On thallus of Lecanora glaucoma, var. corallina, L. (Hepp) ; 
and Pertusaria ocellata, var. corallina, Korb. (Par., 465). 1 
Spores spherical, simple, brown. A Fungus according to 
Fries (Syst. Myc., iii, 257) ; and Xy lander (Trod., 91), who 
refers it to the genus Spilomium ( Uredinece ), a genus which 
includes other Micro-fungi parasitic on Lichens. 
Genus XVI. — Cercidospora, Kijrb., Par., 465. 
Species 1. C. U/othii, Korb., Par., 466. 
On thallus of Srjuamaria saxicola (Korb.), and on apothecia 
of Lecanora polytropa (Th. Fries, L. Spitsb., 22). 
Spores 4, fusiform, 2 -locular, colourless. 
Genus XVII. — Pharcidia, Korb., Par., 469. 
Species 1. P. congesta, Korb., Par., 4~0. 
Syn. L. subfusca, v. pharcidia, Ach. 
On apothecia of Lecanora subfusca, and var. intumescens, 
Fw. 
Spores 8, 2 — 4-locular, colourless, linear or rod-shaped. 
Genus XVIII. — Polycoccum, Saul. Korb., Par., 470. 
Species 1. P. Sauteri, Korb., Par., 470. 
Syn. P. condensatum, Saut. 
Catopyrenium, Hampe. 
On protothallus of Stereocaidon condensatum. 
Spores 8, small, 2-locular, brown. 
Genus XIX. — Sokothelia, Kijrb., Par., 471. 
Species 1. S. confluens, Korb., Par., 472. 
On thallus of Phlyctis argena. 
Spores 8, soleaform (2-locular), brown. 
Genus XX. — Rhagadostoma, Korb., Par., 472. 
Species 1. R. corrugatum, Korb., Par., 472. 
On thallus of Solorina crocea. 
1 It appears to me that the host, on which the parasite usually occurs, is 
the common Isidium corallinum, Ach., which is apparently a mere condition 
of several very different Lichens, e. g. — 
1. Pertusaria syncarpa, Mudd, 
var. corallina, L. ; Mudd, 273. 
2. P. ocellata, Wallr., 
var. corallina, Ach.; Korb., Par., 311. 
3. Lecanora glaucoma, Ach., 
var. coralloidea , Fw. ; Korb., Par., 89; Fries, 378 ; Schaer., 71. 
VOL. IX. — NEW SER. Z 
