333 
GENUS 173, PERIDERMIUM. Chev.* 
Peridium elongated, at length ruptured irregularly. Neither of 
two British species have been found in our district. 
GENUS 174. zcIpIumM. P.t+ 
Peridium rarely elongated, opening by radiating, reflected teeth 
or very short, and bursting irregularly, Spores concatenate. 
1.—Aicidium Allii, Grev. On Allium ursinum, Rudlow. 
2.—Aicidium Ari. B. On Arum maculatum, Rudlow. 
3.—AKcidium rubellum P. On docks, Rudlow. Sow. t 405, 
4,—Aicidium primule De., near Bristol. 
5,—AKcidium ranunculacearum De. On buttercups, Rudlow. 
6,—AKcidium quadrifidum De. On garden anemones, Batheaston, 
&e. 
7,—Aicidium berberidis P. On barberry, Batheaston. Grev. t 
97. 
8.—Aicidium albescens Grev. On Adoxa moschatellina, Batheaston. 
9,—Aicidium crassum P. On Buckthorn, near Chippenham, P. 
Icones et Des. 10., fig. 1—2. 
10.—AXcidium euphorbie P. On spurge, Batheaston. 
11.—AKcidium urtice De. On nettles common. 
12.—ANcidium thesii. Desm. On Thesium linophyllum, Castle 
Coombe, Cooke, M.F. t B., fig. 50.51. Twelve species out 
of 30 in the “ outlines.” 
GENUS 175. ENDOPHYLLUM. Lev.i 
Peridium enclosed in the leaf, bursting irregularly. The only 
British species E. sempervivi has not occurred in our district. 
GENUS 176. SYNCHYTRIUM. De. By.§ 
Cellular bodies without any mycelium, seated beneath the 
* Peridermium, from peri, around, and derma, a skin. 
{ Acidium, from aikion a wheel. 
{ Endophyllum from endos within, and phyllon a leaf. 
§ Synchytrium from syn, together and chytris a vessel. 
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