. 
+ Polycystis, from polus, many, and kustos. 
{ Tilletia from Tillet, a French agriculturist. 
