Pi, cell. aph. 6. SARCOTHALAMEZ. 135. Actid. 509 
Actidium Esenbeckii. Esenheck’s actidium. 
Thece roundish, flat ; mowth with five or six valves turned 
back. 
Hysterium valvatum, Esenbeck Syst. 1,281. 
On decayed wood. 
II. 136. HYPODERMA. De Candolle. — Hypoderme. 
Thallus 0; thece long, linear, bursting the epidermis; 
mouth a simple, linear slit. 
1. Hypoderma fraxini. Ash-tree hypoderme. 
Thece opake, blackish, ovate oblong, convex; mouth 
deep, lips turned back. 
Sphzria sulcata, Bolton Fungi, 124; Sowerby Engl, Fungi, 315. 
Hysterium fraxini, Persoon Syn. Fung. 100. 
Hypoderma fraxini, De Cand. Syn. Fl. Gall, 64. 
On the branches of ash and maple. 
2. Hypoderma quercinum. Oak hypoderme. - 
_ Thece greyish-black, oblong, large, rather bellied, bent; 
lips acute, crisped. 
Hysterium nigrum, Tode Fung. 1, 5. 
Variolaria corrugata, Bulliard Champ. 117. 
Spheria collapsa, Sowerby Engl. Fungi, 373. 
Hypoderma quercinum, De Cand, Syn. 64. 
On dead sticks. 3 
3. Hypoderma conigerum. Conebearing hypoderme. 
Thece blackish, rather ovate, very small; inside wrinkly, 
powdery. | 
Hysterium conigerum, Persoon Syn. 102. 
Hypoderma conigerum, De Cand. Syn. 824, 
On dried strobiles of fir-trees. 
4. Hypoderma crispum. Crisp hypoderme. 
Thece long, convex, rather bellied ; lips thin, crisp. 
Hysterium crispum, Persoon Syn. F. 101. 
Hypoderma crispum, De Cand. Syn. 826.* * 
On the bark of pine-trees. 
5. Hypoderma arundinaceum. Reed hypoderme. 
_ Thece oval, depressed, greyish black, granular. 
Hypoderma arundinaceum, De Cand. Syn. 825. 
On dead stems of arundo vallatoria. 
